I have a RightFax connected to a CUCM v6 through a SIP trunk. VGs are configured for T38 with fallback cisco protocol. Some faxes are connected directed on FXS on VG, and controlled by CUCM via STCAPP service protocol. OK: from RightFax --> Fax Rx/Tx to/from PSTN work OK. PROBLEM: from RightFax --> Fax Rx/Tx to/from STCAPP fax cannot negotiate T38 (see attached wireshark trace: not acceptable media) Here is the config: stcapp register capability 0/3/0 both stcapp ccm-group 1 stcapp voice class codec 1 codec preference 1 g711alaw codec preference 2 g711ulaw voice-port 0/3/0 cptone CH timeouts ringing infinity caller-id enable dial-peer voice 415800 pots service stcapp port 0/2/0 dial-peer voice 415801 voip description TEST T38 preference 1 voice-class codec 1 incoming called-number 415800 fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback cisco no vad WORKAROUND: I managed to send fax by forcing the CUCM to reroute to the VG via H323, by inserting a new route pattern (9.415800 predot) and a creating an additional dial-peer on the VG: dial-peer voice 415802 pots preference 1 destination-pattern 415800 port 0/2/0 --> SUCCESS !! T38 is negotiated correctly --> Does anyone having an idea of what can cause this problem ? --> Does anyone having succeeded in making T38 call to STCAPP controlled fax in a similar set-up ? ... View more

Having 2 kinds of analog lines from different provider: 1. "WORKING" national/international --> the following VG config works well, signaling frequency have been measured to set-up accordingly. NO PROBLEM! voice class custom-cptone EG-Giv dualtone busy frequency 1415 1820 cadence 200 300 200 300 dualtone disconnect frequency 450 cadence 250 250 voice-port 0/1/2 trunk-group AnalogTrunk2-EgyptTelecom-OutInt supervisory disconnect dualtone mid-call supervisory answer dualtone no battery-reversal cptone EG connection plar 2761400 impedance complex2 description <REMOVED> station-id number <REMOVED> caller-id enable 2. "NOT WORKING" mobile --> Cannot find a proper configuration, symptom for outgoing AND incoming calls: DIALING STATE --> RINGING STATE --> CONNECT STATE (and call is disconnected) After line measurements, state voltage are the following: Call Cycle in DC voltages On-hook state 48V Ringing state -38V 38 V in 1st ring, then 0V then 38V starting from the second ring onwards Answered state -11V Disconnect state 11V voice-port 0/2/2 trunk-group AnalogTrunk3-EgyptTelecom-OutMob battery-reversal cptone EG connection plar 2761400 impedance complex2 description <REMOVED> station-id number <REMOVED> caller-id enable --> Tested with & without "battery-reversal", but did not help. According to voltage change, "reverse polarity" as stated by telco provider should be translated to battery-reversal ??? --> Found Cisco doc but did not help: http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800ae2d1.shtml Anyone face similar problem ? (IOS version: 124-20.T) Any idea to get it working ??? PS: the line is known to be working as it was primarily connected to TDM PBX ... View more

Have a 0.X route pattern using OverlapSending. Everything works OK for PSTN calls. But when trying to CFwdALL to a PSTN destination is impossible, the diverted number is accepted straight away after 2nd digits. ... View more