ADTRAN L128T user manual If YOU are Unable to Connect Calls, Troubleshooting Calls

Chapter 4: Troubleshooting

IF YOU ARE UNABLE TO CONNECT CALLS

See Table 4-A for corrective actions if you cannot connect calls.

	Table 4-A
	Troubleshooting Calls
Condition	Corrective Action
The PWR LED remains on, but	Most likely a problem exists in the software setup (translation) at the
calls cannot be placed.	CO switch, or the network setup in the Express L128.
Local voice calls can be trans-	The line is probably not set up to support data calls.
mitted, but data calls to the
same exchange cannot.
Local data calls go through,	Ensure the far end is working. If not already doing so, place the call
but long distance data calls	explicitly specifying the prefix of the long distance service (for exam-
do not.	ple, 10288 for AT&T). If this does not work, then most likely the
	problem is that the long distance service provider is not providing
	long distance access.
Single B-channel calls can be	There is most likely a problem in the software setup (translation) at the
made, but two B-channel calls	CO switch, or the network setup in the Express L128.
cannot.	If the line has two phone numbers, make sure the second SPID and
	LDN are entered correctly in SPID2 and LDN2 in the Express L128.
	Check with the local service provider to ensure that the line supports
	two data calls. The Express L128 status log buffer shows what
	sequence of events occurred. What you need to know is which
	piece of equipment first caused the Multilink PPP process to termi-
	nate. The status logs from both ends may be necessary to determine
	this.

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