Emerson ROC827 RJ-11 Field Connections, Modem Signal Routing Comm3, Comm4, and Comm5, Signal Pin

ROC827 Instruction Manual

Note: When installing a dial-up modem module, you must remove power from the ROC827.

The dial-up modem provides communications with speeds up to 14.4K bps with V.42 bis and V.42, MNP2-4 and MNP10 error correction, and is FCC Part 68 approved for use with PSTNs. The FCC label on the module provides the FCC registration number and the ringer equivalent. The module supports data compression, error correction, and nonvolatile RAM for permanent storage of the modem configuration.

Using asynchronous operation, the module interfaces to two-wire, full- duplex telephone lines. It interfaces to a PSTN through an RJ-11 jack.

You control the modem using industry-standard AT command software. A 40-character command line is provided for the AT command set, which is compatible with EIA document TR302.2/88-08006.

The dial-up modem automatically hangs up after a user-configured period of communications inactivity and provides automated dial-up alarm reporting capabilities. Refer to the ROCLINK 800 Configuration Software User Manual (Form A6121).

Table 5-13. RJ-11 Field Connections

Signal Pin

Tip 3

Ring 4

LED indicators on the module show the status of the Receive (RX),

Transmit (TX), Ring (RI), and Carrier Detect (CD) control lines.

Table 5-14 displays connector signals and their functions.

Table 5-14. Modem Signal Routing – Comm3, Comm4, and Comm5

Signal	Function	Terminal
RX	Lit when module (Comm3, Comm4, or Comm5) is currently receiving.	1
TX	Lit when module (Comm3, Comm4, or Comm5) is currently transmitting (Tip).	3
RI	Lit when module (Comm3, Comm4, or Comm5) on ring (Ring).	7
CD	Lit when module (Comm3, Comm4, or Comm5) on carrier detect.	9

Notes:

ƒIf you are installing a modem module, it is recommended that you install a surge protector between the RJ-11 jack and the outside line.

ƒThe dial-up modem is not hot-swappable or hot-pluggable. When installing a dial-up modem module, you must remove power from the ROC827.

Issued Mar-06 Communications 5-13