RFC-1 Advanced Operation page 6.44
6.8.8 Ring Sensitivity and Hang-up Detection
Previous versions of the RFC-1 used a different, non-linear scale for the ring sensitivity
adjustment. The scale below is only appropriate for systems running version 6.0 or higher.
Using this data table to adjust earlier versions can cause unexpected and undesirable behavior.
In previous versions of the RFC-1 the ring sensitivity setting shared a memory location with the dedicated control port
feature. The dedicated control port adjustment has been combined with the communication mode at address 1002.
In version 6, ring sensitivity is combined with the pulse hang-up detection disable setting.
Modern communication systems offer a variety of devices that provide the services of a traditional phone system.
Many of these devices generate a ring signal that not the same as the ring signal generated by a standard telephone
line. In some cases, it is necessary to adjust the RFC-1 so that it recognizes the ring signal.
The adjustment only affects ring detection. It has no effect on outbound dialing or on DTMF tone detection.
Select the ring sensitivity setting from the table below and program the corresponding V1 at address 1014. Higher
values have more aggressive ring detection. Do not select a value of V1 higher than 7 unless you have a very specific need.
* This is the default setting.
Devices that emulate a telephone line often require this adjustment. Devices include cellular phone docking stations
and broadband voice line interfaces. Any device that regenerates the incoming ring signal may require increasing the
ring sensitivity. The setting V1=7 usually works with these devices.
This adjustment also provides a method to disable the hang-up detector in the RFC-1. The hang-up pulse detector is
responsible for determining when the RFC-1 has lost the telephone line unexpectedly. With the detector disabled,
the RFC-1 will not respond to a lost telephone line. It will remain in operating mode until the hang-up command, 99,
is issued or until the idle system timer expires—2.5 minutes in the factory setting. See below.
The pulse hang-up detector should only be disabled in situations where the RFC-1 is receiving false pulses and
dropping the connection at inappropriate times on a recurring basis.
To Next Page
Loading...
Need help?
General
