Nortel Networks Circuit Card Manuale Utente
Page 754 of 906
NTAK79 2.0 Mb PRI card
Signaling interface
The signaling interface consists of the A07 DS-30X signaling controller. This
interface provides an 8 Kbps signaling link through the DS-30X timeslot zero
data bit zero. Messages are 3 bytes in length.
interface provides an 8 Kbps signaling link through the DS-30X timeslot zero
data bit zero. Messages are 3 bytes in length.
Carrier interface
The E1 interface connection to the external digital carrier is provided by the
line interface chip. This chip 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.
line interface chip. This chip 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.
10
10.0 dB
10
–10.0 dB
11
11.0 dB
11
spare
12
12.0 dB
12
spare
13
13.0 dB
13
spare
14
14.0 dB
14
Idle Code
15
spare
15
Unassigned Code
Table 244
Digital pad values and offset allocations (Part 2 of 2)
Digital pad values and offset allocations (Part 2 of 2)
PAD SET 0
PAD SET 1
Offset
PAD
Offset
PAD