Pelco C1977M-D User Manual

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      Pelco Manual C1977M-D (6/02)

The PelcoNet Transmission System uses a compact design. One reason for the compact design is that
connectors are placed on both the front and rear panels. The front panel connectors are dedicated to the
media interfaces (video, audio, and data). They are shown in Figure 1.

Key:
1 = Green power LED (blinks slowly when connected to another PelcoNet Transmission System unit)
2 = RS-232 transparent data port for connecting to peripheral equipment
3 = Handset port (only with audio option)
4 = Audio line output  (only with audio option)
5 = Audio line input  (only with audio option)
6 = Video input (for transmitter) or video output (receiver)

Figure 1.  Front Panel Connectors

Audio connectors 3, 4, and 5 only function on units equipped with the optional audio interface. Other than
audio, there is no difference in features between regular and audio-equipped units; therefore, all informa-
tion given for the basic transmitter and receiver units also applies to models with audio capability.

The green power LED lights as soon as you apply power to the unit.

The serial interface for transparent data transmission only provides serial send (pin 3) and receive (pin 2)
signals and ground (pin 5). No hardware flow control signals are provided.

The handset interface lets you directly connect a telephone handset. Either the handset or the line inter-
face is active at any given time. Selection of the interface is described in the 

 section. For a

detailed description of the audio interface, see the 

 section.