SIP Gateway requires TCP port 5061 to be open towards the IP ranges 52.112.0.0/14 and 52.122.0.0/15, and the firewall rules are needed for outbound traffic only.
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Microsoft Teams SIP Gateway
- Subsystem
- network
- Deployment
- multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Configure SIP Gateway — Microsoft · tier 2 current vendor documentation · Configure SIP Gateway > Before you can configure SIP Gateway > Open the TCP port; Open your firewall to Microsoft 365 and Teams
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-tcp-5061. WarmTransfer. https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-tcp-5061
BibTeX
@misc{warmtransfer-claim-teams-sip-gateway-troubleshooting-tcp-5061,
title = {Troubleshooting phones signing in through Teams SIP Gateway: source note teams-sip-gateway-troubleshooting-tcp-5061},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/teams-sip-gateway-troubleshooting-tcp-5061},
note = {Source note teams-sip-gateway-troubleshooting-tcp-5061, checked 2026-10-02}
}