01-05-2015 04:24 AM - edited 03-17-2019 01:28 AM
Hi there,
This is Midhun and I'm VOIP engineer in Saudi Arabia. We have a SIP Trunk from a service provider. SIP Trunk and IPT is working fine.
I have a newly setup Imagicle Stone fax server here and in comming fax is working fine in the fax server but outgoing fax is not working.
Call flow --
FAX SERVER -- CUBE(2921 VG) -- SIP TRUNK(from Telco)
I have checked the logs and it seems FAX call is successful with normal call clearing and T38 Negotiation is also successful.
Attached is the Gateway configuration and the logs. Please help in fixing the outgoing fax issue.
Solved! Go to Solution.
01-08-2015 03:22 PM
Hello,
Just some insight in to the possible issue. Most SIP providers, for T.38, do not use NSE, they use protocol based failover. For this reason I recommend the following change in the gateway configuration:
old:
voice service voip
fax protocol t38 nse version 0 ls-redundancy 5 hs-redundancy 2 fallback pass-through g711alaw
new:
voice service voip
fax protocol t38 version 0 ls-redundancy 2 hs-redundancy 0 fallback pass-through g711alaw
See this page for further info:
Thanks!
Ryan
01-08-2015 03:22 PM
Hello,
Just some insight in to the possible issue. Most SIP providers, for T.38, do not use NSE, they use protocol based failover. For this reason I recommend the following change in the gateway configuration:
old:
voice service voip
fax protocol t38 nse version 0 ls-redundancy 5 hs-redundancy 2 fallback pass-through g711alaw
new:
voice service voip
fax protocol t38 version 0 ls-redundancy 2 hs-redundancy 0 fallback pass-through g711alaw
See this page for further info:
Thanks!
Ryan
01-10-2015 12:34 AM
Hi Ryan,
I'll try this.
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: