Chapter 5: Installation
132 EST3X Technical Reference Manual
the module sends a trouble message to the SFS1-CPU. The module retries
the full number of attempts if another event is activated or makes one attempt
if a configured period (Wait Time Between Attempts) expires.
5. When the call is completed, ringing is detected by the CMS dialer-receiver
(DACR). The DACR goes off-hook and transmits a handshake.
6. If the handshake matches the desired transmit format, the 3-MODCOM
transmits, in the specified format, all premises event data.
The Line 1 or Line 2 LED flashes to indicate data is being transmitted.
7. The 3-MODCOM waits for an acknowledgement and a shutdown signal from
the CMS receiver, then puts the line on-hook, ending the call.
The Line 1 or Line 2 LED stops indicating.
Installing the 3-MODCOM
When installing the 3-MODCOM, follow these general steps:
1. Identify suitable telephone company lines and services.
2. Install the 3-MODCOM module on the electronics chassis.
3. Connect the 3-MODCOM to telephone company lines.
4. Download configuration data from the 3-SDU.
5. Make test transmissions to verify proper operation.
Telephone line requirements
The 3-MODCOM is supplied with two 7-foot cables that are 8-conductor, flat
telephone cables, with 8-position modular plugs on both ends. One end of the
cable plugs into the 3-MODCOM. The other end plugs into an RJ-31X jack. You
must obtain the RJ-31X jack locally.
WARNING: Failure to use an RJ-31X jack violates FCC and NFPA regulations. A
telephone connected directly to the incoming telephone line without the proper
use of the RJ-31X jack will cause a telephone company trouble when used and
possibly prevent the dialer from getting through to the CMS receiver in an
emergency.
• The RJ-31X jack must be used to connect each line of the 3-MODCOM to the
switched telephone network. One jack is required for each telephone line.
The 8-position jack has a special jumper between terminals 1 and 4, and 5
and 8. This jumper is in place when the plug is removed from the jack.
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