Change Ctl Desc (Remote WS) (CHGCTLRWS)
| Where allowed to run: All environments (*ALL) Threadsafe: No |
Parameters Examples Error messages |
The Change Controller Description (Remote Work Station) (CHGCTLRWS) command changes a controller description for a remote work station controller.
Restriction: You must have input/output system configuration (*IOSYSCFG) special authority to use this command.
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Parameters
| Keyword | Description | Choices | Notes |
|---|---|---|---|
| CTLD | Controller description | Name | Required, Key, Positional 1 |
| ONLINE | Online at IPL | *SAME, *YES, *NO | Optional |
| ACTSNBU | Activate swt network backup | *SAME, *YES, *NO | Optional |
| SWTLINLST | Switched line list | Single values: *SAME Other values (up to 64 repetitions): Name |
Optional |
| CODE | Character code | *SAME, *EBCDIC, *ASCII | Optional |
| DEVWAITTMR | Device wait timer | 2-600, *SAME | Optional |
| MAXFRAME | Maximum frame size | 265-1994, 256, 261, 265, 512, 521, 1033, 1994, *SAME, *LINKTYPE | Optional |
| RMTLOCNAME | Remote location | Communications name, *SAME | Optional |
| LCLLOCNAME | Local location | Communications name, *SAME, *NETATR | Optional |
| RMTNETID | Remote network identifier | Communications name, *SAME, *NETATR, *NONE | Optional |
| SSCPID | SSCP identifier | 000000000001-FFFFFFFFFFFF, *SAME | Optional |
| INLCNN | Initial connection | *SAME, *ANS, *DIAL | Optional |
| DIALINIT | Dial initiation | *SAME, *LINKTYPE, *IMMED, *DELAY | Optional |
| CNNNBR | Connection number | Character value, *SAME, *DC, *ANY | Optional |
| ANSNBR | Answer number | *SAME, *CNNNBR, *ANY | Optional |
| CNNLSTOUT | Outgoing connection list | Name, *SAME | Optional |
| CNNLSTOUTE | Connection list entry | Name, *SAME | Optional |
| IDLCWDWSIZ | IDLC window size | 1-31, *SAME, *LIND | Optional |
| IDLCFRMRTY | IDLC frame retry | 0-100, *SAME, *LIND | Optional |
| IDLCRSPTMR | IDLC response timer | 10-100, *SAME, *LIND | Optional |
| IDLCCNNRTY | IDLC connect retry | 1-100, *SAME, *LIND, *NOMAX | Optional |
| PREDIALDLY | Predial delay | 0-254, *SAME | Optional |
| REDIALDLY | Redial delay | 0-254, *SAME | Optional |
| DIALRTY | Dial retry | 0-254, *SAME | Optional |
| SHMDSCLMT | SHM disconnect limit | 1-254, *SAME, *NOMAX | Optional |
| SHMDSCTMR | SHM disconnect timer | 2-3000, *SAME | Optional |
| STNADR | Station address | 01-FE, *SAME | Optional |
| POLLPTY | SDLC poll priority | *SAME, *YES, *NO | Optional |
| POLLLMT | SDLC poll limit | 0-4, *SAME | Optional |
| OUTLMT | SDLC out limit | *SAME, *POLLLMT, 0, 1, 2, 3, 4 | Optional |
| CNNPOLLRTY | SDLC connect poll retry | 0-65534, *SAME, *CALC, *NOMAX | Optional |
| NDMPOLLTMR | SDLC NDM poll timer | 0-3000, *SAME, *CALC | Optional |
| ADPTADR | LAN remote adapter address | 000000000001-FFFFFFFFFFFF, *SAME | Optional |
| DSAP | LAN DSAP | *SAME, 04, 08, 0C, 10, 14, 18, 1C, 20, 24, 28, 2C, 30, 34, 38, 3C, 40, 44, 48, 4C, 50, 54, 58, 5C, 60, 64, 68, 6C, 70, 74, 78, 7C, 80, 84, 88, 8C, 90, 94, 98, 9C | Optional |
| SSAP | LAN SSAP | *SAME, 04, 08, 0C, 10, 14, 18, 1C, 20, 24, 28, 2C, 30, 34, 38, 3C, 40, 44, 48, 4C, 50, 54, 58, 5C, 60, 64, 68, 6C, 70, 74, 78, 7C, 80, 84, 88, 8C, 90, 94, 98, 9C | Optional |
| LANFRMRTY | LAN frame retry | 0-254, *SAME, *CALC | Optional |
| LANCNNRTY | LAN connection retry | 0-254, *SAME, *CALC | Optional |
| LANRSPTMR | LAN response timer | 0-254, *SAME, *CALC | Optional |
| LANCNNTMR | LAN connection timer | 0-254, *SAME, *CALC | Optional |
| LANACKTMR | LAN acknowledgement timer | 0-254, *SAME, *CALC | Optional |
| LANINACTMR | LAN inactivity timer | 0-255, *SAME, *CALC | Optional |
| LANACKFRQ | LAN acknowledgement frequency | 0-127, *SAME, *CALC | Optional |
| LANMAXOUT | LAN max outstanding frames | 1-127, *SAME, *CALC | Optional |
| LANACCPTY | LAN access priority | 0-3, *SAME, *CALC | Optional |
| LANWDWSTP | LAN window step | 1-127, *NONE, *SAME | Optional |
| NETLVL | X.25 network level | *SAME, 1980, 1984, 1988 | Optional |
| LINKPCL | X.25 link level protocol | *SAME, *QLLC, *ELLC | Optional |
| CNNPWD | X.25 connection password | Character value, *SAME, *NONE | Optional |
| SWTLINSLCT | X.25 switched line selection | *FIRST, *CALC, *SAME | Optional |
| DFTPKTSIZE | X.25 default packet size | Element list | Optional |
| Element 1: Transmit value | *SAME, *LIND, 64, 128, 256, 512, 1024, 2048, 4096 | ||
| Element 2: Receive value | *SAME, *LIND, *TRANSMIT, 64, 128, 256, 512, 1024, 2048, 4096 | ||
| DFTWDWSIZE | X.25 default window size | Element list | Optional |
| Element 1: Transmit value | 1-15, *SAME, *LIND | ||
| Element 2: Receive value | 1-15, *SAME, *LIND, *TRANSMIT | ||
| USRGRPID | X.25 user group identifier | Character value, *SAME, *NONE | Optional |
| RVSCRG | X.25 reverse charging | *SAME, *NONE, *REQUEST, *ACCEPT, *BOTH | Optional |
| X25FRMRTY | X.25 frame retry | 0-21, *SAME | Optional |
| X25CNNRTY | X.25 connection retry | 0-21, *SAME | Optional |
| X25RSPTMR | X.25 response timer | 1-2550, *SAME | Optional |
| X25CNNTMR | X.25 connection timer | 1-2550, *SAME | Optional |
| X25DLYTMR | X.25 delayed connection timer | 1-32767, *SAME, *CALC | Optional |
| X25ACKTMR | X.25 acknowledgement timer | 0-2550, *SAME | Optional |
| X25INACTMR | X.25 inactivity timer | 1-2550, *SAME | Optional |
| USRFCL | User facilities | Character value, *SAME, *NONE | Optional |
| ALCRTYTMR | Allocation retry timer | 1-9999, *SAME | Optional |
| AUTOCRTDEV | Autocreate device | *SAME, *ALL, *NONE | Optional |
| SWTDSC | Switched disconnect | *SAME, *YES, *NO | Optional |
| CMNRCYLMT | Recovery limits | Single values: *SAME, *SYSVAL Other values: Element list |
Optional |
| Element 1: Count limit | 0-99 | ||
| Element 2: Time interval | 0-120 | ||
| MSGQ | Message queue | Single values: *SAME, *SYSVAL, *SYSOPR Other values: Qualified object name |
Optional |
| Qualifier 1: Message queue | Name | ||
| Qualifier 2: Library | Name | ||
| TEXT | Text 'description' | Character value, *SAME, *BLANK | Optional |
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Controller description (CTLD)
This is a required parameter.
Specifies the name of the controller description.
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Online at IPL (ONLINE)
Specifies whether this object is automatically varied on at initial program load (IPL).
- *SAME
This value does not change.
- *YES
The controller is automatically varied on at IPL.
- *NO
The controller is not automatically varied on at IPL.
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Activate swt network backup (ACTSNBU)
Specifies, for modems that support the switched network backup (SNBU) feature and that are not IBM 386x, 586x, or 786x models, whether the SNBU feature is activated or deactivated. The local modem and remote modem must both support the SNBU to activate it. IBM 386x, 586x, and 786x models are activated with a hardware switch only. This feature lets you bypass a broken nonswitched connection (nonswitched line) by establishing a switched connection.
- *SAME
This value does not change.
- *NO
The SNBU feature is not used.
- *YES
The SNBU feature is activated. You must also specify a value of *YES for the Activate swt network backup (ACTSNBU) parameter for the line.
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Switched line list (SWTLINLST)
Specifies the names of the switched lines to which this controller attaches. The line descriptions must already exist. Up to 64 switched line names can be specified.
- *SAME
This value does not change.
- switched-line-name
Specify the names of up to 64 lines that are connected to this controller. The same line name can be used more than once. For each line name specified, a line description by that name must already exist.
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Character code (CODE)
Specifies whether the extended binary-coded decimal interchange code (*EBCDIC) or the American National Standard Code for Information Interchange (*ASCII) character code is used on the line.
- *SAME
This value does not change.
- *EBCDIC
The extended binary-coded decimal interchange code (EBCDIC) character code is used.
- *ASCII
- The ASCII character code is used.
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Device wait timer (DEVWAITTMR)
Specifies the device wait timeout value. This is used to limit the amount of time that a subsystem takes for the work station input/output to complete. The timeout value that is used for each device is obtained from the controller that it is attached to at vary on time. A change in this parameter value takes effect for attached devices when they are next varied on.
- *SAME
This value does not change.
- device-wait-timer
Specify a value ranging from 2 through 600 that specifies the maximum number of seconds that the subsystem waits for work station input/output to complete for all work stations attached to this controller.
When selecting a value for this parameter, the types of devices attached to the controller should be taken into account. Locally attached work stations should have a low value for this parameter (10 seconds or less).
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Maximum frame size (MAXFRAME)
Specifies the maximum frame (path information unit (PIU)) size the controller can send or receive. This value is used to calculate the request unit (RU) sizes. Since the maximum PIU size that the controller can send or receive is negotiated at exchange identifier time, the maximum PIU size used at run time may be different. This value matches the corresponding value on the host system.
- *SAME
This value does not change.
- *LINKTYPE
For a 3174 controller with a link type of *ISDN, a value of 521 is used. For a 3174 controller with a link type of *LAN, a value of 1994 is used. For a 3174 controller with a link type of *SDLC, a value of 265 is used. For a 3174 controller with a link type of *X25, a value of 256 is used. For a 5394 controller with a link type of *X25, a value of 512 is used. For a 5394 controller with a link type of *SDLC, a value of 517 is used.
- maximum-frame-size
- For a 3174 controller with a link type of *SDLC or *X25, specify the value 265.
- For a 5394 controller with a link type of *X25 line, specify 265 or 521.
- For a 5394 controller with a link type of *SDLC, specify 261 or 517.
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Remote location (RMTLOCNAME)
Specifies the NAME of the remote location associated with the remote system.
- *SAME
This value does not change.
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Local location (LCLLOCNAME)
Specifies the local location name.
- *SAME
This value does not change.
- *NETATR
The LCLNETID value specified in the system network attributes is used.
- local-location-name
Specify the name (8 characters maximum) by which the local system is known to the remote system.
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Remote network identifier (RMTNETID)
Specifies the NAME of the remote network in which the adjacent control point resides.
- *SAME
This value does not change.
- *NETATR
The LCLNETID value specified in the system network attributes is used.
- *NONE
- No remote network identifier (ID) is used.
- remote-network-identifier
Specify the remote network identifier.
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SSCP identifier (SSCPID)
Specifies the system service control point identifier of the host system.
- *SAME
This value does not change.
- system-service-control-point-identifier
Specify the system service control point identifier as a 12-digit hexadecimal value.
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Initial connection (INLCNN)
Specifies the method used to establish a connection with this controller.
- *SAME
This value does not change.
- *DIAL
The system initiates outgoing calls and answers incoming calls.
- *ANS
The connection is made by the IBM System i5 when it answers an incoming call from this controller. If a call is received from the remote controller and all necessary conditions are met, the incoming call is answered by the system.
For X.25 connections, the line attached to the controller requires switched virtual circuits (SVCs) configured on the LGLCHLE parameter of type OUT or BOTH(*SVCOUT or *SVCBOTH) for the connection to succeed.
The line can be changed using the Change Line Description (X.25) (CHGLINX25) command.
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Dial initiation (DIALINIT)
Specifies the method used to make the initial dial on a switched line between the system and the remote controller.
- *SAME
This value does not change.
- *LINKTYPE
The type of dial connection initiated is specified on the LINKTYPE parameter. For LAN or SDLC short-hold mode connections, the default is to dial the connection as soon as the controller description is varied on. For all other link types, the default is to delay dialing.
- *IMMED
The dial connection is initiated as soon as the controller description is varied on.
- *DELAY
The dial connection is delayed until a job is initiated that requests the use of the remote controller resources.
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Connection number (CNNNBR)
Specifies the telephone number to dial to connect to this controller.
- *SAME
This value does not change.
- *DC
Direct call is being used in an X.21 circuit switched network.
- *ANY
- The system accepts calls from any network address.
- connection-number
Specify the connection number.
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Answer number (ANSNBR)
Specifies the X.25 network address from which calls are accepted.
- *SAME
This value does not change.
- *CNNNBR
Calls from the X.25 network address specified on the CNNNBR parameter are accepted.
- *ANY
Calls are accepted from any X.25 network address.
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Note: This parameter is no longer supported. It exists solely for compatibility with releases earlier than Version 5 Release 3 Modification 0 of operating system.
Outgoing connection list (CNNLSTOUT)
Specifies, for ISDN switched connections, the name of a connection list object that contains the ISDN assigned numbers for a dial out operation to the ISDN.
- *SAME
This value does not change.
- list-object
Specify the name of a connection list object.
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Note: This parameter is no longer supported. It exists solely for compatibility with releases earlier than Version 5 Release 3 Modification 0 of operating system.
Connection list entry (CNNLSTOUTE)
Specifies, for ISDN switched connections, the entry name from the connection list that is used to make a call to the ISDN. The connection list must have been identified on the Outgoing connection list (CNNLSTOUT) parameter.
- *SAME
This value does not change.
- entry-name
Specify an entry name.
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Note: This parameter is no longer supported. It exists solely for compatibility with releases earlier than Version 5 Release 3 Modification 0 of operating system.
IDLC window size (IDLCWDWSIZ)
Specifies the window size for transmission to and reception controllers attached to the IDLC line.
- *SAME
This value does not change.
- *LIND
The value specified in the line description is used as the default window size.
- window-size
Specify the window size. Valid values range from 1 through 31.
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Note: This parameter is no longer supported. It exists solely for compatibility with releases earlier than Version 5 Release 3 Modification 0 of operating system.
IDLC frame retry (IDLCFRMRTY)
Specifies the maximum number of attempts to transmit a frame before reporting an error.
- *SAME
This value does not change.
- *LIND
The number of attempts specified in the line description is used.
- IDLC-frame-retry
Specify a number of attempts. Valid values range from 0 through 100.
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Note: This parameter is no longer supported. It exists solely for compatibility with releases earlier than Version 5 Release 3 Modification 0 of operating system.
IDLC response timer (IDLCRSPTMR)
Specifies the amount of time, in tenths of a second, to wait before retransmitting a frame if acknowledgement has not been received.
- *SAME
This value does not change.
- *LIND
The time specified in the line description is used.
- IDLC-response-timer
Specify an amount of time. Valid values range from 10 through 100 tenths of a second. For example, 100 tenths of a second equals 10 seconds.
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Note: This parameter is no longer supported. It exists solely for compatibility with releases earlier than Version 5 Release 3 Modification 0 of operating system.
IDLC connect retry (IDLCCNNRTY)
Specifies the number of times to attempt retransmission at connection time.
- *SAME
This value does not change.
- *LIND
The number of attempts specified in the line description is used.
- *NOMAX
- Indicates to continue until a successful transmission has been made.
- connect-retry
Specify a number of attempts. Valid values range from 1 through 100.
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Predial delay (PREDIALDLY)
Specifies the time interval to wait (in 0.5 second intervals) before dialing a number.
- *SAME
This value does not change.
- predial-delay
- Specify a value ranging from 0 to 254 units. Each unit represents 0.5 second. To indicate no delay, specify a value of 0.
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Redial delay (REDIALDLY)
Specifies the time interval to wait (in 0.5 second intervals) before re-dialing when the call attempt is unsuccessful.
- *SAME
This value does not change.
- redial-delay
- Specify a value from 0 to 254 units. Each unit represents 0.5 second. To indicate no delay, specify a value of 0.
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Dial retry (DIALRTY)
Specifies the number of re-dial attempts made by the system before considering the dialing unsuccessful.
- *SAME
This value does not change.
- dial-retry
- Specify a value from 0 to 254 in 0.5-second intervals, for the number of times the dialing will be tried.
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SHM disconnect limit (SHMDSCLMT)
Specifies the number of consecutive nonproductive responses that are required from the remote station before the connection can be suspended for this X.21 short hold mode connection. This parameter is used only if *YES is specified for the Short hold mode (SHM) parameter, and *NEG or *SEC is specified for the Data link role (ROLE) parameter.
- *SAME
This value does not change.
- *NOMAX
There is no disconnect limit.
- SHM-disconnect-limit
Specify a number from 1 to 254, indicating the number of consecutive nonproductive responses that must be received before the connection can be suspended.
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SHM disconnect timer (SHMDSCTMR)
Specifies, in tenths of a second, the minimum length of time that the primary system maintains the connection to the remote system for this X.21 short hold mode controller. This parameter is valid only if *YES is specified for the Short hold mode (SHM) parameter, and *NEG or *SEC is specified for the Data link role (ROLE) parameter.
- *SAME
This value does not change.
- SHM-disconnect-timer
Specify a value from 2 to 3000 in 0.1 second intervals.
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Station address (STNADR)
Specifies the station address used when communicating with the controller.
Valid values range from 00 to FE.
Note: 00 can be specified only for APPC controllers when *TDLC is specified for the Link type (LINKTYPE) parameter.
Note: If *SEC is specified on the ROLE parameter, this is the station address of the remote controller. If *PRI or *NEG is specified on the ROLE parameter, this is the local station address.
- *SAME
This value does not change.
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SDLC poll priority (POLLPTY)
Specifies whether this controller has priority when polled. This parameter can be specified only if SHM is *NO.
- *SAME
This value does not change.
- *NO
This controller does not have polling priority.
- *YES
This controller does have polling priority.
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SDLC poll limit (POLLLMT)
Specifies, for an SDLC secondary or negotiable controller, the number of consecutive polls issued to the same controller when the poll results in receiving frames. This parameter can be specified only if SHM is *NO.
- *SAME
This value does not change.
- 0
The default number of polls is zero.
- poll limit
Specify a number of polls. Valid values range from 0 through 4.
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SDLC out limit (OUTLMT)
Specifies the number of consecutive times SDLC allows the transmission of the maximum number of frames to a station, before allowing transmission to another station.
- *SAME
This value does not change.
- *POLLLMT
The value is the same as the one specified for the SDLC poll limit (POLLLMT) parameter.
- out-limit
Specify a value ranging from 0 through 4.
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SDLC connect poll retry (CNNPOLLRTY)
Specifies the number of times to retry connecting to a controller before reporting an error.
- *SAME
This value does not change.
- *CALC
The number of retries is 7 if the controller is switched, and *NOMAX if the controller is nonswitched.
- *NOMAX
The system will retry indefinitely.
- connect-poll-retry
Specify a value ranging from 0 to 65534 for the number of retries.
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SDLC NDM poll timer (NDMPOLLTMR)
Specifies the minimum interval at which a secondary station should be polled if a poll from the primary to the secondary (which is in normal disconnect mode (NDM)) does not result in receiving the appropriate response.
This parameter is valid only if the link type is *SDLC and the controller role is secondary or negotiable and *NO is specified on the SHM parameter.
- *SAME
This value does not change.
- *CALC
The poll interval is calculated by the system.
- NDM-poll-timer
Specify a value ranging from 1 to 3000 units. Each unit represents 0.1 second. To indicate no timer, specify 0.
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LAN remote adapter address (ADPTADR)
Specifies the 12-character adapter address of the remote controller. This is the address to which the system sends data when it communicates with the remote controller. This value can be obtained from the remote controller's configuration record. Valid values range from hex 000000000001 through hex FFFFFFFFFFFF.
- *SAME
This value does not change.
- adapter-address
Specify the adapter address of the remote controller.
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LAN DSAP (DSAP)
Specifies the destination service access point (DSAP). This is the logical address this system will send to when it communicates with the remote controller. This address allows the controller to properly route the data that comes from this system. The default value for the destination service access point is 04.
The value must match the value specified on the source service access point (SSAP) parameter in the remote controller's configuration record.
Note: The *OPC controller uses the value above for this field. The combination of RMTSYSNAME and DSAP defines a unique controller. This allows multiple controllers to exist between two systems.
- *SAME
This value does not change.
- destination-service-access-point
Specify a hexadecimal value ranging from 04 through 9C, in increments of 4 (for example, 04, 08, 0C, 10) to represent the destination service access point.
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LAN SSAP (SSAP)
Specifies the source service access point (SSAP). This is the logical address the local system uses when it sends data to the remote controller. This address allows the controller to properly route the data that comes from the local system. The default value for the source service access point is 04.
It must match the value assigned to the destination service access point (DSAP) in the remote controller's configuration record.
- *SAME
This value does not change.
- source-service-access-point
Specify a hexadecimal value ranging from 04 through 9C, in increments of 4 (for example, 04, 08, 0C, 10) to represent the source service access point.
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LAN frame retry (LANFRMRTY)
Specifies the number of times to retry a transmission when there is no acknowledgment from the remote controller in the time period specified by the LANRSPTMR parameter. This value is only used after a successful connection has been made.
- *SAME
This value does not change.
- *CALC
The system determines the timer value.
- LAN-frame-retry
Specify a value ranging from 0 through 254 for the number of times a frame is transmitted before an acknowledgement is received.
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LAN connection retry (LANCNNRTY)
Specifies the number of times a transmission is attempted before an acknowledgement is received. This value is used at connection time (unlike LANFRMRTY which is used after a connection has been made).
- *SAME
This value does not change.
- *CALC
The system determines the timer value.
- LAN-connection-retry
Specify a value ranging from 0 through 254 for the number of times the transmission is attempted before an acknowledgement is received.
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LAN response timer (LANRSPTMR)
Specifies the time period used to determine an inoperative condition on the link when connected.
- *SAME
This value does not change.
- *CALC
The system determines the timer value.
- LAN-response-timer
Specify a value from 1 to 254 units. Each unit represents 0.1 second. To indicate no timer, specify 0.
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LAN connection timer (LANCNNTMR)
Specifies the time period used to determine an inoperative condition on the link at connection time.
- *SAME
This value does not change.
- *CALC
The system determines the timer value.
- LAN-connection-timer
Specify a value ranging from 1 through 254 in 0.1-second intervals for the amount of time the system waits before an inoperative condition occurs. To indicate no timer, specify 0.
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LAN acknowledgement timer (LANACKTMR)
Specifies the time interval to delay sending acknowledgements for received frames.
- *SAME
This value does not change.
- *CALC
The system determines the timer value.
- LAN-acknowledgement-timer
Specify a value ranging from 1 to 254 units. Each unit represents 0.1 second. To indicate no timer, specify 0. If 0 is specified for the LAN acknowledgement frequency (LANACKFRQ) parameter, 0 must also be specified for this parameter. If a non-zero number is specified for the LANACKFRQ parameter, a non-zero number must also be specified for this parameter.
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LAN inactivity timer (LANINACTMR)
Specifies the time period used to determine an inactive condition for the controller.
- *SAME
This value does not change.
- *CALC
The system determines the timer value.
- LAN-inactivity-timer
Specify a value ranging from 1 through 255 in 0.1-second intervals for the length of time used to determine an inactive condition for the controller. To indicate no timer, specify 0.
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LAN acknowledgement frequency (LANACKFRQ)
Specifies the maximum number of frames received before sending an acknowledgement to the controller.
- *SAME
This value does not change.
- *CALC
The system determines the LAN acknowledgement frequency value.
- LAN-acknowledge-frequency
Specify a value from 0 to 127 for the number of frames received. If 0 is specified for the LAN acknowledgement timer (LANACKTMR) parameter, 0 must also be specified for this parameter. If a non-zero number is specified for the LANACKTMR parameter, a non-zero number must also be specified for this parameter.
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LAN max outstanding frames (LANMAXOUT)
Specifies the maximum number of frames that can be sent before an acknowledgement is received from the remote system.
- *SAME
This value does not change.
- *CALC
The system determines the LAN maximum outstanding frames value.
- LAN-maximum-outstanding-frames
Specify a value ranging from 1 through 127 for the number of frames that can be sent before an acknowledgement is received.
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LAN access priority (LANACCPTY)
Specifies the priority used for accessing the remote controller. The larger the number the higher the priority for this controller. This parameter is only used when the controller attaches to TRLAN.
- *SAME
This value does not change.
- *CALC
The system determines the LAN access priority value.
- LAN-access-priority
Specify a value from 0 to 3 for the access priority for this controller on a local area network (LAN).
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LAN window step (LANWDWSTP)
Specifies whether to reduce to 1 the maximum number of frames outstanding to the remote system during network congestion. This parameter (LAN Window Step) indicates the number of frames that must be successfully received by the remote system before the number of maximum outstanding frames can be increased by 1. The increase continues this way until the maximum number of outstanding frames reaches the value specified by the LAN maximum outstanding frames (LANMAXOUT) parameter.
- *SAME
This value does not change.
- *NONE
The number of outstanding frames is not reduced during network congestion.
- LAN-window-step
Specify a value from 1 to 127 for the number of frames that must be successfully received by the remote system before the maximum number of outstanding frames can be increased by 1.
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X.25 network level (NETLVL)
Specifies the level of the X.25 network used to access this controller. The level is specified by giving the year of the standard used by the X.25 network.
Note: Use of the lower value of the remote DTE or the network level is suggested; for example, if the remote DTE is using the CCITT standard of 1980 and the network 1984, specify 1980 for this parameter.
- *SAME
This value does not change.
- 1980
The 1980 Standard is used.
- 1984
The 1984 Standard is used.
- 1988
The 1988 Standard is used.
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X.25 link level protocol (LINKPCL)
Specifies the link level protocol used on the X.25 network to communicate with this controller.
- *SAME
This value does not change.
- *QLLC
The Qualified Logical Link Control (QLLC) protocol is used.
- *ELLC
The Enhanced Logical Link Control (ELLC) protocol is used.
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X.25 connection password (CNNPWD)
Specifies the X.25 network password used for password exchange with the X.24 Call Request and Incoming Call packets (Call User Data field). This parameter is not valid for permanent virtual circuit (PVC) connections.
If you want to use a connection password that consists of characters whose hexadecimal value is less than 40, you must specify the password as a hexadecimal value. When less than 8 bytes are specified, the end of the password field is padded with blanks. A password of all blank is valid. All incoming call requests must match this password to establish a connection.
To specify a hexadecimal password, the digits must be specified in multiples of two, be no more than 16 digits long, be enclosed in apostrophes, and be preceded by an X. For example, X'0102030405' is a valid hexadecimal password.
Note: This connection password is highly recommended for controllers that operate with the Enhanced Logical Link Control (ELLC) protocol LINKPCL(*ELLC) on switched virtual circuit (SVC) connections. This enhanced protocol supports reconnection of virtual circuits after network errors which disconnect the line with a clear signal; however, this reconnection is not allowed to proceed without the password validation procedure being used as a unique identifier for the controller.
- *SAME
This value does not change.
- *NONE
No connection password is used.
- X.25-connection-password
Specify the connection password. The password for each controller can consist of any alphanumeric characters represented by the hexadecimal values ranging from 40 through FF.
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X.25 switched line selection (SWTLINSLCT)
Specifies the method that is used to select lines from an X.25 switched line list.
- *SAME
This value does not change.
- *FIRST
Lines are selected beginning with the first line in the switched line list.
- *CALC
The system determines which line in the switched line list will be selected.
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X.25 default packet size (DFTPKTSIZE)
Specifies the default packet size used by the X.25 network for transmission and reception.
The possible transmission values are:
- *SAME
This value does not change.
- *LIND
The value specified in the line description is the default value.
- transmit-packet-size
Specify a default packet size for transmission. The valid values for the packet size are 64, 128, 256, 512, 1024, 2048, and 4096.
The possible reception values are:
- *SAME
This value does not change.
- *LIND
The value specified in the line description is the default value.
- *TRANSMIT
The value specified as the default packet size for transmission is used as the default for reception.
- receive-packet-size
Specify a default packet size for reception. The valid values for the packet size are 64, 128, 256, 512, 1024, 2048, and 4096.
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X.25 default window size (DFTWDWSIZE)
Specifies the default window size for transmission and reception.
Element 1: Transmit Window Size
- *SAME
This value does not change.
- *LIND
The value specified in the line description is used as the default window size.
- transmit-window-size
Specify the appropriate default window size. If you specified modulus 8, valid values range from 1 through 7. If you specified modulus 128, valid values range from 1 through 15. For switched virtual circuit (SVC) incoming calls, the system accepts the window size indicated in the Incoming Call packet facilities field.
Element 2: Receive Window Size
- *SAME
This value does not change.
- *LIND
The value specified in the line description is used as the default window size.
- *TRANSMIT
The value specified as the default window size for transmission is used as the default for reception.
- receive-window-size
Specify the appropriate default window size. If you specified modulus 8, valid values range from 1 through 7. If you specified modulus 128, valid values range from 1 through 15.
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X.25 user group identifier (USRGRPID)
Specifies the closed user-group ID for contacting this switched virtual circuit (SVC) controller on the X.25 network.
Specify the 2-digit decimal value, from 00 through 99, as provided by the network subscription. This parameter is not valid for permanent virtual circuit (PVC) connections. It is valid only for SVC circuit outgoing call operations and is ignored for SVC incoming call connections.
- *SAME
This value does not change.
- *NONE
A value is not specified for the user group identifier.
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X.25 reverse charging (RVSCRG)
Specifies whether reverse charges are accepted or requested when contacting this controller.
- *SAME
This value does not change.
- *NONE
No reverse charging for network tariff billing is accepted.
- *REQUEST
Charges are requested on outgoing call request packets.
- *ACCEPT
Reverse charging for network tariff billing is accepted on incoming requests.
- *BOTH
Both incoming and outgoing requests are accepted.
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X.25 frame retry (X25FRMRTY)
Specifies the maximum number of times a frame is sent after the response timer ends when connected to this controller. The value for this parameter depends on the quality of service provided by the network and the connection to that network; that is, the frequency of lost link protocol data units.
- *SAME
This value does not change.
- X.25 frame retry
Specify a value ranging from 0 through 21 for the number of times a frame is sent.
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X.25 connection retry (X25CNNRTY)
Specifies the maximum number of times that a logical link control (LLC) protocol data unit is sent after the connect response timer expires when connecting to this controller.
- *SAME
This value does not change.
- X.25 connection retry
Specify a value ranging from 0 through 21 for the number times a frame is sent.
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X.25 response timer (X25RSPTMR)
Specifies the time period allowed to return an acknowledgement when an LLC protocol data unit is sent while connected to this controller.
- *SAME
This value does not change.
- X.25 response-timer
Specify an amount of time in tenths of a second. Valid values range from 1 through 2550 in 0.1-second intervals.
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X.25 connection timer (X25CNNTMR)
Specifies the time period allowed to return an acknowledgement when an LLC protocol data unit is sent while connecting to this controller.
- *SAME
This value does not change.
- connection-timer
Specify an amount of time in tenths of a second. Valid values range from 1 through 2550 in 0.1 second intervals.
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X.25 delayed connection timer (X25DLYTMR)
Specifies the time interval between attempts to establish a connection to the controller.
- *SAME
This value does not change.
- *CALC
Use the values specified for the X.25 connection timer (X25CNNTMR) parameter and the X.25 connection retry (X25CNNRTY) parameter to determine how often and how many times to try establishing the connection.
- X.25-delay-timer
Specify a value ranging from 1 to 32767 units. Each unit represents 0.1 second. Connection attempts are repeated indefinitely at this time interval.
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X.25 acknowledgement timer (X25ACKTMR)
Specifies the amount of time to delay sending acknowledgements for received frames.
- *SAME
This value does not change.
- X.25-acknowledgment-timer
Valid values range from 1 to 2550 in 0.1 second intervals, or 0 to indicate no delay.
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X.25 inactivity timer (X25INACTMR)
Specifies the time period used to determine an inactive condition for the controller. Valid values range from 1 to 2550 in 0.1 second intervals.
- *SAME
This value does not change.
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User facilities (USRFCL)
Specifies a string of hexadecimal characters sent to the X.25 network to request additional services. The system allows up to 218 hexadecimal characters.
- *NONE
A value is not specified for the user facilities.
- *SAME
This value does not change.
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Allocation retry timer (ALCRTYTMR)
Specifies the length of time, in seconds, the system waits between attempts to establish an LU6.2 session.
- *SAME
This value does not change.
- 1-9999
Specify a length of time ranging from 1 through 9999 seconds.
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Autocreate device (AUTOCRTDEV)
Specifies whether device descriptions can be automatically created for this controller description.
- *SAME
This value does not change.
- *ALL
All dependent devices than can be automatically created for this controller, except APPC devices, are automatically created.
- *NONE
Dependent devices on this controller are not automatically created.
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Switched disconnect (SWTDSC)
Specifies whether the switched connection to this controller is dropped when the last device is varied off.
- *SAME
This value does not change.
- *NO
The switched connection is not dropped when the last device is varied off.
- *YES
The switched connection is varied off when the last device is varied off.
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Recovery limits (CMNRCYLMT)
Specifies the number of recovery attempts made by the system before an inquiry message is sent to the system operator. Also specifies the time (in minutes) that must elapse before the system sends an inquiry message to the system operator indicating that the recovery attempt count limit is reached.
Element 1: Maximum Recovery Limit
- *SAME
This value does not change.
- *SYSVAL
- The value in the QCMNRCYLMT system value is used.
- count limit
Specify the number of second-level recovery attempts to be made. Valid values range from 0 through 99.
Element 2: Recovery Time Interval
- time-interval
Specify the time interval (in minutes) at which the specified number of second-level recoveries are attempted. Valid values range from 0 through 120. If the value specified for count-limit is not 0, the value 0 specifies infinite recovery.
More information on communication recovery is in the Communcations Management book, SC41-5406.
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Message queue (MSGQ)
Specifies the message queue to which operational messages are sent.
- *SAME
This value does not change.
- *SYSVAL
- Messages are sent to the message queue defined in the QCFGMSGQ system value.
- *SYSOPR
- Messages are sent to the system operator message queue (QSYS/QSYSOPR).
Qualifier 1: Message queue
- name
- Specify the name of the message queue to which operational messages are sent.
Qualifier 2: Library
- name
- Specify the name of the library where the message queue is located.
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Text 'description' (TEXT)
Specifies the text that briefly describes the object.
- *SAME
This value does not change.
- *BLANK
No text is specified.
- character-value
Specify no more than 50 characters of text, enclosed in apostrophes.
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Examples
CHGCTLRWS CTLD(CTL005) SWTLINLST(LINE01)
CNNNBR('555-5950')
This command changes the controller description CTL005. The switched line list now contains only the name LINE01, and the connection number has changed to 555-5950.
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