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Chapter 1: Specifications
• To connect to a serial printer (or any other DTE instead of DCE device), you need a null-modem cable (cross-over cable)
between the CON module and the device.
Operation of several devices:
The serial interface transmits six signals (three for each direction). Normally, four of the six signals are handshake signals (in
addition to RxD and TxD). The following configurations, however, are possible using special adapter splitting cables:
• Three single 2-wire transmissions.
• Two transmissions with a handshake signal.
• A serial mouse and a single 2-wire transmission.
In this case, choose X-ON/X-OFF software handshake for traffic control at the printer and PC.
• Connection Format: DTE (Data Terminal Equipment)
• Speed: Up to 19,200 Baud
• Data Format: Format independent
• Data Transmission:
- RxD (Receive Data)
- TxD (Transmit Data)
• Traffic Control: The following signals are transmitted (hardware handshake):
- RTS (Request To Send)
- CTS (Clear To Send)
- DTR (Data Terminal Ready)
- DSR (Data Set Ready)
1.1.12 Serial Interface RS-422
KVM Extenders with a serial interface RS-422 (DB9) support a differential full-duplex transmission up to a Baud rate of 115,200
Baud.
The CPU unit is designed as controlling device and can, for example, be connected directly to video or media servers.
The CON unit is designed as a controlled device and so can be connected directly to remote controllers.
Table 1-1. Serial interface specifications.
Specification
Description
Connection Format
DTE (Data Terminal Equipment)
Speed
Up to 115,200 baud
Data Format
Format independent
Data Transmission
• RxD (Receive Data)
• TxD (Transmit Data)
Traffic Control
The following signals are transmitted (hardware handshake):
• RTS (Request to Send)
• CTS (Clear to Send)
• DTR (Data Terminal Ready)
• DSR (Data Set Ready)