Table of Contents
Advertisement
7-22 Feature interaction
Data call cause handling
For all data calls, the DMS-250 propagates the non-normal cause parameter
or cause information element received in one of the following messages
from the terminating agency:
The non-normal cause parameter or cause information element received is
propagated unchanged to the originating agency when
Data call cause handling requires that office parameter
CSE_TRTMT_ENHANCEMENTS is set to "N."
Figure 7-7 shows cause value handling for data calls.
297-2521-106 Standard 23.01 March 2001
— If no BC was received, the BC of SPEECH is sent with the outgoing
SETUP message.
— If the BC is 3.1 kHz, the BC of SPEECH is sent. If the originating
BC is 56 kbit/s, 64 kbit/s, or 3.1 kHz, the BC is passed unchanged.
non-PRI origination
— If the DIGITAL field in the trunk group is set to YES, the BC of
SPEECH is sent with the outgoing SETUP message.
— If the DIGITAL field in the trunk group is set to NO, treatment is
applied to the call.
terminating over a CCS7 IMT
A data call that originates over a PRI facility with a BC information
element of 56 kbit/s or 64 kbit/s (restricted or unrestricted) terminating
over a CCS7 IMT is terminated only over a CCS7 IMT marked
DIGITAL in table TRKGRP. If an appropriate CCS7 IMT cannot be
found, the call is blocked. The call is routed to GNCT treatment.
terminating over non-IMT trunks
No restriction is applied to calls destined to non-IMT trunks.
ISUP RELease with cause
ISDN RELease with cause
ISDN DISConnect with cause
ISDN RELease COMplete with cause
the call is a data call
the terminating agency has received one of the previously listed
messages (and the cause value is not equal to 16 "normal clearing").
Advertisement
Table of Contents
