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Cisco Bug: CSCuq39785 - 7841 9971 SIP Phones will not register to SRST when DN has prefix of # &

Last Modified

Apr 24, 2020

Products (72)

  • Cisco IOS
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco 2951 Integrated Services Router
  • Cisco C892FSP Integrated Services Router
  • Cisco 888W Integrated Services Router
  • Cisco VG204XM Analog Voice Gateway
  • Cisco 861W Integrated Services Router
  • Cisco 819 Hardened Integrated Services Router
  • Cisco 892W Integrated Services Router
  • Cisco 812 CiFi Integrated Services Router
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Known Affected Releases


Description (partial)

Cisco 7841 and 9971 SIP Phones will not register to a Cisco CME / SRST router when their directory number (DN) contains a prefix of #.

It is also observed that the phones will not register when its directory number (DN) labels, names, and  phone speed dials use "&" ampersands in the string.

For example if the DN is ###7772 the SIP phone will not register to the SRST router or will not show this DN on the SIP phone at all. This same SIP phone can register to the Cisco Unified Communications Manager (CUCM) server without any issues.
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