Nortel Networks Circuit Card - Manual (Page 836)

Page 836 of 906 NTRB21 DTI/PRI/DCH TMDI card
553-3001-211 Standard 3.00 August 2005
Cross-connect – Level 1 (DSX-1), or LD-1. Equalizers are switch selectable
through dip-switches. The settings are shown in Table 264.
Receiver
The receiver extracts data and clock from an incoming data stream and
outputs clock and synchronized data. At worst case DSX-1 signal levels, the
line receiver operates correctly with up to 655 feet of ABAM cable between
the card and the external DS-1 signal source.
Table 264
NTRB21 switch settings
Distance to Digital
Cross-Connect
Switch Setting
1
DCH F/W
2
(LEN 0)
3
(LEN 1)
4
(LEN 2)
0 - 133 feet Off Off Off On
133 - 266 feet Off On On Off
266 - 399 feet Off Off On Off
399 - 533 feet Off On Off Off
533 - 655 feet Off Off Off Off