Cisco ATA-186 Administration Guide - Page 164

Contacting TAC Chapter 9 Troubleshooting 5. Is voice quality satisfactory? If you answer no to any of the above questions, you may have a loop impedance greater than 400 ohm. In this case, perform the following procedure. Procedure Step 1 Step 2 Increase the wire gauge to reduce the impedance until the Cisco ATA can detect on/off hook and DTMF signal. If the Cisco ATA cannot ring the phone, find a phone that can ring at a lower ringing voltage. Also, try to use only one phone instead of multiple phones in parallel. Q. Does the Cisco ATA support an overhead paging system, and, if so, does the Cisco ATA support power denial? A. The Cisco ATA supports an overhead paging system only if that system does not require power denial (battery removal) when a call is disconnected. However, the Cisco ATA can be configured to reverse the voltage polarity when a call is connected or disconnected. For more information, see the "Polarity" section on page 5-27. Contacting TAC Qualified customers who need to contact the Cisco Technical Assistance Center (TAC) must provide the following information: • Product codes. • Software version number-To identify the software revision number, use the configuration menu number 123. • Hardware version number-To identify the hardware revision number, use the serial number and MAC address found on the label on the bottom of the Cisco ATA. The MAC address can also be obtained using voice menu option 24. • Software build information-To identify the software build information, use the voice menu option 123123. • Cisco ATA serial number. See the "Obtaining Technical Assistance" section on page xvi for instructions on contacting TAC. Note Customers who obtained their equipment through service providers, independent dealers and other third parties must contact their equipment provider for technical assistance. Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide (SIP) 9-6 OL-3410-01