H19-410_V1.0 · Question #225
What interfaces does the enhanced MSTP built-in PCM support? (Multiple Choice)
The correct answer is A. FXS/FXO B. RS232 C. CV35. Enhanced MSTP built-in PCM boards support FXS/FXO (A), RS232 (B), and CV35 (C) because these three interface types collectively cover analog voice, serial data, and co-directional/video signaling - the standard service mix the enhanced variant is designed to aggregate onto a…
Question
What interfaces does the enhanced MSTP built-in PCM support? (Multiple Choice)
Options
- AFXS/FXO
- BRS232
- CCV35
- D6x2/4-line voice/E&M
How the community answered
(54 responses)- A81% (44)
- D19% (10)
Explanation
Enhanced MSTP built-in PCM boards support FXS/FXO (A), RS232 (B), and CV35 (C) because these three interface types collectively cover analog voice, serial data, and co-directional/video signaling - the standard service mix the enhanced variant is designed to aggregate onto a transport network. FXS/FXO handles analog telephone connections (station and exchange sides), RS232 enables low-speed serial data services, and CV35 (V.35) provides high-speed synchronous data or video signaling. Option D (6x2/4-line voice/E&M) is the distractor: E&M is a legacy trunk signaling interface found on basic or separate PCM voice boards, not on the enhanced built-in PCM module, which focuses on the broader multi-service interface set. A useful memory tip: think "ARC" - Analog voice (FXS/FXO), RS232 serial, CV35 data/video - the three interface categories the enhanced board covers, leaving E&M to older, standalone voice-only equipment.
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