What is it?
Webex Calling Local Gateway (LGW)
RoleBridges on-premises telephony (PSTN/UCM) with the Webex Calling cloud
PlatformCisco CUBE (IOS XE) or validated third-party SBC
SignalingSIP over TLS
MediaSRTP
PSTN modelByoPSTN: reuse your existing PSTN connection
MigrationGradual: coexist with on-prem UCM during transition
Prerequisites
- VoIP knowledge - SIP, media protocols, basic troubleshooting
- SBC familiarity - device platform being configured as LGW
- Required licenses - to operate the SBC platform
- On-prem UCM or PBX - if integrating with an existing environment