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- Mnfr. Part #: RCOU3 / RCOS3
- 4 circuit loop start CO line interface unit
- RCOS3A 4 Port Loop Start CO Subassembly Card
- The RCOS3 is a piggy back board that clamps to a Toshiba RCOU3 card and the combination will make an 8 port CO card that consumes only one slot
- Compatibility: CTX100, CTX670
- Condition: Refurbished
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