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Cisco Bug: CSCul24898 - 8900/9900 Series IP Phone Sends malformed FROM header in SIP REGISTER

Last Modified

Nov 27, 2020

Products (1)

  • Cisco Unified IP Phones 9900 Series

Known Affected Releases


Description (partial)

8900/9900 IP phone unregisters after ending a call and will not re-register.

- Call was placed to a shared line
- There was no caller-ID information sent by the provider for this call
- Call was held on another phone and then resumed from the phone that unregistered.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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