How do I configure callmanager or GW H323 to offer busy tone to carrier?

Unanswered Question
Jul 8th, 2009

When our faxes receive a second call while busy, the second call overflows to our POTS lines. According to the carrier that happens becuase we are sending a cause code 17 to them which triggers the overflow feature over our ISDN Pri lines. Per the carrier to avoid triggering the overflow we need to send a cause code 31, or some release alert to not trigger the overflow.

In accordance with Cisco TAC the cause code cannot be changed on an H323 GW.

Is there a way to configure callmanager or the GW H323 with a work around that will either send a busy signal to the carrier, or have the system provide a busy signal on the second line?

I have this problem too.
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guy.richard Thu, 07/09/2009 - 00:24


Which type of H323 gateway are your faxes connected to ?

Did you configured "hunt-stop" on your pots dial-peers to prevent to overflow

Maybe you can add "max-conn 1" command on either voip dial-peers.

Hope that helps


chavez.israel Thu, 07/09/2009 - 15:58

Thank you for taking your time to help me.

Use ATA's, connected to VG224's. Our PRI's are on 2851's...


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