Source note · Passing call context with SIP UUI and custom headers
Genesys Cloud imposes no character limit on a UUI string but recommends 128 characters or fewer because some systems discard longer data.
Checked 2026-10-02
The best practice is to limit UUI data to 128 characters or fewer.
- Vendor
- Genesys
- Product
- Genesys Cloud
- Subsystem
- Architect
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Set UUI Data action — Genesys · tier 2 current vendor documentation · Paragraph on UUI length
Cite this note
APA
WarmTransfer. (2026, October 2). Passing call context with SIP UUI and custom headers: source note sip-uui-context-passing-genesys-128-char-guidance. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-uui-context-passing-genesys-128-char-guidance
BibTeX
@misc{warmtransfer-claim-sip-uui-context-passing-genesys-128-char-guidance,
title = {Passing call context with SIP UUI and custom headers: source note sip-uui-context-passing-genesys-128-char-guidance},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-uui-context-passing-genesys-128-char-guidance},
note = {Source note sip-uui-context-passing-genesys-128-char-guidance, checked 2026-10-02}
}