Ensure that the system is running Communication Manager Release 6.0 or later. Release 6.0 or later is required on all nodes that participate in Q-SIP calls. The nodes can be originating, tandem, or terminating.
Procedure
Enter display system-parameters customer-options.
Click Next until you find the Maximum Administered IP Trunks field.
Ensure that the Maximum Administered IP Trunks field is set to greater than 1 and include enough trunks for Q-SIP trunk group use.
Click Next until you find the Maximum Administered SIP Trunks field.
Ensure that the Maximum Administered SIP Trunks field is set to greater than 1 and include enough trunks for Q-SIP trunk group use.
Scroll through the screens to find the IP Trunks field.
Ensure that the IP Trunks field is set to y.
Note:
If the Maximum Administered IP Trunks and Maximum Administered SIP Trunks fields are set to less than 1, or the IP Trunks field is set to n, your system is disabled for the QSIG over SIP feature. Go to the Avaya Support website at http://support.avaya.com for assistance.