Functional Description
Further Possible Error Conditions
Appendix II of Q.921: Further Possible Error Conditions
Table 10
Q.921
Management Entity Actions for MDL Error Indications
Error Type
Error
Code
Error
Condition
Affected
States
Network
Management Management
User
Action
Action
A
B
C
Supervisory
(F = 1)
7
Error log
Dependent on
implementation
DM(F = 1)
7, 8
4, 7, 8
Error log
Dependent on
implementation
UA(F = 1)
TEI removal
procedure or
TEI check pro-
cedure; then, if
TEI:
– free, remove
TEI
– single, no ac-
tion multiple:
TEI removal
procedure
Receipt of
unsolicited
response
TEIidentityverify
procedure
or
D
UA(F = 1)
4, 5, 6, 7, 8
remove TEI
E
F
Receipt of DM
response (F = 0)
7, 8
7, 8
Error log
Dependent on
implementation
Peer initiated
RE-
establishment
SABME
SABME
DISC
Error log
Dependent on
implementation
G
H
5
6
TEI check
procedure;
then, if TEI:
– free, remove
TEI
– single, no ac-
tion multiple:
TEI removal
procedure
TEIidentityverify
procedure
or
Unsuccessful
Re-
transmission
(N200 times)
remove TEI
I
Status Inquiry
8
Error log
Dependent on
implementation
Semiconductor Group
130
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