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No ringback in a QSIG connection to an Ericsson MD-110 PBX

I have a E1 controller in a 2610XM gateway connected to a MD-110 PBX, configured with QSIG signaling. The problem is that I am not receiving the ringback in the IP phones (no problem in the phones connected to MD-110). Same router with same configuration connected to Siemens HiPath works fine.

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Re: No ringback in a QSIG connection to an Ericsson MD-110 PBX

I am assuming the call is made from IP Phone and it is not receiving ringback. In this case IP Phone expects inband ringback tones and either Ericsson MD-110 PBX or Cisco GW is not cutting through the voice path. I guess Ericsson PBX is not providing the ringback and you may need to configure "progress_ind" commands under dial-peer to enable the 2610 GW to provide the ringback tone. Refer this URL for exact configurations.

http://www.cisco.com/en/US/tech/tk652/tk701/technologies_tech_note09186a0080094c33.shtml#voipcalls

The following document talks about MD110 and 2600 interoperabilty.

http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis2600/sw_conf/pbx_int/26emde1p.pdf

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