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ME375A

ANA

REM

PATT

INTERFACE CONN.

PWR

RTS

TD

RD

DCD

TEST

BLACK BOX

RESET

PATT

REM

ANA

DIG

TEST

DCD

LOS

ERR

RD

TD

RTS

PWR

ASYNC/SYNC 2-WIRE SHORT HAUL MODEM

DIG

ERR LOS

1 2 3 4 5 6 7 8

9

DATA RATE
SELECTION

0 = 600 bps
1 = 1.2 Kbps
2 = 2.4 Kbps
3 = 4.8 Kbps
4 = 9.6 Kbps
5 = 19.2 Kbps
6 = 38.4 Kbps
7 = 48 Kbps
8 = 56 Kbps
9 = 64 Kbps
A = 128 Kbps

POS BAUD

EXT

INT

LBT

CLK SOURCE

DIS

EN

DIS

EN

CHASSIS GND

DIS

CON

Interfaces:  ME375 models:  2-wire telco, EIA RS-232;
                     ME376 models:  2-wire telco, ITU-TSS (CCITT) V.35

Protocols:  DTE side:  Synchronous or Asynchronous
                     Line side:  2B1Q encoding

Clock Source:  Internal, External (from DTE), or received (from other unit), user-selectable.

Data Format:  7 or 8 data bits; 1 or 2 stop bits; even, odd, or no parity (user-selectable).

Operation:  Line side:  Full duplex with echo cancellation.

Data Rate:  128, 64, 56, 48, 38.4, 19.2, 9.6, 4.8, 2.4, 1.2, or .6 Kbps.

Transmission Level:  Up to 14 dBm.

User Controls:  (5) Front-mounted:

(4) Pushbuttons:  DIG (local digital loopback), ANA (local analog loopback),

        REM(remote digital loopback), and PATT (test pattern);

(1) Recessed RESET switch;

    (6) Internal Jumpers:

(1) 7-position DIP switch for protocol, data format, and signaling options;
(1) Rotary switch for data rate;
(4) Jumpers for clock source, loopback testing, and ground connection.

Diagnostics:  V.54--compliant loopback tests:

Local analog loopback (switch- or signal-triggerable);
Local digital loopback (switch-triggerable);
Remote digital loopback (switch- or signal-triggerable).

Connectors:  ME375 models: (1) RJ-45 female, (1) 3-clip terminal block, and (1) DB25 female;

ME376 models:  (1) RJ-45 female, (1) 3-clip terminal block, and (1) 34-pin M-block female.

Power:  From internal power supply through included or alternate 5-ft. (1.5m) power cord:

Input:  103.5 to 131.5 VAC, 47 to 63 Hz
Output:  5VA

LINE

4 5

2

GND

1.  Insert screwdriver into square hole.

2.  Raise inserted screwdriver, putting
     pressure on the ramp within the square
     hole.  The wire clamp within the round
     hole will open.

3.  Insert the stripped end of the wire and
     remove the screwdriver.

INSERTING WIRE INTO THE CLIPS

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