Receiver, Connector pinout – Nortel Networks 1000 User Manual
Page 975
Architecture
975
The transmitter takes the binary data (dual unipolar) from the PCM
transceiver and produces bipolar pulses for transmission to the external
digital facility. The DS1 transmit equalizer allows the cabling distance to be
extended from the card to the DSX-1 or LD-1 configured in LD 17.
The transmitter takes the binary data (dual unipolar) from the PCM
transceiver and produces bipolar pulses for transmission to the external
digital facility. The Digital Signal – Level 1 (DS-1) transmit equalizer
enables the cabling distance to be extended from the card to the Digital
Signal Cross-connect – Level 1 (DSX-1), or LD-1. Equalizers are switch
selectable through dip-switches. The settings are shown in
"NTRB21 switch settings" (page 975)
Table 410
NTRB21 switch settings
Switch Setting
Distance to Digital
Cross-Connect
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
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.
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 DS1 signal source.
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.
Connector pinout
The connection to the external digital carrier is through a 15 position Male
D-type connector.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
02.06
Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.