DIGITAL LINE RATE |
56 or 64 Kbps
Bi-Polar Non-Return-to-Zero Modulation
135 ohm +/- 10% Transmit Impedance
Transmit Level @ 135 ohm Load, 56 Kbps, 1.4v peak
135 ohm +/- 10% Receive Impedance
Receive Level Sensitivity, -49 dB
Automatic Equalization |
DATA RATES |
Synchronous Rate of 56 or 64 Kbps |
OPERATING MODES |
Dedicated Digital Service
Short Haul Modem
Point-to-Point
Point-to-Multipoint |
TRANSMISSION LINE |
4-Wire Leased Line, Telephone Company Digital Line (DDS)
4-Wire in-house 2-Twisted Pair, for Line Driver |
DEFAULT CONFIGURATION |
All Five Dipswitches Down, (Located Behind an Access Panel on the Right Side of the Unit)
56 Kbps
Slave Clock (Phone Company Timing)
Internal Transmit Clock RTS Normal |
FRONT PANEL LEDs |
Power, Transmit Data, Receive Data, Request to Send, Clear to Send, Carrier Detect, Test |
LOOPBACKS |
Local Bidirectional (Toward Terminal & Toward Phone Line)
Telco Initiated CSU or DSU Loopback
Test Light (On when Loopbacks are in Use) |
RESET SWITCH |
Push Button Switch (Located Behind an Access Panel on the Right Side of the Unit) |
CONNECTORS |
Telco – RJ-48S, RS232D – DB-25 Female, V.35 – M34 Female |
PHYSICAL |
10-1/4” W x 9-3/4” D x 2-1/2” H, 1Lb. |
ELECTRICAL |
-48 Volts DC |
TELCO JACK (RJ-48S) |
PIN |
SIGNAL |
1 |
Transmit Data |
2 |
Transmit Data |
7 |
Receive Data |
8 |
Receive Data |
RS232D/V24 INTERFACE (DB-25S) |
PIN |
SIGNAL NAME - IN/OUT |
1 |
Frame Ground |
2 |
Transmit Data - IN |
3 |
Receive Data - OUT |
4 |
Request to Send - IN |
5 |
Clear to Send - OUT |
6 |
Data Set Ready - OUT |
7 |
Signal Ground |
8 |
Data Carrier Detect - OUT |
15 |
Transmit Bit Clock - OUT |
17 |
Receive Bit Clock - OUT |
24 |
External Transmit Clock - IN |
V.35 INTERFACE (M34 FEMALE) |
PIN |
SIGNAL NAME - SIGNAL SOURCE |
A |
Frame Ground |
B |
Signal Ground |
C |
Request to Send - Terminal (Unbalanced) |
D |
Clear to Send - DSU (Unbalanced) |
E |
Data Set Ready - DSU (Unbalanced) |
F |
Data Carrier Detect - DSU (Unbalanced) |
P |
Transmit Data A - Terminal (Balance) |
S |
Transmit Data B - Terminal (Balance) |
R |
Receive Data A - DSU (Balanced) |
T |
Receive Data B - DSU (Balanced) |
Y |
Transmit Clock A - DSU (Balanced) |
AA |
Transmit Clock B - DSU (Balanced) |
U |
Terminal Timing A - DSU (Balanced) |
W |
Terminal Timing B - DSU (Balanced) |
V |
Receive Clock A - DSU (Balanced) |
X |
Receive Clock B - DSU (Balanced) |