Set-CsOnlinePSTNGateway (MicrosoftTeams)

Publisher

Microsoft

URL

https://learn.microsoft.com/en-us/powershell/module/microsoftteams/set-csonlinepstngateway

Published

2026-04-27

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

Microsoft Learn terms of use (CC BY 4.0 for docs content repository); no-redistribution; short excerpts and locators only

Source notes citing this source

• Failover triggers are not uniform across hops: RFC 3263 fails over on 503, transport failure or timeout; Teams defaults to 408/503/504 plus a 10-second timer; Twilio origination uses a 4-second no-response rule with an exclusion list; CUCM OPTIONS ping treats 408/503 as down. End-to-end failover time therefore has to be measured per hop rather than assumed. inferred in context
• Setting -Enabled $false on an online PSTN gateway drains it: existing calls continue and new calls go to another SBC in the route if one exists. A newly created gateway defaults to disabled. in context
• The default FailoverResponseCodes on a Teams online PSTN gateway are 408, 503 and 504, and setting the parameter overwrites the defaults rather than adding to them. in context
• FailoverTimeSeconds defaults to 10: outbound calls the gateway does not answer within that time are routed to the next available trunk, and dropped if there is none. in context
• SendSipOptions defaults to True; if disabled, the SBC is excluded from the Direct Routing monitoring and alerting system, and Microsoft highly recommends leaving SIP options enabled. in context
• GatewaySiteLbrEnabled (Boolean, default False) makes the SBC report its assigned site; on an incoming call the SBC's site is compared with the user's site to make the routing decision, and the parameter is mandatory for enabling LBR. in context
• The Set-CsOnlinePSTNGateway parameter GatewayLbrEnabledUserOverride is a Boolean with default False; it lets an LBR-enabled user outside the corporate network, or at an on-network location not configured as a tenant network site, make and receive PSTN calls through an LBR-enabled gateway. in context

Cite this source record

APA

WarmTransfer. (2026, April 27). Set-CsOnlinePSTNGateway (MicrosoftTeams). WarmTransfer. https://warmtransfer.net/knowledge/sources/ms-learn-set-csonlinepstngateway

BibTeX

@misc{warmtransfer-ms-learn-set-csonlinepstngateway,
  title  = {Set-CsOnlinePSTNGateway (MicrosoftTeams)},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/ms-learn-set-csonlinepstngateway},
  note   = {Microsoft, accessed 2026-09-25}
}