I can't hear music bell instead of ring backtone between G/W and CM
There is something wrong with my voip network.
I have callmanager(4.1) and Voice G/W(cisco2600).
When i try to make a call from IP Phone(7940) to Cellular Phone, I can't hear music bell. music bell is seviced by mobile telecommunication company. so if i make a call from PSTN Phone, i can hear music bell instead ring back tone.
anyway, if i try to make a call from PSTN's phone, i can hear music bell but not from IP phone.
Re: I can't hear music bell instead of ring backtone between G/W
You have 2 different signalling protocols that are communicating: H323 and ISDN and the difficulty with H323 on most Cisco routers is the inability to translate signalling and setup between disparate Telco ISDN switches, as there are many different brands and types of ISDN switches used at the CO, with various types of signalling capabilities. Therefore, the 2 entities (ISDN switch and Cisco H323 gateway) must establish communication by use of "progress tones," which are in-band tones such as busy signal, ring tone, and announcements across the 2 different protocols by the use of, what is called an Information Element or IE for short. This IE stores the Progress message, but some device along the way DOESN'T recognize it, so by using the progress_ind command for various Progress signals, (such as the alert, which is the one you used...) you are bypassing the intermediate devices that may NOT recognize and forward the Progress signal and allowing it to hit the H323 gateway directly....
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