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Community Member

Problem with call transfer

I have two sites

Site A: I have digital phones hanging off a Fujitsu 9600 PABX. This is then connected to a Cisco AS5300 gateway with IOS c5300-js-mz.121-3a.XI2.bin.

Site B: I have IP phones and Call Managers 3.1 with a 3725 gateway using IOS c3725-is-mz.122-13.T.bin.

The situation is if site A digital call site B IP phone everything is OK. Site B then transfer (or call forward all) to an external mobile number via the 3725 gateway with an E1 connection, the call just dropped.

I have tested routing between the two gateways and everything is OK.

Anybody come across this problem before or know whether IOS on the two gateways are OK.

Thanks

3 REPLIES
Anonymous
N/A

Re: Problem with call transfer

You have to check the CODEC in inbound and outbound call transfer. If there is a mismatch the call will fail.

Also check for the Media Termination Point Configuration MTP setting on the Call Manager under the gateway settings i.e the route-point will point

to a gateway to send Calls To the GSM

More information of MTP can be found at :-

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/3_2/sys_ad/3_2_1/ccmcfg/b04mtp.htm

http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/3_1/sys_ad/adm_sys/ccmcfg/b04mtp.htm#

20364

Community Member

Re: Problem with call transfer

I like to ask how can I check the CODEC for inbound and outbound call transfer?

I thought with H323 v2 there is no need to create MTP to provide supplementary services. Is this correct?

Anonymous
N/A

Re: Problem with call transfer

The codec for inbound and outbound call transfer can be found using the command

show dial-peer voice

show call active voice brief | compact

if it is an mgcp call you can use

show rtp call or in general u can use show rtp connection

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