Installation and Operation Guide

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6.4.1. Callback Mode
 After reporting an alarm successfully to the CMS, CH-MG will enter
callback mode by default.
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 CH-MG will enter callback mode only after all groups have been reported
to and at least one report was successful.
 If the number of the incoming call matches any of the Caller ID, CH-MG
will instantly pick up the call, emit one beep (at the caller handset) and
open a two-way communication.
 The caller can call back multiple times during the callback period.
 The caller can use the following DTMF commands to control the call:
- Enter (1) for talk-only mode.
- Enter (2) for two-way voice communication.
- Enter (3) for listen-in only mode.
- Enter (9) to hang up.
- Put the handset back to the base cradle to end the call.
- Press and hold the Help Button of CH-MG for 5 seconds, or press
Active Button of RF device (WTR, Fall Sensor or PB) once to end the
call.
- Press any DTMF key except for the designated hang-up key (9) to
reset the communication time to 5 minutes. When a DTMF key is
pressed, its designed shortcut function will also be executed along with
the communication time reset.
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 If you wish to enable a designed shortcut function, please press the DTMF
key for at least 1 second.
6.4.2. Speech Reporting Method
 If speech reporting method is selected, CH-MG will dial the programmed
number for reporting. It will establish a two-way voice communication
between the call recipient and CH-MG user.
 The CMS can remotely control CH-MG during the voice communication
period using the DTMF commands below:
- Enter (1) for talk-only mode.
- Enter (2) for two-way voice communication.
- Enter (3) for listen-in only mode.
- Enter (9) to hang up.
- Put the handset back to the base cradle to end the call.
- Press and hold the Help Button of CH-MG for 5 seconds, or press the
Active Button of RF device (WTR, Fall Sensor or PB) once to end the