Question
What can cause a panel sending Contact ID to produce Data Errors in the receiver?
Answer
Verify the length of the data error. A panel sending contact ID will send 16 digits for the Contact ID signal.
Common causes of the panel not sending the correct number of digits include the following:
- Voice over IP with Low Sample Rate or Line Compression
- Line card or Line Terminator Card on the receiver (D6600 only)
- Panel problem (Corruption, Bad Dialer, etc)
- Noise on the phone line
There is a checksum value in the Contact ID signal. An incorrect checksum will cause a data error. An invalid checksum value may be caused for the same potential reasons as a dropped DTMF digit (see list above).
Possible fixes for the problem include the following:
- Reprogram the field panel
- Swap panel
- Use a dedicated, analog phone line
- Swap the Line Card and Line Terminator Card in the receiver
- Have a qualified telephone technician check the phone line on the site with the panel or at the receiver for problems.
