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PCB Installation
RCOU3A, RCOS3A – Four-Circuit Loop Start CO Line Interface Unit
Strata CTX I&M 06/04 6-25
PCB Installation
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.
³ 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/
Connector
Type of Component Description
CO line circuit 1~4 indicators Red LED
Lights to indicate that line circuit is in operation.
(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)
2-position slide switch
Enables -3dB signal level drop for CO line
circuit.
Pad switch SW201 (circuit 2)
Pad switch SW301 (circuit 3)
Pad switch SW401 (circuit 4)
RCOS connector P11, P12,
P13, P14
10-pin male connector
Interface connector for RCOS 4-circuit loop
start CO line unit.
Mu Law/A Law jumper plug
P2
(RCOU3A only)
3-terminal jumper
No jumper plug is the default for the U.S. and
Canada. For countries requiring A Law, insert
the jumper plug (provided in the PCB box) on
the A Law side.