Toshiba CTX28 用户手册
T1
RDTU3 - T1 Interface Unit
8-2
Strata CTX I&M 06/04
RDTU3 - T1 Interface Unit
System:
CTX100 & 670
Circuits per PCB:
8, 16, 24 channels per PCB
Interfaces with:
Ground / Loop start CO lines DID or TIE lines (Wink or Immediate)
Older Version(s):
RDTU1, RDTU2
The RDTU3A has an RS-232C port to trace data that is transmitted between the CTX system CPU
and the RDTU3A. This PCB also enables T1 line alarm data to be monitored.
and the RDTU3A. This PCB also enables T1 line alarm data to be monitored.
T1 Framing: D4 (SF) or ESF
Line cording: AMI with ZCS or B8ZS
Digital PAD: Transmit side +3dB to -15dB. Receive side +3dB to -15dB (software controlled)
Figure 8-1
RDTU3 PCB
Table 8-1
RDTU3 Controls, Indicators, and Connectors
Control/Indicator/
Connector
Type of Component
Description
SW4~SW6 Equalizer Setting
Switch
Switch
Jumper switches
).
SW8, SW9
Jumper switches
Used for Self Test and CSU Test or for non-
loop back normal operation (see also
loop back normal operation (see also
SW10
3-terminal jumper plug
IC19
External ROM upgrade
Provides external ROM option (see
).
RS-232C
Connector for
Call Data
Monitor (RJ-12)
Connector for
Call Data
Monitor (RJ-12)
J1
J2
6351
Backplane
Connector
Connector
OFF
EQ
ON
SW4
R28
OFF
EQ
ON
SW5
R28
OFF
EQ
ON
SW6
R28
O
F
F
LB
ON
SW8
C
P
U
ROM
SW10
O
F
F
LB
ON
SW9
RDTU3A
FSYNC
MFSYNC
BALM/AIS
YALM/RAI
YALM/RAI
LOS
BSY
BSY
PSYNC
SSYNC
SSYNC
MONITOR
Status/Alarm LEDs
FSYNC
MFSYNC
BALM/AIS
YALM/RAI
LOS
BSY
PSYNC
SSYNC
OFF
EQ
ON
SW4
R28
OFF
EQ
ON
SW5
R28
OFF
EQ
ON
SW6
R28
O
FF
LB
ON
SW8
C
P
U
ROM
SW10
O
FF
LB
ON
SW9
IC19
RJ-45
8-pin Modular
Network/CSU
Interface Jack
8-pin Modular
Network/CSU
Interface Jack