Cisco ATA 186 Administrator's Manual page 162

Frequently Asked Questions
Table 9-1
Ring Load (per RJ-11 FXS Port)
2 REN
1 REN
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 Cisco ATA detect the DTMF signal?
3. Can you dial the remote side?
Can the Cisco ATA ring the phone?
4.
Is voice quality satisfactory?
5.
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.
Does the Cisco ATA support an overhead paging system, and, if so, does the Cisco ATA support
Q.
power denial?
The Cisco ATA supports an overhead paging system only if that system does not require power
A.
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
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide (H.323)
9-6
Ring Loads and Distances (continued)
5-27.
Maximum Distance
2500 feet (762 m)
3200 feet (975 m)
Chapter 9 Troubleshooting
OL-4008-01