Ds-1 Carrier Interface - Nortel Enterprise 1000 Reference Manual

Page 142 of 236

DS-1 Carrier interface

Table 32
NTAK09 switch settings
Distance to Digital Cross-Connect
0 - 133 feet
133 - 266 feet
266 - 399 feet
399 - 533 feet
533 - 655 feet
553-3023-211 Standard 1.00 June 2001
NTAK09 1.5 Mb DTI/PRI card
DCHI can be enabled and disabled independent of the PRI card, as long as the
PRI card is inserted in its cabinet slot. The D-channel data link cannot be
established however, unless the PRI loop is enabled.
On the NTAK09 use switch 1, position 1 to select either the D-channel feature
or the DPNSS feature, as follows:
OFF = D-channel
ON = DPNSS (U.K.)
Note: DPNSS is not supported at this time
Transmitter
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. Equalizers are switch
selectable through dip-switches. The settings are shown in Figure 32.
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
Switch Setting
1 2
DCH F/W (LEN 0)
Off Off
Off On
Off Off
Off On
Off Off
3 4
(LEN 1) (LEN 2)
Off On
On Off
On Off
Off Off
Off Off