NT8D09 Analog Message Waiting Line Card
Page 217 of 290
Line cards
Description
Figure 61
Analog message waiting line card—block diagram
Input/output
interface
control
Micro-
controller
DS-30X
interface
5.12 MHz
clock
Tx PCM
Async card
LAN link
Front
panel
LED
Card LAN
interface
Line interface unit power
Rx PCM
1 kHz
frame sync
Card slot
address
Backplane
Controller
card
Line
signaling
interface
Control
logic
Reg
Signaling
and status
Address/
data bus
553-6168
Power
supplies
Ring
generator
–150 V dc
light
power
+8.5 V dc
+ 5 V dc power
Reg
+15 V dc
+12 V dc power
Ringing
– 48 V dc
battery
Rsync
XFMR
Signaling relays
(ringing, battery
reversal)
Line interface units 0–3
Tip
Ring
Analog
telephone
lines
Loop current/
dialpulse detect
Message
waiting
XFMR
Signaling relays
(ringing, battery
reversal)
Line interface units 4–7
Tip
Ring
Analog
telephone
lines
Loop current/
dialpulse detect
Message
waiting
XFMR
Signaling relays
(ringing, battery
reversal)
Line interface units 8–11
Tip
Ring
Analog
telephone
lines
Loop current/
dialpulse detect
Message
waiting
XFMR
Signaling relays
(ringing, battery
reversal)
Line interface units 12–15
Tip
Ring
Analog
telephone
lines
Loop current/
dialpulse detect
Message
waiting
Analog
hybrid
Analog
hybrid
Analog
hybrid
Analog
hybrid
PCM
Codec
PCM
Codec
PCM
Codec
PCM
Codec
Summary of Contents for NT1R20
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Page 4: ...iv 553 3001 105 Standard 5 00 June 1999 iv ...
Page 12: ...xii Contents 553 3001 105 Standard 5 00 June 1999 ...
Page 76: ...Page 52 of 290 Description 553 3001 105 Standard 5 00 June 1999 ...
Page 154: ...Page 130 of 290 NT5D11 Line side T1 Interface Card 553 3001 105 Standard 5 00 June 1999 ...
Page 276: ...Page 252 of 290 QPC452 Basic 500 2500 Analog Line Card 553 3001 105 Standard 5 00 June 1999 ...
Page 306: ...Page 282 of 290 List of terms 553 3001 105 Standard 5 00 June 1999 ...
Page 314: ...Page 290 of 290 553 3001 105 Standard 5 00 June 1999 ...
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