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Configuring a line for ISDN PRI service
When configuring ISDN PRI service for a MAX unit, you must configure ISDN signaling for
the line. Optionally, you can configure the unit to send either ISDN code 16 (Normal call
clearing) or code 17 (User busy) when the PRI switch servicing the unit triggers the T310
timer. Also, you can configure overlap receiving if you want the unit to obtain complete
called-number information from the network switch.
Configuring ISDN signaling
To configure a T1 line for ISDN signaling, proceed as follows:
1
2
3
4
If the profile you have configured is not the active profile, activate it as described in
"Activating a profile" on page 2-7.
Configuring the Pre-T310 timer
The ISDN Pre-T310 timer feature enables users calling into a MAX unit to get better
clarification of the reasons for call disconnects during the initial setup of the call. If a call is
presented to the unit, and there is an extended period of delay while the call is being set up (for
example, heavy local Ethernet traffic is 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 unit 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 MAX unit. The
switch tears down the call if the T310 timer expires. In this event, the switch reports ISDN
code 16 (Normal call clearing) to the calling device.
MAX 6000/3000 Network Configuration Guide
Open a Net/T1 > Line Config > Line Config profile and, depending on which line you are
configuring, set the 1st Line or 2nd Line parameter to Trunk. For example:
Net/T1
Line Config
Line Config profile
Name=
1st Line=Trunk
2nd Line=Disabled
Open the subprofile for the line you have set to trunk service, and set the signaling mode
to ISDN. For example, if you set 1st Line to Trunk, set the Sig Mode parameter in the Line
1 subprofile:
Line 1...
Sig Mode=ISDN
In the same subprofile, specify the framing and encoding values. For example:
Framing Mode=ESF
Encoding=B8ZS
Exit the Line Config profile and, at the exit prompt, select the exit and accept
option.
Configuring WAN Access
Configuring T1 lines
3-13
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