Nortel Networks 553-3001-211 manual T1 channel specifications, Man-Machine Interface

Page 190 of 894 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.

Electrical specifications

T1 channel specifications

Table 72 provides specifications for the 24 T1channels. Each characteristic is set by dip switches.

Table 72

Lineside T1 card – line interface unit electrical characteristics

Characteristics	Description
Framing	ESF or D4
Coding	AMI or B8ZS
Signaling	Loop or ground start A/B robbed-bit
Distance to Customer Premise	0-199.6 meters (0–655 feet)
Equipment (CPE) or Channel
Service Unit

553-3001-211 Standard 2.00 September 2004