94
SMG Digital Gateway
Third digit reception — 1
, match with 6th rule is lost and match with 5th rule appears. This match final,
given that there are no rules in the mask for the further dialing to match with. The call will be immediately
routed using 5th rule.
3.1.6.5
Configuration example for prefix with modifier type
Objective
The following range of numbers is allocated to SMG: 26000 – 26199, but not all the numbers may be
assigned to subscribers immediately. When an unassigned call arrives to a number in this range, SMG will reject
it with the disconnection reason
'
3 – No route to destination
'
. But, given that this numbering is local to the
gateway, it should have sent the reason '
1 – Unallocated (unassigned) number
' in the disconnection message.
Solution
For correct hanging up reason transmission, you should create a local numbering — configure a 'Modifier'
type prefix.
To do this, add a new prefix in the 'dial plan' section with
'Modifier'
value of the
'Prefix type'
parameter. In
the prefix settings, add a list of prefix masks with
'Called'
type. For the number range 26000-26199 specified in
the objective, the mask will be as follows:
(26[0-1]xx).
3.1.7
Call routing
3.1.7.1
Trunk groups
Trunk group is a set of connectivity lines (trunks) that may be represented by E1 stream channels, data
transfer environment bandwidth (IP channels). Q.931, SS7 signalling works via Е1 stream channels, SIP/SIP-T/SIP-
I/H.323 interface — via IP channels. To
edit the trunk group,
double-click the corresponding row in the group
table with the left mouse button or select the group and click the
button below the list.
