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) |
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