PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 131

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Table 10
Q.921
Management Entity Actions for MDL Error Indications (cont’d)
Error Type
Note 1: For the description of the affected states see Annex B.
Note 2: According to Q.921 § 5.8.5 this error code will never be generated.
Reactions of the ISAC-S and Necessary Software Reactions
As the auto- mode is only to be used in states 7, 8 and as it has to be switched to non-auto
mode where in states 1-6, we do not have to deal with error code G and H.
Conclusion:
For your error-processing with ISAC-S we suggest to implement the software design shown in
the following figures 60 through 64 into your interrupt service routine.
Semiconductor Group
Other
A) The ISAC-S does not react at all (our implementation). The software is not informed, as
B) see 4.2a)
C) "
D) "
E) "
F) "
I) see further Criteria Leading to a Reestablishment
J) see Frame Rejection Condition
K) see further Criteria Leading to a Reestablishment
L) see Frame Rejection Condition
M)
N) see Frame Rejection Condition
O) only internal software timer, no device action.
no action is mandatory according to Q.921.
Error
Code
J
K
L
M
Note 2)
N
O
(see
Error
Condition
N(R) Error
Receipt of
FRMR
response
Receipt of non-
implemented
frame
Receipt of I-field
not permitted
Receipt of
frame with
wrong size
N201 Error
131
7, 8
Affected
States
7, 8
4, 5, 6, 7, 8 Error log
4, 5, 6, 7, 8 Error log
4, 5, 6, 7, 8 Error log
4, 5, 6, 7, 8 Error log
Network
Management
Action
Error log
Error log
Functional Description
User
Management
Action
Dependent on
implementation
Dependent on
implementation
Dependent on
implementation
Dependent on
implementation
Dependent on
implementation
Dependent on
implementation