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Cisco Bug: CSCuo96911 - MGCP/CCM: Enhancement to advertise NSE caps in AUEP response

Last Modified

Nov 27, 2020

Products (104)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco 1803 Integrated Services Router
  • Cisco 861W Integrated Services Router
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 888W Integrated Services Router
  • Cisco 2951 Integrated Services Router
  • Cisco 881SRSTW Integrated Services Router
  • Cisco 1812 Integrated Services Router
  • Cisco VG224 Analog Voice Gateway
  • Cisco VG204 Analog Voice Gateway
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Known Affected Releases

15.1(4)M3 15.2(2)T1

Description (partial)

Symptom:
MGCP Gateways when sending AUEP response to CUCM doesn't advertise NSE capabilities.
Call Flow:
GW --> MGCP --> CUCM --> SIP --> GW

SIP Invite sent from CUCM to SIP GW, doesn't contain NSE capabilities in the SDP. Due to this, the SIP GW would never do a Fax/Modem switchover.

Conditions:
MGCP-SIP Call Flows
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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