Multi-Tech Systems MMV1600 owner manual Cannot communicate

interface connector type.
	3. Voice/fax ribbon cable	1. Reconnect the voice/fax ribbon cable			not connected.
	between the voicefax and aggregate				board. Refer to the
installation				procedures in Chapter 4.
		2.	Call Tech Support for assistance,
refer to Chapter 8.
	4. MV2 Board failure	1.	Perform the voice/fax loopback test
(test 12), refer to voice/fax channel				testing procedures in this chapter.
		2.	Call Tech Support for assistance,
refer to Chapter 8.
A voice/fax channel	1. Voice/fax channel	1.	Verify that the voice/fax channel is
cannot communicate	configuration problem.		configured for the correct node and
with the remote site			channel destinaton and composite
link. Use the VL command to view				the voice/fax channel parameters,
	refer to Chapter 5.
	Table 7-2. Voice/Fax Troubleshooting Guide (Continued)
Condition	Possible Cause			Corrective Action
A voice/fax channel	2. Wrong type of telephone	1.	Ensure that the telephone cord		cannot communicate
cord.	connected to the voice/fax channel is			with the remote site	an RJ11 for
the FXO and/or FXS	(Continued)			connector(s) or E&M cable for the
	E&M 1-5 connection.
No voice/fax	1. Frame ground not	1.	Attach PBX ground to MultiMux frame
communication	connected to PBX		ground screw.
E&M to E&M	2. Voice/fax configuration	1.	Verify that voice/fax channel is		problem.
configured properly, (E&M, wink or				dial tone, 2 or 4 wire, E&M type).
	3. Incorrect E&M cabling.	1.	Verify connection of E&M cable to
PBX. See Appendix D as well as				PBX documentation.
		2.	Verify that XSG LED lights when PBX
asserts the M lead and that RSG				LED lights when MultiMux asserts
			the E lead.
Voice sounds broken	1. Excessive errors on	1. Examine composite statistics for up or grabled at times
composite link.	errors.
		2.	Perform local and remote loop back
tests to determine failing unit or bad				communication line.
		3.	Call phone company and
communication line.
		4.	Call Tech Support for assistance,
refer to Chapter 8.