[cisco-voip] Single PRI with multiple virtual trunk groups

[Heim, Dennis]

I am guessing you would need some adtran magic. Sounds interesting… ;-).

Dennis Heim | Emerging Technology Architect (Collaboration)
World Wide Technology, Inc. | +1 314-212-1814
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From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Justin Steinberg
Sent: Wednesday, January 28, 2015 4:22 PM
To: Cisco VOIP
Subject: [cisco-voip] Single PRI with multiple virtual trunk groups

Has anyone heard of splitting a single PRI into multiple virtual trunk groups ?    Not splitting the B channels into two trunk groups, but creating a virtual trunk group on the D channel.

When an outbound call is sent out the PRI, Cisco would specify which virtual trunk group is being used and this would be sent in the D Channel message.

The use case is around E911/PSALI and DID screening ranges.  We want to have the telco remove the screening range, but they said it isn’t possible with their CO switch since we are also using E911/PSALI.    The workaround the Telco provided was to create two virtual trunk groups, one for E911/PSALI and one for no screening range.   911 calls would need to route out the PSALI virtual trunk group and all other calls out the other virtual trunk group.

I’ve never heard of this in Cisco land.  Any ideas?
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