Dialling Into The Cn; Signalling Method - Siemens Hicom 100 E Service Manual

Least Cost Routing (LCR)
Dial-in procedure (previously T-Net) as of V2.1
030-57-
LCR
..324
Table with negative entries
(are not routed, e.g
.
030-56473 in local network)
otherwise routing to
dial-in server
030-56473
Figure 8-1 Routing with different network providers (example)
A check can be run again in the network to see if routing a call via the CN is less expensive or
if it would make more sense to do so via the normal network (Telecom). If routing via the CN is
neither feasible nor practical, the call is rejected citing cause 21 (call rejected). In this instance,
the Hicom system must route the call via the normal network (Telecom) .
8.3.3

Dialling into the CN

Max. 20 octets=20 byte=160 bit can be transferred in a SUBaddress for each call setup. Out-
going SUBaddressing is always possible.
8.3.3.1

Signalling method

If, on the basis of the exception table, it was decided to send the call via the CN, the number
dialled by the internal user is first completed by Hicom 100 E.
To this end, a timer (4s) is started after each digit. If another digit is dialled within this period,
the digit is appended and the timer restarted. If no suffix dialling takes place within this time,
the DICS S interface is selected and the number dialled thus far sent to the DICS as a SUB-
2M
address.
If further digits are subsequently dialled by Hicom users, these are sent to the DICS in "info"
elements. A maximum of 8 suffix dialling digits can be dialled (restriction at S12 exchange).
8-6
DSS1 setup
Calling party: 030-57324
Called party: 030-904711
Subaddress: 089-72238321
DSS1 setup
Calling party: 030-57324
Called party: 030-56473
Telecom
Authorization check
using CLIP no.
Routing to dest. from
SUBaddress
030-904711
Hamburg
Network
operator
(CN)
Munich
089-72238321
A31003-K16-X001-3-7620
Hicom 100 E Version 2.1, Service manual
Dial-In
Control
Server DICS
,
07/99