Digi TransPort - Page 573

Configure Protocol Switch software
Digi TransPort User Guide 573
LAPB Parameters
LCN
The value of the first LCN that will be assigned for outgoing X25 calls on LAPB.
LCN direction: Up Down
Determines whether the LCN used for outgoing X.25 calls on LAPB is incremented
or
decremented from the starting value.
Max VCs: Unlimited
The maximum number of Virtual Circuits (VCs) used on an LAPB interface. When the
maximum has been reached, then the backup call occurs immediately, or the call will clear if
there is no backup call. If this parameter is set to 0, there is no limit.
B-Channel Number
An ISDN number used for calls being switched in the direction of LAPB 0 or LAPB 1.
Enable ENQ Char
When this parameter is set to On, when an incoming call on LAPB is switched and the router
connects to it, the X.25 switch sends a data packet on the LAPB X.25 SVC containing the ENQ
character.
LAPB 0 Default Packet Size: 128 256 512 1024
The default packet size for calls being switched onto LAPB 0. The default packet size is 128.
Other possible values are 256, 512, or 1024 bytes.
LAPB 0 Default Window Size: 2 1 3 4 5 6 7
The default window size for calls being switched onto LAPB 0. The default window size is 2.
The valid range is 1 to 7.
LAPB 1 Default Packet Size: 128 256 512 1024
The default packet size for calls being switched onto LAPB 1. The default packet size is 128.
Other possible values are 256, 512, or 1024 bytes.
LAPB 1 Default Window Size: 2 1 3 4 5 6 7
The default window size for calls being switched onto LAPB 1. The default window size is 2.
The valid range is 1 to 7.
LAPB 2 Default Packet Size: 128 256 512 1024
The default packet size for calls being switched onto LAPB 2. The default packet size is 128.
Other possible values are 256, 512, or 1024 bytes.
LAPB 2 Default Window Size: 2 1 3 4 5 6 7
The default window size for calls being switched onto LAPB 2. The default window size is 2.
The valid range is 1 to 7.