Installation guide

A-11

Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases

OL-1165-06

Appendix A System Specifications

UFM Physical and Electrical Specifications

This section contains physical and electrical specifications for the UFM cards.

T1 Interface on UFI-8T1 Back Card

This section applies to each T1 line on the UFI-8T1. The UFI-8T1 is the eight-port T1 back card for the

UFM. The information applies whether the front card supports four or eight ports.

Dimensions: Front card: 15.25 by 16.25 in. Back card: 6.5 by 16.25 in.

Weight: Front card: 8 lb (3.6 kg). Back card: 4 lb (1.8 kg).

Input voltage: –48 VDC

Power consumption: UFM-C: 66 W. UFM-U: 72 W (V.35/X.21) or 93 W (HSSI).

Interface mode: DTE or DCE

Line rate: 1.544 Mbps, ± 50 bps (± 200 bps VCO lock range)

Line framing: ESF per AT&T TR 54016

Frame Relay interface: Meets ANSI T1.618, two-octet header

Frame Relay rates: Either 56 kbps or n x 64 kbps, where 1 ≤n ≤ 24. Sum of all

n ≤24.

Number of interfaces: 1–24 occupied channels where 1 ≤n ≤ 24, and the sum of n ≤24.

Synchronization: Transmitter can be either loop-timed to line or synchronized to

node.

Line coding: B8ZS

Framing formats: Fractional T1, contiguous DS0s. Minimum of four DS0s required

Signal level: DSX-1 compatible

Line impedance: Terminated=100 ohms nominal. Bridged=1 Kohm

Pulse amplitude: Individual pulse amplitude 2.4–3.6V (making a total base-to-peak

amplitude of 6V ± 0.6V)

Minimum pulse density: Zero-code suppression, either LSB, MSB or B8ZS

VF signaling: Robbed bit D4 with A and B bits

Max. line lengths: Up to 533 ft with equalizers using ABAM cable