User`s guide

6(44)
Datum/Date Rev
Dokumentnr/DocumentnrUppgjord/Prepared
Dokansv/Godkänd - Doc respons/Approved Kontr/Checked Tillhör/Referens-File/Reference
99-07-15 G
268/155 34-ASB 150 02 Uen
FACILITY DESCRIPTION
Faktaansvarig - Subject responsible
1920
CRC4 check
This command is used to define the mode of Cyclic
Redundancy Check (CRC4) for ISDN Primary Rate
Access (PRA).
CRC-4 procedure for multiframe alignment and bit
error monitoring is designed to supervise if frame
alignment has been lost and if the bit error rate is
within a specified range.
There are two modes of operation:
Automatic - The equipment adapts itself to the
operation of the network. This will be
used in most markets.
Permanent - This is used when the network does not
support the automatic function.
Valid data: 0 =Automatic selection (by layer 1)
1 =CRC4 proc. permanently
enabled
2=CRC4 proc. permantently
disabled
3=market dependent parameter *
Default data: 3
* This value is related to the value of command 1911.
1921
Ignore inband info
This command states whether inband information,
which is available after disconnect, shall be ignored
and immediate call clearing shall be initiated, or if the
inband information shall be transmitted to the user.
Valid data: Yes/No
No
Inband information is ignored
(the call is immediately released)
Ye s
Inband information is not ignored
(the user receives the inband
information)
Default data: Yes
1946
Message after timeout.
This command states whether a CONNECT or
ALERTING message shall be sent 8 seconds after
CALL PROCEEDING to the network. This function is
not used when the systems answers with one of the
above mentioned messages within 8 eight second .
The function iis used to stop the ISDN timer T303 and
forces the originating network to through connect the
B-channel in order to give the caller the possibility to
hear tones or announcements provided by the
terminating party.
Valid data: No
Connect
Alert
Default: Connect
The choice of CONNECT or ALERTING is network
dependent.