
Troubleshooting operational problems 17-11
AML problems
Standard 1.0 Modular Option EC Installation and Maintenance Guide November 1999
codes (including ESDI/MSDL and LNK codes), see the
SL-1 Maintenance Manual (NTP 553-2301-511).
ESDA error messages
n = AML number. See prompt ADAN in Overlay 17.
t = The system time.
x = The reason that the error code was issued.
ESDA 001 n t x ISDN/AP link n is down. The reason is indicated by x.
x = 6 ESDI/MSDL HDLC hardware failure.
Action: Check for AML (ISDN/AP) (CSL) SEERs.
Important SEERs are
25-50 - Layer 2 status code
25-60 - Layer 2 function return code
x = 7 ESDI/MSDL HDLC detected link 3 failure, or far-end disconnect. This may
be a transient problem. The ISDN/AP link should recover.
Action: If the link does not recover, check for Meridian Mail problems.
Important SEERs are
25-50 - Layer 2 status code
25-60 - Layer 2 function return code
x = 8 HDLC Link Layer Restarted.
Action: This may occur once or twice during AML (ISDN/AP) link startup.
If the link does not come up, check for Meridian Mail problems.
Important SEERs are
25-50 - Layer 2 status code
25-60 - Layer 2 function return code
ESDA 002 n t The ISDN/AP link n link layer is connected.
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