Digi TransPort WR31 User Manual page 601

Configure legacy protocols
LAPD Parameters
Calling Prefix
The call prefix to inserted in front of the NUA in calls being switched to LAPD. For example, if the
called NUA in the call being received by the LAPB 0 interface is 56565, and the call prefix is 0242,
the call placed on the LAPD interface is to NUA 024256565. Also, for calls in the reverse direction,
if the prefix in the calling NUA matches this parameter, it is removed from the calling NUA field.
D-Channel LCN
The value of the first LCN assigned for outgoing X25 calls on LAPD.D-Channel LCN Direction.
Max VCs: Unlimited
The maximum number of Virtual Circuits (VCs) on an LAPD interface. When the maximum has
been reached, the backup call will take place immediately, or the call will clear if there is no
backup call. If this parameter is set to 0, there is no limit.
Default Packet Size
The default packet size for X.25 calls being switched onto LAPD. The default packet size is 128,
other possible values are 256, 512, or 1024 bytes.
Default Window Size
The default window size for calls being switched onto LAPD. The default window size is 2; the
valid range is 1 to 7.
Digi TransPort WR Routers User Guide
Configure Protocol Switch software
601