Environmental Specifications; Connector Pin Assignments - Nortel NT1R20 Description

Page 208 of 290

Environmental specifications

Connector pin assignments

553-3001-105 Standard 5.00 June 1999
NT8D02 Digital Line Card
Table 53 shows the environmental specifications of the card.
Table 53
Digital line card—environmental specifications
Parameter
Operating temperature
Operating humidity
Storage temperature
Table 54 shows the I/O pin designations at the backplane connector, which is
arranged as an 80-row by 2-column array of pins. Normally, these pin
positions are cabled to 50-pin connectors at the I/O panel in the rear of each
module for connection with 25-pair cables to the MDF.
The information in Table 54 is provided as a reference and diagnostic aid at
the backplane, since the cabling arrangement may vary at the I/O panel. See
Meridian 1 system installation procedures (553-3001-210) for cable pinout
information for the I/O panel. Figure 58 shows a typical cross connection
example.
Specifications
0° to +60° C (+32 to +140° F), ambient
5 to 95% RH (non-condensing)
–40° to +70° C (–40° to +158° F)