9-6
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)
OL-3410-01
Chapter9 Troubleshooting
Contacting TAC
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 Increase the wire gauge to reduce the impedance until the Cisco ATA can detect on/off hook and DTMF
signal.
Step 2 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 CiscoATA 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 CiscoATA 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 pagexvi for instructions on contacting TAC.
Note Customers who obtained their equipment through service providers, independent dealers and othe r third
parties must contact their equipment provider for technical assistance.