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February 2003 B-3
1000-A2-GN22-00 B. Pin Assignments and Indicators
Ethernet LAN
(10Base-T or 100Base-T)
Physical interface: CAT-5 or equivalent cable
Termination: RJ-45 plug
T-1 PSTN
(Host Class 5 switch)
Physical interface: DS1 short-haul 4-wire, twisted pair
(ABAM)
Impedance: 100
(nominal)
Max. span length: 655 ft.
Line Build Out: 0–133 ft., 133–266 ft., 399–533 ft.,
533–655 ft.
(factory set per customer order)
Termination: RJ-48C plug
Signal amplitude: 2.4 to 3.6V (DSX-1)
Rcv Attenuation: <10dB (DSX-1)
Framing: ESF (10 ms maximum)
Line coding: B8ZS
Clock: T-1/DS-1 Rcv span
(defaults to internal if Rcv fails)
STS-1 PSTN
(Host Class 5 switch)
Physical interface: DS-3 short-haul coaxial cable
STS-1 module is a 51.84 Mbps full
duplex link between the cPCI bus
in the CPX-1000 and the external
PSTN network.
Impedance: 75
(nominal)
Max. span length: 450 ft. of 734A or equivalent
coaxial cable
Termination: Dual socket BNC coaxial
connectors
Signal amplitude: ±1.75 volts ±10%
Xmt power: -2.7 to +4.7 dBm
Transmission rate: 51.84 Mbps full duplex
Line coding: B3ZS
Table B–1. Connection Requirements and Physical Layer
Specifications (Continued)
Connections Cables, Connectors, and Specifications