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Appendix B - Known Incompatible VoIP Providers
The Vertex is incompatible with the following VoIP providers since they do not communicate using
standard, unencrypted SIP signaling.
List as of Jan 1, 2018
RingCentral
- Belmont, CA
Shoretel, Inc.
- Sunnyvale, CA (acquired by Mitel in 2017)
Mitel Networks
- Ottawa, Canada