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Suchi
Beginner

ATA 190 with FAX pass throgh

HI 

 

I have setup faxes with ATA , below is the call flow

 

ATA--UCM--SIP TRUNK--CUBE---SIP TRUNK---ITSP

 

my ITSP doesn't support t.38 , so i configured fax pass throgh, but most of the time faxes fail, any suggestion?

 

fax rate disable
fax nsf 000000
fax protocol pass-through g711alaw

3 REPLIES 3
Mohammed al Baqari
VIP Advisor

remove fax nsf command and test.

Also, share debug ccsip mess for failed fax call

HI Mohammed,

 

Thanks for the suggestion & what is the impact if i use fax  protocol none?

 

 

No fax pass-through is attempted which you don't want. You need it to pass through

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