Transition Networks SSDTF1015-100 CABLE SPECIFICATIONS continued, Twisted-Pair Copper Cable

CABLE SPECIFICATIONS (continued)

Twisted-Pair Copper Cable

Twisted pair connection requires two active pairs. The two active pairs in a T1/E1 network are pins 1 & 2 and pins 4 & 5. Use only dedicated wire pairs (such as blue/white & white/blue, orange/white & white/orange) for the active pins.

Category 3 or better twisted-pair copper wire is required. Either shielded twisted-pair (STP) or unshielded twisted-pair (UTP) can be used.

T1:

Gauge	24 to 22 AWG
Attenuation	2.6 dB/100 meters @ 1.0 MHz
Differential Characteristic Impedance	100 Ω ±10%

E1:

Gauge	24 to 22 AWG
Attenuation	2.6 dB/100 meters @ 1.0 MHz
Differential Characteristic Impedance	120 Ω ±10%

Dry-Contact Relay

RJ-45 dry-contact relay opens if power, signal detect/copper or signal detect/fiber are lost.

Operational rating on pins 3 and 6: 0-30VDC maximum 1A

Relay

3RJ-45

6

Switch-Selectable Configurations

T1 COPPER RJ-45

Configured as either "long haul" or “short haul” on 100 ohm cable, with a variety of selectable distance settings.

E1 COPPER RJ-45

Configured as either "long haul" or “short haul” on 120 ohm cable.

STRAIGHT-THROUGH/CROSSOVER RJ-45

Allows straight-through cable to be used where crossover-configuration cable is required.

Switch-Selectable Functions

LOOPBACK TEST FUNCTION

A loopback switch facilitates installation and network debug procedures. The path for the SSDTF10xx loopback is shown:

TP Fiber TP

TRANSMIT ALL ONES FUNCTION

A selectable Transmit All Ones switch on the fiber interface and on the twisted-pair interface allows for insertion of an “all ones” pattern on that interface when signal detect is lost, which creates an alarm condition at the equipment connected to the interface.