Multi-Tech Systems MMV1600 owner manual Rd Off

RD LEDs ON		2.	Connect composite link cable
between mux and modem.
Composite link and all	1. Mux memory failure	1.	Enter ATL and record all channel
channels down with			parameters before running memory
RD and all channel			test. Perform memory test by entering
RCV LEDs ON			&T2 command. All stored
parameters will be destroyed.
		2.	Reconfigure all channel parameters.
		3.	Call Tech Support for assistance,
refer to Chapter 8.
Flashing RXT LED	1. High error rate on	1. View composite link statistics using
	communication line		#S command, refer to Chapter 5.
	Table 7-1. Data Troubleshooting Guide(Continued)
Condition	Possible Cause			Corrective Action
Flashing RXT LED	1. High error rate on	2.	Perform local and remote loopback		(Continued)
communication line	test, refer to the Local and
			Communications Line Testing in this
			Chapter.
		3.	Call phone company and verify
			communication line.
		4.	Call Tech Support for assistance,
refer to Chapter 8.
All channel devices not	1. Incorrect channel	1.	Verify channel parameter settings for		communicating with
parameter settings	all channels, refer to Chapter 5 for the			mux, composite link up	C0
command.
with CO, CTS, XMT and
RCV LEDs ON and		2. Change channel parameters to match
RD OFF			channel devices. Refer to Chapter 5
for Channel Paramater Commands.
		3.	Perform channel device testing, refer
to Channel Device Testing in this				Chapter.
		4.	Call Tech Support for assistance,
refer to Chapter 8.
	2.Channel devices	1. Refer to cabling diagrams of both mux			incorrectly
cabled	and channel devices.
		2.	Call Tech Support for assistance,
refer to Chapter 8.
Some channel devices	1. Incorrect channel	1.	Verify channel parameter settings for
not communicating	parameter settings		for those channel devices, refer to Lx
with MultiMux and	for those channel devices		command in Chapter 5 to display
composite link up			channel parameters.
		2.	Perform channel device testing, refer
to Channel Device Testing in this				Chapter.
		3.	Call Tech Support for assistance,
refer to Chapter 8.
	Table 7-1. Data Troubleshooting Guide(Continued)

Condition	Possible Cause
Some channel devices 2.	Incorrect cabling for those
not communicating	channel devices
with MultiMuxand
composite linkup
refer to Chapter8.
Channel device losing 1.	Flow control not properly
data	set.

F2 and F5-F6commands in

Corrective Action

1.Refer to cabling diagrams of both mux and channel devices.

2.Call Tech Support for assistance,

1.Verify flow control operations for the selected channel device, refer to F0-

Chapter 5.