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3-14 MAX 6000/3000 Network Configuration Guide
Configuring WAN Access
Configuring T1 lines
To use the MAX ISDN Pre-T310 timer, it must be set to a time period less than that of the
T310 timer on the switch. Then, after the MAX unit’s Pre-T310 timer expires but before the
switch’s T310 timer expires, the MAX 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, proceed as follows:
1 Open a Net/T1 > Line Config > Line Config profile > Line N subprofile.
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 that of the switch’s T310 timer value, so
that it expires before the T310 timer.
3 Open the Ethernet > Mod Config > Auth subprofile.
4 Set the Timeout Busy parameter to Yes if you would like User Busy sent when the Send
Disc timer expires. Set Timeout Busy to No if you would like Normal call clearing sent.
Note: The Timeout Busy parameter replaces the CLID Timeout Busy parameter.
If the profile you have configured is not the active profile, activate it as described in
“Activating a profile” on page 2-7.
Overlap receiving for the MAX unit
Overlap receiving affects the incoming-call-establishment procedure at the MAX unit.
According to ITU’s Q.931 specifications, the receiving unit can use either the en-bloc
receiving procedure or the overlap receiving procedure to handle the incoming call. If en-bloc
receiving is in use, the Setup message contains all the information required by the called user
for processing the call. But if the carrier supports overlap receiving, the received Setup
message might contain incomplete called-number information. After the network receives the
Setup Acknowledge message, it sends the remainder of the call information (if any) in one or
more Information messages. In this case, you must set the Overlap Receiving parameter to Yes
so that the unit can gather the complete called number from the network switch, thus enabling
the use of features such as called-number authentication.
Example of ISDN PRI configuration
Following is an example of T1 configuration for ISDN PRI service. (Only the relevant
parameters are shown.)
Net/T1
Line Config
Line Config profile
Name=
1st Line=Trunk
2nd Line=Disabled
Line 1...
Sig Mode=ISDN
Framing Mode=D4
Encoding=AMI
Send Disc=0
Overlap Receiving=Yes