Aurora Multimedia 4520CPR User Manual download pdf (Page 55)

Vanguard Multiport 4520CP Controller User’s Guide A-7

Synchronous Serial Cables

FIGURE 10. Asynchronous Null Modem Cable (DTR Handshaking)

See your device manual to determine what type of null-modem cable is required.

Note that all three cables shown here can support XON/XOFF software flow con-

trol since pins 2, 3, and 7 are wired the same way.

Synchronous Serial Cables

Vanguard Multiport controllers offer full support for synchronous communications.

For successful synchronous cabling, you must carefully consider what pins your

clock signals are on. You must ensure that there is a single clock source for both the

transmitter and receiver of data.

Connecting Synchronous Modems

Since all clock signals are brought out on their standard pins, you can use the

straight-through modem cables shown in Figure 11 to connect synchronous

modems to the Vanguard Multiport controllers. No adaptors are necessary.

Vanguard Multi-

port Connector

Peripheral

Connector

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Aurora Multimedia 4520CPR User Manual Page 55