The 3-MODCOM is a modem communicator module that provides dialer and modem functions for the EST3 system, connecting it to the switched telephone network (Page 188) [1].
It transmits alarm, supervisory, and trouble messages to a central monitoring station (CMS) and can receive database information from remote computers using ACDB or KDC programs (Page 186) [1].
The module supports up to 255 accounts and 80 receivers (Page 188) [1].
Supported reporting protocols include:** Contact ID** (numeric messages with event codes), SIA DCS (ASCII text messages), SIA P2 (3/1 pulse format), SIA P3 (4/2 pulse format), and TAP (Telocator Alphanumeric Protocol, supported by the 3-MODCOMP version only) (Page 192) [1].
