01-01-2014 01:15 AM
Dear All,
I need to configure fax service in as5350 and as I have basic knowledge about this issue , so I really appreciate If you provided me with detailed information.
fax machin-->as5350
I want to whenever I call to the Bnumber of the E1 , I hear the fax handshaking .
The Voip and Pots Dialpeer are configured with t38 fax and the fax rate 14400
but I couldn't here the fax tone . before I use fax server I need the cisco to make a Sip ack to the fax .
I don't know whether my question is crystal clear or not , but I just want to hear the fax tone ,
is it need a special modem for fax other than for the voice ?
08-07-2014 04:05 AM
Hi,
I have this problem too. I'm doing this not with SIP, but with H323. I did this many times on other Cisco gateways and it is working. I can send the fax from Fax server, but not to receive fax. I don-t get fax tone. There is some communication between gateway and fax server. The fax call get good dial-peer:
Gateway#show call active voice brief
<ID>: <start>hs.<index> +<connect> pid:<peer_id> <dir> <addr> <state>
dur hh:mm:ss tx:<packets>/<bytes> rx:<packets>/<bytes>
IP <ip>:<udp> rtt:<time>ms pl:<play>/<gap>ms lost:<lost>/<early>/<late>
delay:<last>/<min>/<max>ms <codec>
MODEMPASS <method> buf:<fills>/<drains> loss <overall%> <multipkt>/<corrected>
last <buf event time>s dur:<Min>/<Max>s
FR <protocol> [int dlci cid] vad:<y/n> dtmf:<y/n> seq:<y/n>
<codec> (payload size)
ATM <protocol> [int vpi/vci cid] vad:<y/n> dtmf:<y/n> seq:<y/n>
<codec> (payload size)
Tele <int>: tx:<tot>/<v>/<fax>ms <codec> noise:<l> acom:<l> i/o:<l>/<l> dBm
MODEMRELAY info:<rcvd>/<sent>/<resent> xid:<rcvd>/<sent> total:<rcvd>/<sent>/<drops>
speeds(bps): local <rx>/<tx> remote <rx>/<tx>
Proxy <ip>:<audio udp>,<video udp>,<tcp0>,<tcp1>,<tcp2>,<tcp3> endpt: <type>/<manf>
bw: <req>/<act> codec: <audio>/<video>
tx: <audio pkts>/<audio bytes>,<video pkts>/<video bytes>,<t120 pkts>/<t120 bytes>
rx: <audio pkts>/<audio bytes>,<video pkts>/<video bytes>,<t120 pkts>/<t120 bytes>
Telephony call-legs: 1
SIP call-legs: 0
H323 call-legs: 1
MGCP call-legs: 0
Total call-legs: 2
1276 : 51426292hs.1 +-1 pid:8887 Answer 113012253 connected
dur 00:00:00 tx:0/0 rx:0/0
Tele 3/0:D:357: tx:0/0/0ms None noise:0 acom:0 i/0:0/0 dBm
1276 : 51426293hs.1 +-1 pid:900 Originate 8887 connecting
dur 00:00:00 tx:0/0 rx:0/0
IP 0.0.0.0:0 rtt:0ms pl:0/0ms lost:0/0/0 delay:0/0/0ms g711ulaw
Telephony call-legs: 1
SIP call-legs: 0
H323 call-legs: 1
MGCP call-legs: 0
Total call-legs: 2
Can anybody help me?
Jasmina
08-11-2014 11:25 PM
Hi, if T.38 is not a must, try to disable it. Fax passthrough has less interop issues.
dial-peer voice 101 voip
description Inbound_call
...
modem passthrough nse codec g711alaw
voice-class codec 10
session target ras
dtmf-relay rtp-nte
fax protocol pass-through g711alaw
fax rate disable
no vad
If you want to test T.38, this is my config:
dial-peer voice 100 voip
description T.38
....
dtmf-relay h245-alphanumeric
codec g711alaw
fax-relay ecm disable
fax rate 14400
fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback pass-through g711alaw
no vad
Also, check IOS version. I suggest at least a 12.4.
Regards.
08-14-2014 06:09 AM
Hi Daniele,
Thanks for this. I just change H323 to SIPv2 and all start to work. I will use SIP on this project, but I will have this in mined for some new installation.
Regards
Jasmina
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