Electrical Specifications - Nortel Circuit Card Installation Manual

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Electrical specifications

T1 channel specifications
553-3001-211 Standard 3.00
NT5D11 and NT5D14 Lineside T1 Interface cards
Man-Machine Interface
The lineside T1 card provides an optional Man-Machine Interface (MMI) that
is primarily used for T1 link performance monitoring and problem diagnosis.
The MMI provides alarm notification, T1 link performance reporting and
fault isolation testing. The interface is accessed through connections from the
I/O panel to a terminal or modem.
The MMI is an optional feature since all T1 configuration settings are
performed through dip switch settings or preconfigured factory default
settings.
Table 77 provides specifications for the 24 T1channels. Each characteristic is
configured by dip switches.
Table 77
Lineside T1 card – line interface unit electrical characteristics
Characteristics
Framing
Coding
Signaling
Distance to Customer Premise
Equipment (CPE) or Channel
Service Unit
August 2005
Description
ESF or D4
AMI or B8ZS
Loop or ground start A/B robbed-bit
0-199.6 meters (0–655 feet)