COMSPHERE 392xPlus Modems
4-68
November 1996
3920-A2-GN31-30
Table 4-14
(3 of 3)
Miscellaneous Configuration Options — Singleport Mode
A
NetworkPosition: Tributary
End Tributary Control
Network Position Identification. Each modem must be identified either as a control modem or a tributary modem.
NOTE: Changes to this configuration option will cause the modem to reset.
NOTE: This configuration option is only applicable for leased-line network management applications.
For the Model 3920
Plus, Tributary is the factory default.
For the Model 3921
Plus, Control is the factory default.
The AT command for Tributary is S74=0.
The AT command for Control is S74=1.
NetMngmtAddress: 256
Nxt 256
This configuration option is not available in point-to-point tributaries, which are always set to address 01.
Network Management Address. Determines the address used when accessing a modem from the NMS or when using
DCP functions that require network management addresses. Within a network link, a control modem can communicate
with a tributary modem by using the tributary modem’s network management address. Each TMp tributary modem must
have a different network management address. Address values range from 001 to 256.
NOTE: Changes to this configuration option will cause the modem to reset.
Diag Connection: Modem(DC)
Nxt Modem(DC) NMS(CC) Disable
This configuration option does not appear when the LeaseLine Rate is configured for TMp and the NetworkPosition is
configured for Tributary.
Diagnostic Connection. Allows the configuration of the serial diagnostic port of the modem to be either a diagnostic
channel that is connected to another modem (DC), or a control channel that is connected to a network management
device (CC).
NOTE: Changes to this configuration option will cause the modem to reset.
Modem (DC) – Selects the Diagnostic Channel.
NMS (CC) – Selects the Control Channel.
Disable – Prevents messages being sent from the diagnostic port.
The AT command is S-Register S90=
n, where n is 0 for Disable and 1 for Enable.
Link Delay(sec): 0 1
Nxt 0 1 2 5 10 20 50
Link Delay Seconds. Controls the length of time (in seconds) a modem will wait for responses from the downstream
devices. This configuration option is used to calculate protocol timers for polling and normal selection.
NOTE: The estimated roundtrip delay in the diagnostic link is entered.
Security — Singleport Mode
A
The Security configuration options allow you to set the parameters that control how a dial access
security password is entered. For security configuration options, refer to Chapter 6, Dial Access
Security.
