On 28/12/2012 1:55 AM, Eric Wieling wrote:
We are offering $100 (paid via paypal or check) to the first person who assists
us in successfully sending and receiving faxes in the setup described below.
Offer expires Dec 31. We are a direct customer of Level 3, there is no other
carrier involved.
What we want to work:
Level 3 T.38 TN <-> MSX/Nextone SBC <-> Asterisk 1.8.18.1 <-> Adtran
NetVanta w/POTS and T.38 support.
When we replace Asterisk with Kamailio faxes work fine. When we put Asterisk
there instead, then faxes fail nearly 100% of the time.
I see the switch to T.38 in the Adtran debug logs. We can originate and
terminate T.38 calls in Asterisk using SendFax/ReceiveFax using T.38 so I'm
assuming I have my udptl.conf and sip.conf settings correct.
In udptl.conf try the following option
;
; Some VoIP providers will only accept an offer with an even-numbered
; UDPTL port. Set this option so that Asterisk will only attempt to use
; even-numbered ports when negotiating T.38. Default is no.
use_even_ports = yes
;
Looking at some old notes other options I set for some devices to be
able to pass through T.38 in sip.conf were,
directmedia=no
t38pt_udptl=no
May be worth checking the following;
directrtpsetup=no
Larry.
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