ATA 190 with FAX

[zheepern0826]

Hi Experts,

Recently I installed ATA for fax maching purpose at my client side. It is working intermittently.  Sometimes it is working and sometimes it is not.

I have attached the profile created in the CUCM and below is the configuration from my ISR router.

voice service voip
 ip address trusted list
  ipv4 xxx.xxx.xxx.xxx
 gcid
 clid substitute name
 mode border-element
 allow-connections h323 to h323
 allow-connections h323 to sip
 allow-connections sip to h323
 allow-connections sip to sip
 supplementary-service h450.12
 no supplementary-service sip moved-temporarily
 no supplementary-service sip refer
 fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback pass-through g711ulaw
 sip
  min-se 600 session-expires 600
  session refresh
  header-passing
  localhost dns:xxx.net.sg
  no update-callerid
  midcall-signaling passthru
  no call service stop

Please advise if i have wrong configured..

Thank you very much in advance.

[Slavik Bialik · Accepted solution]

Try adding this CLI command on your VoIP dial-peers:

fax rate disable

I can't remember why, but it solved my fax issues every time.

[zheepern0826]

Hi Slavik,

I tried to googled around and see other people configure fax rate disable when they are using pass through. Can i check which protocol are you using ??

Currently i am using t.38 protocol. I am putting this fax protocol command under "voice service voip".  Should i put it under the incoming and outgoing dial-peers instead ? please advise.

Thank you.

[zheepern0826]

Hi,

One more question, do fax need open firewall ports ??

thanks