Use the ALTLINK statement to specify members of a hunt group for incoming calls. The collection of lines in this group is assigned a single X.25 address. Incoming X.25 calls are accepted from any of the lines in the group and outgoing calls are rotated across the lines. If one of the lines is not operational, outgoing calls are rotated on to the next available line in the group.
Syntax
>>-ALTLINK--mchlu_name--+-DDN-----------+-----------------------> '-dnic dte_addr-' >--window_size--packet_size--logical_channels------------------><
Parameters
- mchlu_name
- The name of the physical circuit logical unit (NPSI MCH LU).
- DDN
- Use DDN for the Defense Data Network.
- dnic
- The X.121 Data Network Identifier Code (DNIC) for the public data network. dnic can be coded as PRIVATE or PRIV to denote a private X.25 network.
- dte_addr
- The X.25 DTE address for the link. The address must be from 1 - 15 decimal digits. This parameter is not coded for DDN links. Specify dte_addr as NONE to omit the calling address from the call request packet.
- window_size
- The window size to negotiate on switched virtual circuits, in the range of 1 - 7 for a modulo-8 network, or 1 - 127 for a modulo-128 network.
- packet_size
- Choose one of the following X.25 packet sizes as the default: 32, 64, 128, 256, 512, 1 024, 2 048, or 4 096 bytes.
- logical_channels
- The number of logical channels (switched virtual circuits) subscribed, in the range of 1 to 1 023.
Examples
The following example shows the
LINK, ALTLINK, FAST, and OPTIONS statements for a public network connection
with a two-line hunt group:
* NPSI MCH DTE Window Packet Logical
* LU Name DNIC Address Size Size Channels
* -------- ---- --------------- - ---- ---
Link XU021 3110 23456789 2 128 16
FAST XU021
Options PacketSize 1024
AltLink XU022 3110 34567890 2 128 8
FAST XU022
Options PacketSize 1024
Options AcceptReverseUsage notes
- The ALTLINK statement must follow a LINK statement.
- A DEST statement follows the last ALTLINK statement for a hunt group.
- If special options are required or fast connect is used, OPTIONS or FAST statements must immediately follow the ALTLINK to which they apply.