Signaling Interface - Avaya Nortel Communication Server 1000 Reference

NTBK50 2.0 Mb PRI card
Offset
12
13
14
15

Signaling interface

The signaling interface consists of the A07 DS-30X signaling controller. This interface provides
an 8 Kbps signaling link via the DS-30X timeslot zero data bit zero. Messages are 3 bytes in
length.
Carrier interface
For the E1 interface, the connection to the external digital carrier is provided by the line
interface chip. This device provides accurate pulse shaping to meet the CCITT pulse mask
requirements. It provides clock recovery functions on the receive side, as well as tolerance to
jitter and wander in the received bit stream.
Impedance matching (Switch SW2)
The line interface provides for the use of 120 ohms twisted pair cable. The impedance is
selected by SW2, as shown in
page 556.
Table 239: Impedance matching switch settings
Note:
The ON position for all the switches is toward the bottom of the card. This is indicated by a
white dot printed on the board next to the bottom left corner of each individual switch.
Carrier grounding
NTBK50 enables the shield of the Tx and/or Rx pairs of the carrier to be selectively grounded.
Closing (down position) the on-board switch applies FGND to the appropriate carrier cable
556 Circuit Card Reference
PAD SET 0
PAD
12.0 dB
13.0 dB
14.0 dB
spare
Table 239: Impedance matching switch settings
Cable Type
120 ohms
Comments? infodev@avaya.com
PAD SET 1
Offset
12 spare
13 spare
14 Idle Code
15 Unassigned Code
SW 2-1
Up (Off)
PAD
on
July 2011