Toshiba CTX28 manual RDTU3 T1 Interface Unit, RDTU3 PCB

T1

RDTU3 - T1 Interface Unit

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.

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)

Table 8-1 RDTU3 Controls, Indicators, and Connectors

Control/Indicator/	Type of Component	Description
Connector
SW4~SW6 Equalizer Setting	Jumper switches	Sets the line length between RDTU and CSUs
Switch		or other T1 (see also Table 8-6).
		Used for Self Test and CSU Test or for non-
SW8, SW9	Jumper switches	loop back normal operation (see also Table
		8-5).
SW10	3-terminal jumper plug	See Table 8-3.
IC19	External ROM upgrade	Provides external ROM option (see Table 8-3).

Status/Alarm LEDs

FSYNC

MFSYNC

BALM/AIS

YALM/RAI

LOS

BSY

PSYNC

SSYNC

RJ-45

8-pin Modular

Network/CSU

Interface Jack

FSYNC

MFSYNC

BALM/AIS

YALM/RAI

LOS

BSY

PSYNC

SSYNC

J2

	ON		ON
R28		R28
EQ		EQ
SW4	OFF	SW5	OFF
ON
SW8		LB
OFF
ON
SW9		LB
OFF

	ON
R28
EQ
SW6	OFF
	ROM
	SW10
	CPU

IC19

	ON
R28
EQ
SW4	OFF
ON
SW8
OFF

	ON
R28
EQ
SW5	OFF

LB

	ON
R28
EQ
SW6	OFF
	ROM
	SW10
	CPU

RS-232C		J1
Connector for
	MONITOR
Call Data
Monitor (RJ-12)

RDTU3A

Backplane

6351 Connector

ON

SW9

OFF

LB

Figure 8-1 RDTU3 PCB

8-2 Strata CTX I&M 06/04