Gateway Bearer Capability

philippe.blasutto · ‎10-01-2008

I had used the workaround available in 4.2 version of callmanager to change the bearer capability from speech to 3.1khz for fax tramnsmission over ISDN/GSM.

The workaround is to add the following text in the description of the gateway.

##BC=3.1kHz##

Unfortunly this hack seems not working in version 6.X.

Does it exists an other way to change the bearer capability of a call ?

wdrootz · ‎10-08-2008

You may try using the bearer-cap command in voice-port configuration mode to set the gateway for speech or 3100 hz audio as appropriate

MARTIN STREULE · ‎10-09-2008

Maybe the "isdn reject vod" command helps you solving the issue. (Interface command)

/Martin

philippe.blasutto · ‎10-09-2008

No, I need this functionality in outbound to be able to send faxes over GSM network. The GSM gateway need a 3.1kzh bearer and is rehjecting the speech bearer. I tested it on callmanager version 6.1 and this workaroung is no more possible.

MARTIN STREULE · ‎10-09-2008

Maybe the "bearer-cap" command mentioned in the other post helps you.

But if this comes directly from the CUCM you're pretty lost.

- open PDI case (maybe they know another workaround)

- open TAC SR

- consider alternatives... H323, additional port for this function.

I did not know the workaround you mentioned. Always interesting. It's a pity that they disappear without a follow-up solution.

Good luck,

Martin

philippe.blasutto · ‎10-09-2008

It could be for an H323 gateway, but I would like to use it for an uplink to a VOIP carrier throught a SBC. And it does not solve the call by call choice of bearer.

Thank you for your suggestions.