Lucent Technologies DDM-2000 OC-3 User Manual

363-206-285
Technical Specifications
10-2 Issue 3 June 2001
Electrical Interfaces 10
The DDM-2000 OC-3 Multiplexer supports DS1 electrical, DS3 electrical, and
EC-1 electrical high-speed and low-speed interfaces.
DS1 Low-Speed (BBF1B) 10
■ Electrical Specification
The DS1 low-speed interface transmits and receives a standard electrical
DS1 signal as specified in
ANSI
*
T1.102-1993, Section 2 (1.544 Mb/s
nominal rate, DSX-1 interconnect specification). Line coding is
provisionable to alternate mark inversion (AMI) with or without bipolar
8-zero substitution (B8ZS). Line buildout is provisionable as follows:
— 613C (22 gauge): 30 to 655 ft.
— 1249-C (26 gauge): 30 to 450 ft.
■ Format Specification
The DS1 low-speed interface provides clear channel transport of any
DSX-1 compatible signal. There are no format constraints on this interface.
■ Alarm Thresholding
The following parameters are monitored at the DS1 interface:
— Loss of signal (LOS)
— Line coding violations (CV-L)
■ Loopback
— Quad DS1 facility loopback.
The alarm level for each of the monitored parameters can be provisioned to
critical (CR), major (MJ), minor (MN), or status. B8ZS and AMI coding violation
failure thresholds are user settable to 10
-3
or 10
-6
and in addition for Release 8.0
and later releases 10
-7
or 10
-8
BER.
DS1PM Low-Speed (BBF3/BBF3B) 10
■ Electrical Specification
The DS1PM low-speed interface transmits and receives a standard
electrical DS1 signal as specified in
ANSI T1.102-1993, Section 2
(1.544 Mb/s nominal rate, DSX-1 interconnect specification). Line coding is
provisionable to AMI with or without B8ZS. Line buildout is provisionable as
follows:
*

Lucent Technologies DDM-2000 OC-3 Specifications

General

Brand	Lucent Technologies
Model	DDM-2000 OC-3
Category	Multiplexer
Language	English