Nortel Networks Circuit Card 사용자 설명서
Page 202 of 906
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.
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.
performed through dip switch settings or preconfigured factory default
settings.
Electrical specifications
T1 channel specifications
Table 77 provides specifications for the 24 T1channels. Each characteristic is
configured by dip switches.
configured by dip switches.
Table 77
Lineside T1 card – line interface unit electrical characteristics
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
Equipment (CPE) or Channel
Service Unit
Equipment (CPE) or Channel
Service Unit
0-199.6 meters (0–655 feet)