Installation guide

A-12

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

OL-1165-06

Appendix A System Specifications

E1 Interface for UFI-8E1 Back Card

This section applies to each E1 line on the UFI-8E1. The UFI-8E1 is the eight-port E1 interface card for

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

Input jitter tolerance: Meets AT&T PUB 62411 specifications

Output jitter generation: Meets AT&T PUB 62411 using normal mode synchronization

Connector: DB-15 female

Line interface connector: DB-15 (120 ohms), BNC (75 ohms)

Line rate: 2.048 Mbps, ± 50 bps (± 200 bps VCO lock range)

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

Number of Frame Relay

interfaces:

1–31 occupied channels where 1 ≤ N ≤ 31, and the sum of all

N <= 31.

Frame Relay interface

rate:

Either 56 kbps or N x 64 kbps, where 1 ≤ N ≤ 31. Sum of all

N ≤ 31.

Line code: Bipolar HDB3

Line impedance: 120 ohms (balanced) or 75 ohms (balanced or unbalanced)

Minimum pulse density: Zero-code suppression using HDB3 coding

Frame format: Unframed: 32-channel (G.703). Framed: 30 or 31-channel

multiframe per ITU-T G.704.

VF Signaling: CAS or CCS

Maximum line length: E1 output complies with G.703, so cabling must not exceed

-6 dB/1000 ft at 1024 KHz (whether cable is coaxial or twisted

pair)

Input jitter tolerance: Meets G.823

Output jitter generation: Meets G.823

Electrical interface: Complies with G.703 specification

Connector: Back card has either all DB-15 female or all BNC connectors