Instruction manual

MERLIN LEGEND Communications System Release 5.0

Installation

555-650-140

Issue 1

June 1997

Installing the Control Unit

Page 2-36

Installing the Modules

■ E&M Mode

— Type 1 Standard (default factory setting). This setting is used to

connect two systems through local telephone company facilities.

— Type 1 Compatible. This setting connects two systems directly

(without using local telephone company facilities).

■ Simplex Mode

■ Type 5. This setting is used on 4-wire (2-pair) circuits.

400EM (Tie Trunk) Module DIP Switches

During installation of 400EM (Tie Trunk) modules, refer to Table 2-4 and

Table 2-5

, and to Figure 2-11 for the correct DIP switch settings for varying

signaling protocols.

Table 2-4. Setting the 400EM (Tie Trunk) Module DIP Switches

Ports DIP Signaling Type

(as numbered in

Figure 2-11

)

Switch

Position

1S (Default)

and 1C

Unprotected

E&M Mode

1C and 1S

Protected

E&M Mode

Simplex

Mode

1 ON OFF OFF or ON

2 ON OFF OFF or ON

3OFF OFF ON

4OFF OFF ON

5OFF OFF ON

6 ON OFF OFF or ON

7 ON OFF OFF or ON

8OFF OFF ON

9OFF OFF ON

10 OFF OFF ON