Maintenance-Object Repair Procedures
555-233-143
8-1202 Issue 1 May 2002
l. Error type 3841 indicates that the downlink buffer on the circuit pack has
overflowed. No action is necessary.
m. A DCP endpoint may have been disconnected.
n. Make sure the data module is connected and operating properly. Check for
faulty wiring. If necessary, reduce the length of the cable between the data
module and the switch to 5000 ft. for 24-gauge wire or 4000 ft. for
24-gauge wire.
If the problem still exists, replace the circuit pack. Once the problem has
been resolved, the alarm will be retired in 60 minutes (90 min. for error
1537). (These error counters use the leaky bucket mechanism.)
The DA module is not phantom-powered from the port. Thus when it is in
linked mode, its range is limited by the Italtel digital phone’s limit: 0.7 Km
(2300) ft. on 26-gauge wire or 1.8 Km (5900) ft. on 22-gauge (0.6 mm)
wire. If in stand-alone mode, it is limited by the maximum length of loop
allowed from the Digital Line Interface (DLI) component: up to 3.5 Km (2
miles) on 22-gauge (0.6 mm) wire.
System Technician-Demanded Tests:
Descriptions and Error Codes
Always investigate tests in the order presented in the table below. For example,
by clearing error codes associated with the Data Module Internal Loop-around
test (#175), you may also clear errors generated from other tests in the testing
sequence.
Order of Investigation
Short Test
Sequence
Long Test
Sequence D/ND
1
1. D = Destructive; ND = Nondestructive
Data Module Internal Loop-around test (#175) X ND
Digital Port Board Network Processing Element Crosstalk
test (#9)
XND
Port Circuit Information Channel and Control Channel
Loop-around test (#13)
XND
Data Module Audits test (#17) X X ND
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