High speed communication interface, Installation, Cabling – Visara SCON-25L Reference Manual User Manual
Page 29: High speed communication interface -19, Installation -19 cabling -19, Chapter 2. installation
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Chapter 2. Installation
High Speed Communication Interface
The High Speed Communications (HSC) board provides a high-speed-remote
communications interface to SDLC and Frame Relay Networks. Each HSC board
provides up to four high speed channels.
Installation
Refer to Chapter 2, Installing/Removing PCBs.
WARNING
The 25S Communications Server must be powered off before connecting or
disconnecting the HSC adapter cable or the PLIMs. Failure to do so may result in
damage to the hardware.
Cabling
The HSC feature includes an HSC Adapter Cable (HAC). One end attaches to the
HSC board, the other end splits into four connectors. Each connector provides a
communication line capable of operating at full-duplex speeds up to 8 Mbps.
The physical layer interface type is selected using a physical layer interface module
(PLIM) and one of four HSC communication cables. The PLIM1 supports either RS232
or V.35 communication protocol. The type cable used determines the protocol type.
Any combination of PLIMs and/or cables may be connected to the HSC board.
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Note: The cable assemblies supplied for use with the HSC board and PLIMs are
proprietary cables that may include EMI suppression components. For correct
operation and continued agency compliance do not substitute any other cables.
The DCE cables allow direct connection to DTE devices; no modem or modem
eliminator is required. When a DCE interface is selected, the HSC should be
configured to generate the transmit clock. Baud rates up to 1 Mbps are supported
and configured on the HSC line panels.