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Cisco Bug: CSCum13351 - TC software DefaultTransport set to auto only tries TLS, not TCP or UDP

Last Modified

Nov 27, 2020

Products (17)

  • Cisco Telepresence Integrator C Series
  • Cisco TelePresence Codec C60
  • Cisco TelePresence System Profile 52-inch
  • Cisco TelePresence System Profile 65-inch Dual
  • Cisco TelePresence System Profile 42-inch
  • Cisco TelePresence Codec C40
  • Cisco TelePresence System Integrator Package C40
  • Cisco TelePresence System Integrator Package C60
  • Cisco TelePresence MX200
  • Cisco TelePresence System Profile 52-inch Dual
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Known Affected Releases

6.3.x 7.0.1

Description (partial)

An endpoint running TC software when registered non-secure using SIP and the default transport (DefaultTransport) is set to auto will not be able to place calls.  The call history displays "NetworkRejected" for the disconnect cause type.

The SIP DefaultTransport setting is set to auto and the endpoint is registered non-securely.  The endpoint will attempt a call by trying to setup TLS only (TCP port 5061) and not fallback to TCP and/or UDP as the admin guide states for the auto setting: "Auto: The system will try to connect using transport protocols in the following order: TLS, TCP, UDP.

This only occurs when the provisioning type is set for CUCM because the endpoint configuration settings should be learned from the TFTP configuration from downloaded from CUCM and should not be manually edited.
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