Multi-Tech Systems DT101 3 Data Channel Troubleshooting, Async Data Channel, Sync Data Channel

DataTalker Owner’s Manual

Table 7-3 Data Channel Troubleshooting

ProblemPossible CausesSolution

Async Data Channel

Channel Device not	Incorrect channel parameter	1.	Verify configuration of data
communicating with DataTalker;	settings		port (see Data Port
composite link up with CD,,			Configuration in Table 7-10).
CTS, XMT, RCV and RD LEDs		2.	Call Tech Support for
on
			assistance (see Chapter 8).
	Channel device incorrectly cabled	1.	See cabling diagrams in
			Appendix B and C on both
			DataTalker and data channel
			device.
		2.	Call Tech Support for
			assistance (see Chapter 8).
Async Data Channel device	Flow control not properly set	1.	Verify flow control options for
losing data			the async data channel device
			(see Table 7-10).

Sync Data Channel

Channel Device not communicating with DataTalker; composite link up with CD,, CTS, XMT, RCV and RD LEDs on

Incorrect channel parameter settings

Channel device incorrectly cabled

Incorrect Data Type

Incorrect Clocking

1.Verify configuration of data port (see Data Port Configuration in Table 7-10).

2.Call Tech Support for assistance (see Chapter 8).

1.See cabling diagrams in Appendix B and C on both DataTalker and data channel device.

2.Call Tech Support for assistance (see Chapter 8).

1.Verify that sync device uses HDLC or SLDC protocol, NRZ encoding, and operates in full duplex.

1.If sync device expects clock to come from DataTalker on pins 15 and 17, set DataTalker sync data channel to internal clocking and set speed.

2.If sync device provides click to DataTalker on pin 24, confiugre sync data channel for external clocking.

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