[cisco-voip] Rightfax T.38 issues

[Vince Loschiavo]

According to the Cisco Fax Server Installation Guide-Supplement.pdf:
 
mgcp fax rate 14400
mgcp fax t38 inhibit
 
check your clocking....
look for slips - > "show controller t1" 
Slips would be indicative of network clock/timing issues.
 
____________________________________________________________
Vincent Loschiavo
Senior Consultant
Datacorp
18503 Pines Blvd
Suite 212
Pembroke Pines, FL, 33029

"Cisco Advanced Unified Communications Partner"
Cell Phone:        786-282-1164
Office Phone:    305-594-6933
____________________________________________________________ 
 

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Kris Seraphine
Sent: Monday, April 16, 2007 2:49 PM
To: cisco-voip at puck-nether.net
Subject: [cisco-voip] Rightfax T.38 issues


Hi

I have a customer who's recently installed a rightfax server into their
network. I've configured their H.323 gateway for T.38.  Inbound faxes
seem to work fine but outbound faxes fail about 90% of the time.  I
thought it may be a super G3 issue but unfortunately the gateway does
not have enough flash to load the 12.4(T) image.  While we're waiting
for a flash upgrade I asked the customer to work with rightfax on the
issue.  They haven't been all that helpful but they did disable V.34 and
verified that the compression method was set to group 3.  To me this
should mean the rightfax server should negotiate 14.4k and any super G3
fax machine would train down to that level.  Am I correct in this
assumption?  

If so, I'm not sure what would be causing the problems.  the T1
controller and ethernet interface show no errors.  I can tell from the
debug output that the correct dialpeers are being matched and that the
DSP is downloading the fax codec for these calls but the outbound faxes
seem to always fail after the first page is sent.  

For my dialpeers I have the fax protocol t38 ls-redundancy 0
hs-redundancy 0 fallback none and fax-relay ecm-disable commands.  The
gateway is a 2651XM using the voice aim and a VWIC-MFT-T1 card.  It is
currently running 12.3(11)T11

any thoughts or suggestions would be appreciated. 

-- 
kris seraphine 
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