Bandwidth recommends setting the T.38 MaxDatagram to 176.

Checked 2026-10-02

we recommend making sure your MaxDatagram is set to 176
Vendor
Bandwidth
Product
Bandwidth SIP trunking
Subsystem
T.38
Deployment
multi-tenant
Region
us
Release range
current as of 2026-10-02
Checked
2026-10-02

Sources

Cite this note

APA

WarmTransfer. (2026, October 2). Troubleshooting fax over IP failures: source note fax-over-ip-troubleshooting-bw-maxdatagram-176. WarmTransfer. https://warmtransfer.net/knowledge/claims/fax-over-ip-troubleshooting-bw-maxdatagram-176

BibTeX

@misc{warmtransfer-claim-fax-over-ip-troubleshooting-bw-maxdatagram-176,
  title  = {Troubleshooting fax over IP failures: source note fax-over-ip-troubleshooting-bw-maxdatagram-176},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/fax-over-ip-troubleshooting-bw-maxdatagram-176},
  note   = {Source note fax-over-ip-troubleshooting-bw-maxdatagram-176, checked 2026-10-02}
}

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