• Card-LAN / echo / test port interface
• 80C51FA Microcontroller
DS-30X interface
NTBK50 interfaces to one DS-30X bus which contains 32-byte interleaved timeslots operating
at 2.56 Mb. Each timeslot contains 10 bits in A10 message format; eight are assigned to voice/
data (64 Kbps), one to signaling (8 Kbps), and one is a data valid bit (8 Kbps).
The incoming serial bit stream is converted to 8-bit parallel bytes to be directed to padding
control. The signaling bits are extracted and inserted by the A07 signaling interface circuitry.
Timeslots 0 and 16 are currently unused for PCM.
Digital PAD
The software selects A-Law or µ-Law and one of 32 possible PAD values for each channel.
These values are provided in a PROM through which the data is routed. The idle code for A-
Law is 54H and for µ-Law is 7FH. The unequipped code is FFH for both A-Law and µ-Law.
As the idle code and unequipped code can be country dependent, the software instructs the
NTBK50 to use different codes for each direction. The 32 digital pads available are illustrated
in
Table 238: Digital Pad - values and offset allocations
on page 555. The values shown are
attenuation levels (1.0dB is 1 dB of loss and –1.0 dB is 1 dB of gain.
Table 238: Digital Pad - values and offset allocations
PAD SET 0
PAD SET 1
Offset
PAD
Offset
PAD
0
0.6 dB
0
0.0 dB
1
1.0 dB
1
-1.0 dB
2
2.0 dB
2
-2.0 dB
3
3.0 dB
3
-3.0 dB
4
4.0 dB
4
-4.0 dB
5
5.0 dB
5
-5.0 dB
6
6.1 dB
6
-6.0 dB
7
7.0 dB
7
-7.0 dB
8
8.0 dB
8
-8.0 dB
9
9.0 dB
9
-9.0 dB
10
10.0 dB
10
-10.0 dB
11
11.0 dB
11
spare
Architecture
Circuit Card Reference
July 2011 555
Summary of Contents for 1000 Series
Page 1: ...Circuit Card Reference Nortel Communication Server 1000 7 0 NN43001 311 04 04 July 2011 ...
Page 20: ...20 Circuit Card Reference July 2011 ...
Page 30: ...Introduction 30 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 116: ...Option settings 116 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 143: ...Figure 25 CP PIV card front Physical description Circuit Card Reference July 2011 143 ...
Page 148: ...NT4N39AA CP Pentium IV Card 148 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 287: ...Figure 86 Clock Controller Option 3 Operation Circuit Card Reference July 2011 287 ...
Page 302: ...NT5K21 XMFC MFE card 302 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 346: ...NT6D80 MSDL card 346 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 353: ...Figure 96 NTDK16 DLC Functional description Circuit Card Reference July 2011 353 ...
Page 461: ...Figure 147 Paging trunk operation Applications Circuit Card Reference July 2011 461 ...
Page 462: ...NT8D15 E and M Trunk card 462 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 500: ...NTAK09 1 5 Mb DTI PRI card 500 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 512: ...NTAK10 2 0 Mb DTI card 512 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 534: ...NTAK79 2 0 Mb PRI card 534 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 550: ...NTBK22 MISP card 550 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 560: ...NTBK50 2 0 Mb PRI card 560 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 595: ...Figure 165 MGC block diagram Introduction Circuit Card Reference July 2011 595 ...
Page 662: ...NTRB21 DTI PRI DCH TMDI card 662 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 668: ...NTVQ01xx Media Card 668 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 700: ......