Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

fax configuration on as5350

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 ?

Everyone's tags (3)
3 REPLIES
New Member

Hi, I have this problem too.

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

Hi, if T.38 is not a must,

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.

New Member

Hi Daniele, Thanks for this.

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

597
Views
0
Helpful
3
Replies