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ATA 190 Fax send issue

Ed Kender
Beginner
Beginner

Hello - we continue to have problems sending faxes through ATA 190's.  We have success with receive but send continues to be an issue.  We use T.38 and eventually will be going to an ITSP for centralized trunking but currently use PRI.  This is the flow ATA190 > SIP>CUCM>SIP>PSTN GW>PRI.  Below are the steps we have taken.

CUCM: 10.5.2

ATA 190: 1.2.2 (003)

  1. Set T.38 in CUCM
  2. Disable ECM in CUCM
  3. GW config
    • global config: fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback pass-through g711ulaw
      h323
    • modem passthrough nse codec g711ulaw
    • Inbound VOIP dial peer
      • fax-relay ecm disable
        fax-relay sg3-to-g3
        fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback pass-through g711ulaw
  4. Set baud rate to 14,400 on the fax and disable ECM

Please let me know what we can try to resolve the issue.

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