Source note · Wrong or missing caller ID on outbound calls
A P-Asserted-Identity header carries at most two values, and if there are two, one must be a sip or sips URI and the other a tel URI.
Checked 2026-09-25
If there are two values, one value MUST be a sip or sips URI and the other MUST be a tel URI.
- Vendor
- IETF
- Product
- SIP
- Subsystem
- identity headers
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3325
- Checked
- 2026-09-25
Sources
- RFC 3325: Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks — IETF / RFC Editor · tier 1 standards and regulators · Section 9.1 (P-Asserted-Identity syntax)
Cite this note
APA
WarmTransfer. (2026, September 25). Wrong or missing caller ID on outbound calls: source note caller-id-presentation-problems-pai-max-two-values. WarmTransfer. https://warmtransfer.net/knowledge/claims/caller-id-presentation-problems-pai-max-two-values
BibTeX
@misc{warmtransfer-claim-caller-id-presentation-problems-pai-max-two-values,
title = {Wrong or missing caller ID on outbound calls: source note caller-id-presentation-problems-pai-max-two-values},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/caller-id-presentation-problems-pai-max-two-values},
note = {Source note caller-id-presentation-problems-pai-max-two-values, checked 2026-09-25}
}