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Cisco Unified IP Phone 7900 Series

Field Notice: FN - 63766 - 7900 Series - Intermittent Bug Might Impact Interoperability with Cisco Emergency Responder (CER) - Firmware Upgrade

Field Notice: FN - 63766 - 7900 Series - Intermittent Bug Might Impact Interoperability with Cisco Emergency Responder (CER) - Firmware Upgrade

June 27, 2014


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.

Revision History

Revision Date Comment
1.0
27-JUN-2014
Initial Public Release

Products Affected

Products Affected
CP-7906G 
CP-7911G 
CP-7931G 
CP-7941G 
CP-7941G-GE 
CP-7942G 
CP-7945G
CP-7961G 
CP-7961G-GE
CP-7962G
CP-7965G 
CP-7970G 
CP-7971G-GE
CP-7975G 

Problem Description

Some models of the 7900 Series phones that use firmware Version 9.3.1SR2.1 and earlier releases might send incomplete Device IDs to their connected Cisco switches.

Cisco advises all customers to upgrade their 7900 Series phones to firmware Version 9.3.1SR3 or later in order to obtain this fix and other important firmware upgrades. 

Impacted Device Type Impacted Load Name Impacted Version
7911_7906-sccp
7911_7906-sccp.9-3-1SR2-
9.3(1SR2.1)
7911_7906-sip
7911_7906-sip.9-3-1SR2-1
9.3(1SR2.1)
7931-sccp
7931-sccp.9-3-1SR2-1
9.3(1SR2.1)
7931-sip
7931-sip.9-3-1SR2-1
9.3(1SR2.1)
7941_7961-sccp
7941_7961-sccp.9-3-1SR2-1
9.3(1SR2.1)
7941_7961-sip
7941_7961-sip.9-3-1SR2-1
9.3(1SR2.1)
7942_7962-sccp
7942_7962-sccp.9-3-1SR2-1
9.3(1SR2.1)
7942_7962-sip
7942_7962-sip.9-3-1SR2-1
9.3(1SR2.1)
7945_7965-sccp
7945_7965-sccp.9-3-1SR2-1
9.3(1SR2.1)
7945_7965-sip
7945_7965-sip.9-3-1SR2-1
9.3(1SR2.1)
7970_7971-sccp
7970_7971-sccp.9-3-1SR2-1
9.3(1SR2.1)
7970_7971-sip
7970_7971-sip.9-3-1SR2-1
9.3(1SR2.1)
7975-sccp
7975-sccp.9-3-1SR2-1
9.3(1SR2.1)
7975-sip
7975-sip.9-3-1SR2-1
9.3(1SR2.1)


Background

A defect found in the firmware noted in the Products Affected section might cause some models of the 7900 Series phones to send incomplete Device IDs to their connected Cisco switches. As a result, Cisco Emergency Responder (CER) might be unable to locate some phones that run this firmware. Emergency (911) calls might be associated with incorrect locations and might be sent to the wrong Public Safety Answering Point (PSAP).

After further investigation, Cisco believes that the defect might exist in previous releases of the firmware for the affected phones. Therefore, Cisco encourages customers to upgrade their phones to the latest firmware. 

Problem Symptoms

Some models of the 7900 Series phones do not send the correct Device ID to the switch via Cisco Discovery Protocol (CDP). For example, if a Device ID is configured as SEP012345678901, the phone sends ?SEP0? to the Cisco switch. This affects 7900 Series phones that run Version 9.3.1SR2.1.

Workaround/Solution

The workaround is to hard reset the phone. For example, issue a 'shutdown' followed by 'no shutdown' on a Power over Ethernet (PoE) switchport. 

Upgrade affected phones to the firmware version 9.3.1SR3 or later. 

DDTS

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

DDTS Description
CSCuj11814 (registered customers only) 796x/4x phones not passing correct Device IDs to switch port via CDP

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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