Toshiba CTX28 manual Rcou Installation, To install an RCOU3A or RCOU1A PCB

PCB Installation

RCOU3A, RCOS3A – Four-Circuit Loop Start CO Line Interface Unit

RCOU Installation

Note The decibel (dB) Pad switches SW101, SW201, SW301, and SW401 control excessive loudness resulting from close proximity to a Central Office or PBX telephone office by providing a -3 dB signal level drop to, or from, the PBX or CO when set to the 3 position. Switches are factory-set to the 0 (0 dB signal level drop) position.

To install an RCOU3A or RCOU1A PCB

1.If the Strata CTX system is within one mile of the PBX or Central Office, set the RCOU dB Pad switches SW101, SW201, SW301, and SW401 to the 3 (-3 dB signal level drop) position.

2.(RCOU3A only) For Mexico, the U.K, or Asia, insert the short jumper plug on the A Law side. For the U.S. and Canada, no plug is required. (No plug is the Mu Law assignment).

3.Insert the RCOU (component side facing right) into the appropriate slot and apply firm, even pressure to ensure proper mating of connectors. PCOU2 can be installed in place of RCOU, see the appropriate Configuration chapter.

4.After installing the RCOU, gently pull the PCB outward. If the connectors are properly mated, a slight resistance is felt.

Table 6-12 RCOU3A and RCOU1A Controls, Indicators, and Connectors

Control/Indicator/	Type of Component	Description
Connector
		Lights to indicate that line circuit is in operation.
CO line circuit 1~4 indicators	Red LED	(CO line indicator will not light unless RCOU is
		connected to a CO line).
J1 connector	Modular connector	Interface connector for CO line circuits 1 and 2.
J2 connector	Modular connector	Interface connector for CO line circuits 3 and 4.
Pad switch SW101 (circuit 1)
Pad switch SW201 (circuit 2)	2-position slide switch	Enables -3dB signal level drop for CO line
		circuit.
Pad switch SW301 (circuit 3)
Pad switch SW401 (circuit 4)
RCOS connector P11, P12,	10-pin male connector	Interface connector for RCOS 4-circuit loop
P13, P14		start CO line unit.
Mu Law/A Law jumper plug		No jumper plug is the default for the U.S. and
		Canada. For countries requiring A Law, insert
P2	3-terminal jumper
		the jumper plug (provided in the PCB box) on
(RCOU3A only)
		the A Law side.

PCB Installation

Strata CTX I&M 06/04 6-25