Claim record · Webex Contact Center voice channel and PSTN options
Webex Contact Center's SIP interoperability requirements state SIP Early Offer is not supported (listed as a future roadmap item), SIP Delayed Offer is supported, and SIP Early Media is not supported (also a future roadmap item); the SDP packetization timer must be 20ms.
fact · verified 2026-09-04
SIP Early Offer: Not Supported ( future roadmap item )
- Vendor
- Cisco
- Product
- Webex Contact Center
- Subsystem
- Voice channel and PSTN
- Deployment
- cloud
- Region
- not restricted
- Release range
- current as of 2026-09-04
- Status
- fact
- Confidence
- 0.90
- Verified
- 2026-09-04
Sources
- Set up voice channels for Webex Contact Center — Cisco Systems, Inc. (Webex Help Center) · tier 2 current vendor documentation · PSTN Media and Signaling Requirements for Webex Contact Center subsection
Cite this claim
APA
WarmTransfer. (2026, September 4). Webex Contact Center voice channel and PSTN options: claim wxcc-vc-sip-early-offer-and-early-media-unsupported. WarmTransfer. https://warmtransfer.net/knowledge/claims/wxcc-vc-sip-early-offer-and-early-media-unsupported
BibTeX
@misc{warmtransfer-claim-wxcc-vc-sip-early-offer-and-early-media-unsupported,
title = {Webex Contact Center voice channel and PSTN options: claim wxcc-vc-sip-early-offer-and-early-media-unsupported},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/wxcc-vc-sip-early-offer-and-early-media-unsupported},
note = {Claim wxcc-vc-sip-early-offer-and-early-media-unsupported, verified 2026-09-04}
}