Dears we have this Call flow  Cisco IP Phone-SIP (4271)----CUCM 11.5 ----H323 VGW--h323--PANASONIC(IP PBX)---Analog Phone (4334) Issue : Call not working from Cisco Phone to Panasonic , when we try we get busy tone. please check attached logs from H323 CGW and sunning Config on this GW. Please note this GW configured as Faststart On cucm Thanks ... View more

Dears  I have these scenarios with different result   1- 1st scenario  (Conference success) IP Phones ----CUCM----SIP GW---PRI----PSTN IP Phone A (Region A)  has call with IP Phone B (Region B) using g729 codec for this call , then make conference with PSTN Number using codec g729 and conference success . 2- 2st scenario  (Conference failed) IP Phones  ----CUCM----H323 GW-------Avaya PBX IP Phone A (Region A)  has call with IP Phone B (Region B) using g729 codec for this call , then make conference with Avaya  Extension using codec g729 and conference failed Please note that Calls between any IP Phone and Avaya extension use g729 Codec. All IP Phones has MRGL with conference bridge and transcoder H323 VG between CUCM and Avaya has MTP required. 3-3rd scenario  Phone A  has call with PSTN number using Codec g729 then try to make conference with avaya extension but Conf failed. Please check attached  sdl FILES FOR third scenario  Phone A number is 6668 PSTN number is 01018868XXX Avaya Extenstion  962 Please Advice ... View more

we have ring back tone issue with below scenario  PSTN -----PRI (E1)----SIP VGW--- SIP trunk-----CUCM----SIP TRUNK-----CUC(AA)---Transferred Calls to Internal IP Phone. When incoming call trough above scenario and Transferred  by Unity AA to internal extension , Caller not get ring back tone . Our action 1-Enable PRACK on SIP trunk between GW and CUCM also on SIP TRUNK between CUCM and CUC 2-Enable PRACK on Voice Gateway which enabled by default  Result : Same issue  Kindly check SIP VGW logs below  debugs debug voip ccapi inout debug ccsip message ... View more

Dears  We plane to register Cisco Phone 7821 through MRA (Expressway Solution) , As Cisco doc , we have to signed expressway edge with one of public certs which trusted  by this phone. Our Workaround  was to create CA roots certs using Open ssl with same attributes of one of Public certs that phone trusted , then generate CSR request of expressway core and edge to be signed by this new certs. But Phone 7821 failed to register with same error message "Invalid Certificate  " but jabber works fine. Now we plan to sign expressway edge and core with one of Public Certificate seller so what is info ,we have to  provide Public Certificate Issuer  with it to get correct certificate . I think we have to provide them  1- CSR requests from EXP Edge and Core 2- need to sigh this certs by SERVER-Client Template 3- provide them Public Certificate doc which 7842 phone trusted and use one of them  These info enough or not ?? Also now expressway solution in production for Jabber remote use , we need to know that if we generate CSR request from expressway edge and core , will this has effect on UC traversal zone between EXP edge and core ?? Thanks  ... View more