Guest

Cisco Unified IP Phone 7900 Series

Field Notice: FN - 62121 - CP-7940G and CP-7960G May Reboot if Volume is Set to Maximum


October 31, 2005


NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Products Affected

Products Affected

CP-7940G IP Phone

CP-7960G IP Phone

Problem Description

The IP Phone may reboot if volume is set to maximum, a call is placed to it, and the caller makes a loud noise.

This occurs with the Session Initiated Protocol (SIP) or Signaling Connection Control Part (SCCP) IP Phone software loads.

Background

The circumstances under which this anomaly may be manifested are as follows:

  1. IP Phone A has volume set to maximum.

  2. Phone B calls IP Phone A.

  3. IP Phone A picks up call either through Headset Button or by picking up Handset.

  4. Caller at Phone B speaks loudly or or blows into the Phone B microphone.

  5. IP Phone A reboots.

Problem Symptoms

The IP Phone reboots, dropping the call. The IP Phone returns to on-line status after re-registering with the call manager application.

Workaround/Solution

Workaround:

Reduce the volume on the IP Phone.

Solution:

Phone firmware loads were released to resolve this behavior.

  • For IP Phones with SIP, download version 7.5 or later releases

  • For IP Phones with SCCP, download version 7.2(1) or later releases

These phone firmware downloads may be obtained from the cisco.com Voice Software (registered customers only) download site.

Look for the protocol appropriate to your IP Phone.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCsa68504 (registered customers only)

(SIP) Audio is heard in the speaker while using handset

CSCef53862 (registered customers only)

(SCCP)Faint audio is heard in the speaker while using handset

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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