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Cisco Bug: CSCup37581 - OFFHOOK_ALERT tone not working with cptone GB on an STCAPP FXS port

Last Modified

Apr 19, 2019

Products (104)

  • Cisco IOS
  • Cisco 2951 Integrated Services Router
  • Cisco 1905 Serial Integrated Services Router
  • Cisco 888W Integrated Services Router
  • Cisco 886VA-CUBE Integrated Services Router
  • Cisco AS5400XM Universal Gateway
  • Cisco 892W Integrated Services Router
  • Cisco VG204 Analog Voice Gateway
  • Cisco 878 Integrated Services Router
  • Cisco 861W Integrated Services Router
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Known Affected Releases


Description (partial)

OFFHOOK_ALERT tone will not play on an FXS port registered via SCCP (STCAPP) to a Cisco Communications Manager Express (CME) system.

The offhook alert tone is not played when the cptone setting on the FXS voiceport is set to GB. If set to US it works fine after offhook condition of 2 minutes. The voice port is registered via SCCP to a CME system on a separate Cisco 3925 router. The issue started after the Cisco IOS was upgraded to version 151-4M7, it works fine in 150-1M4.
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