User`s guide

5-6 Preliminary November 23, 1998 MultiVoice Gateway for the MAX— User’s Guide
Configuring the WAN Interfaces
Configuring T1 lines
Example of configuring Pre-T310 Timer
The ISDN Pre-T310 timer allows users calling into a MultiVoice Gateway to get better
clarification of call disconnects during the initial set up of the call. If a call is presented to the
MultiVoice Gateway, and there is an extended period of delay while the call is being set up (for
example, local Ethernet traffic slowing down RADIUS requests or DNS lookups), you might
want your users to get a disconnect indication other than the generic Normal call clearing.
In compliance with CCITT Specification Q.931, the MultiVoice Gateway sends a Call
Proceeding message to the network switch for every call it accepts.
The network switch sets its T310 timer as it awaits further messages from the MultiVoice
Gateway. The switch tears down the call if the T310 timer expires. When this happens, the
switch reports ISDN code 16 (Normal call clearing) to the calling device.
The ISDN Pre-T310 timer adds a MultiVoice Gateway-specific timer, which must be set to a
time period less than that of the T310 timer on the switch. Then, after the MultiVoice
Gateway-specific timer expires but before the T310 timer expires, the MultiVoice Gateway
sends ISDN code 17 (User Busy) and clears the call.
Note: Only calls presented on T1/PRI lines support the Pre-T310 timer feature.
To configure the Pre-T310 timer:
1 Open the Net/T1 > Line Config > Line menu.
2 Set the Send Disc parameter to a value of from 0 to 60 seconds.
The parameter must be set to a value less than the T310 timer value, so that it expires (and
the MultiVoice Gateway sends its ISDN disconnect) before the T310 timer.
3 Open the Ethernet > Mod Config > Auth menu.
4 Set the Timeout Busy = Yes if you would like User Busy sent when the Send Disc timer
expires. Set Timeout Busy = No if you would like Normal call clearing sent.
Note: The Timeout Busy parameter replaces the CLID Timeout Busy parameter.
DNIS and ANI collection
DNIS/ANI are automatically collected when you set the signalling mode to ISDN. The Collect
DNIS/ANI parameter will be set to N/A, and is ignored by the MAX when processing ISDN
signalling.
Configuring a line for robbed-bit signalling
To configure a T1 line for robbed-bit signalling:
1 Open Net/T1 > Line Config, and set the 2nd Line to Trunk (for example):
Net/T1
Line Config
Name=
1st Line=Trunk
2nd Line=Trunk
2 Open the Line 2 subprofile and set the signalling mode to Inband:
Line 2...
Sig Mode=Inband