Source note · Calls that drop after about 30 seconds
RFC 6314, an Informational RFC from July 2011, assumes NATs without SIP-aware ALGs. It notes that ALGs have limits, including needing signaling and media to pass through the same device and failing with encrypted signaling.
Checked 2026-09-25
- Vendor
- IETF
- Product
- SIP
- Subsystem
- NAT traversal / ALG
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 6314
- Checked
- 2026-09-25
Sources
- RFC 6314: NAT Traversal Practices for Client-Server SIP — IETF / RFC Editor · tier 1 standards and regulators · Section 3
Cite this note
APA
WarmTransfer. (2026, September 25). Calls that drop after about 30 seconds: source note sip-calls-drop-30-seconds-rfc6314-no-alg-assumption. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-calls-drop-30-seconds-rfc6314-no-alg-assumption
BibTeX
@misc{warmtransfer-claim-sip-calls-drop-30-seconds-rfc6314-no-alg-assumption,
title = {Calls that drop after about 30 seconds: source note sip-calls-drop-30-seconds-rfc6314-no-alg-assumption},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-calls-drop-30-seconds-rfc6314-no-alg-assumption},
note = {Source note sip-calls-drop-30-seconds-rfc6314-no-alg-assumption, checked 2026-09-25}
}