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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (H.323)
OL-4008-01
Chapter9 Troubleshooting
Frequently Asked Questions
The Cisco ATA, however, is not designed for long distance. The simple test is to determine if the phone
or phones that are connected to the Cisco ATA work properly in their environment.
Pay attention to the following questions:
1. Can the Cisco ATA detect on/off hook from the analog phone?
2. Can the CiscoATA detect the DTMF signal?
3. Can you dial the remote side?
4. Can the Cisco ATA ring the phone?
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.
2 REN 2500 feet (762 m)
1 REN 3200 feet (975 m)
Table9-1 Ring Loads and Distances (continued)
Ring Load (per RJ-11 FXS Port) Maximum Distance