[cisco-voip] Dialpeer Hunting and Preference

[Walenta, Phil]

You could probably fix this using a gatekeeper and CAC.  By setting a
CAC value for each site of 4 calls, in theory the GK should know to try
the next available site for that number when the first site is out of
bandwidth. 

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of John Gao
Sent: Thursday, April 21, 2005 4:02 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Dialpeer Hunting and Preference

Hi All,

A customer has two sites.  Both sites have a 827-4V.  Inbound PSTN calls
are terminated on an AS5350.  Customer wants to route calls to site A
first.  If all lines on site A are busy, then subsequent calls are to be
routed to site B.

PSTN External <-> AS5350 <-----> CPE 827-4V (A)
                             |
                             |----------> overflow CPE 827-4V (B)

It sounded easy, but we found out that when all lines on site A are
busy, the 827-4V sends a user-busy signal back to the AS5350, so that
the AS5350 gives up and sends a busy tone to the PSTN.

We are reluctant to use the 'voice hunt user-busy' on the AS5350 as it
affects other business and customers.  Is there something similar to
tell the AS5350 to re-route the calls?

Relevant dial-peer config below:

dial-peer voice 2678 pots
  incoming called-number 88882678
  direct-inward-dial
!
dial-peer voice 26781 voip
  preference 1
  max-conn 4
  destination-pattern 88882678
  session target ipv4:<cpe a>
!
dial-peer voice 26782 voip
  preference 3
  destination-pattern 88882678
  session target ipv4:<cpe b>
!

We opened a case with TAC but was told that it is 'not possible and thus
outside the scope'.

TIA

John Gao
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