Toshiba CTX28 manual Remote Expansion Cabinet Unit, Remote Expansion Cabinet Connection

Strata CTX670 Installation

Remote Expansion Cabinet Unit

Remote Expansion Cabinet Unit

The RRCU1A PCB enables a CTX670 Expansion Cabinet to be located up to three kilometers from its Base Cabinet. One RRCU1A connects to up to two ribbon-type Data Cables and applies the inter-cabinet signal to a fiber-optic pair. One fiber pair can support one or two expansion cabinets in one remote location using one RRCU1A in the Base Cabinet and another in the Remote Expansion Cabinet.

Local CTX Cabinets

Expansion Cabinet (2)

1 (M1)

2		2	(S1)
		3	(M2)
3
4	4 (S2)	Optical Module
5
6
7			Base Cabinet

A CTX670 Base Cabinet will support up to six RRCU1A PCBs. A CTX670 will support up to six Remote Expansion Cabinets.

An inter-cabinet Data Cable in the Base Cabinet is attached to an RRCU1A which converts the signal and uses an LED source to apply the signal to 500 MHz/km multi-mode fiber. Another RRCU1A in the Remote Expansion Cabinet receives the LED signal, converts it back to

Remote CTX Cabinets

MSBU
Remote Expansion Cabinet (4)
1 (M1)
2 (S1)	Optical
3 (M2)
	Module
4 (S2)

Remote Expansion Cabinet (3)

5820

Fiber Optic

Connection

Up to

3Kilometers (Dealer Supplied)

its original form and applies it to a ribbon Data Cable connected to the Remote Expansion Cabinet. See Figure 4-38.

Figure 4-38 Remote Expansion Cabinet Connection

This is a hardware solution and has no effect on software or administration. Remote cabinets support all line and trunk interfaces.

Important! Network clock signals can only be derived from digital trunk PCBs, such as the RDTU and RPTU, that are installed in the Base Cabinet (Master) location. Do not install these digital trunk cards into the Remote Cabinets.

RRCU1A cards are used at both the Base (Master) and Remote (Slave) Cabinet locations. The card set consists of an RRCU1A PCB and its ROMS1A daughter board. The RRCU1A connects to the inter-cabinet Data Cables, holds the Remote/Slave option jumpers, and has an RS-232C port for monitoring the fiber connection. (See Figure 4-41.)

The ROMS1A daughter board holds an SC-type fiber connector, a connector for control of two 8-circuit DPFT units, and status LEDs.

Strata CTX I&M 06/04 4-55