[cisco-voip] isdn channels full message

Wes Sisk (wsisk) wsisk at cisco.com
Tue Jun 23 11:47:52 EDT 2015


not tested, theoretically sound, YMMV. No guarantees, warranties, etc.

use a route group with top down hunting. your real gateways are the first entries.
last entry is an h323 gateway. the destination IP is the local CM. This is essentially a loopback going out/in the IP interface.
Use the CSS for that gateway to match translation patterns that overwrite the called party number to be the DN that forwards to Voicemail. Also use a different egress CSS for the TP.
Setup your VMail system to answer based on that redirect number and deliver whatever message you want.

-w

On Jun 23, 2015, at 9:15 AM, Ryan Huff <ryanhuff at outlook.com<mailto:ryanhuff at outlook.com>> wrote:

Ahhhhh okay ....

Well, an easy way would be MGCP Gateways and route groups (and just mux the timers to get quick failover). With H.323 however, that is a bit more tricky because CCM knows nothing about the gateway or PRI's state, so if you could do anything, it would have to be in the gateway.

You can use hunt groups in an h.323 IOS gateway to do this with multiple PRI's; you may be able to do this by having one of the peers in the hunt group kick the call back into CCM to a destination that forwards to voicemail.

Thanks,

Ryan


________________________________
From: abbaseo at gmail.com<mailto:abbaseo at gmail.com>
To: ryanhuff at outlook.com<mailto:ryanhuff at outlook.com>; cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: RE: [cisco-voip] isdn channels full message
Date: Tue, 23 Jun 2015 13:55:42 +0100

Hi just to add it to.



We need it only for the outbound direction.



From: Ryan Huff [mailto:ryanhuff at outlook.com]
Sent: 23 June 2015 13:51
To: abbas wali; cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: RE: [cisco-voip] isdn channels full message



I don't believe so, at least not on the CPE side.

The presence of all channels being busy would indicate that there aren't any channels available for the next call (or the next call after all channels are busy) to ring through the PRI for you to forward to voicemail, even if there were a way for you to act upon channel utilization.

If you are trying to use conditional routing based on full PRI capacity, you'd probably have to work with your carrier and see if they can forward upon full channel utilization (they have the capability to do that, but will they is the question). However, they wouldn't be able to forward through the utilized PRI in that scenario, they'd have to forward to an alternate number.

Thanks,

Ryan
________________________________
From: abbaseo at gmail.com<mailto:abbaseo at gmail.com>
To: cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Date: Tue, 23 Jun 2015 11:38:55 +0100
Subject: [cisco-voip] isdn channels full message
Hi  folks,



CUCM 9 and H323 gateways with ISDN channels to PSTN. We want to redirect to VM when all the channels are full.



Can CUCM do it or Dpeer?



Thanks



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