Source note · SIP 503 and trunk out-of-service failures
On AudioCodes Mediant SBC, the Proxy Set parameter Keep-Alive Failure Responses lists up to three SIP response codes that, if received in reply to keep-alive messages, make the device treat the proxy as offline.
Checked 2026-09-25
- Vendor
- AudioCodes
- Product
- Mediant SBC
- Subsystem
- Proxy Set keep-alive
- Deployment
- on-premises, cloud-hosted
- Region
- not restricted
- Release range
- User's Manual 7.4
- Checked
- 2026-09-25
Sources
- Configuring Proxy Sets - Mediant Software SBC User's Manual Version 7.4 — AudioCodes · tier 2 current vendor documentation · Proxy Sets table, parameter 'Keep-Alive Failure Responses'
Cite this note
APA
WarmTransfer. (2026, September 25). SIP 503 and trunk out-of-service failures: source note sip-503-trunk-failures-ac-failure-responses. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-503-trunk-failures-ac-failure-responses
BibTeX
@misc{warmtransfer-claim-sip-503-trunk-failures-ac-failure-responses,
title = {SIP 503 and trunk out-of-service failures: source note sip-503-trunk-failures-ac-failure-responses},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-503-trunk-failures-ac-failure-responses},
note = {Source note sip-503-trunk-failures-ac-failure-responses, checked 2026-09-25}
}