Identification elements
100
System functions and features as of R3.0
syd-0367/1.3 – R3.0 – 03.2013
PISN - Internal Call with Overflow Routing
User C (340) on PINX 2 calls user A on PINX 1 via PINX 3 as all the available commu-
nication channels between PINX 2 and PINX 1 are busy. PINX 3 belongs to
Region 60.
Fig. 37
Example 2: User C calls user A, overflow routing (excerpt from
Tab. 26
Example 2: Creating and presenting user C’s CLIP number
Step
CLIP number
NPI
TON
Description
1
340
PNP
level 0
User C
→
PINX 2
• There is no suitable DDI number.
2
50340
PNP
level 1
PINX 2
→
PINX 3
3
50340
PNP
level 1
PINX 3
• There is no suitable DDI number.
4
50340
PNP
level 1
PINX 3
→
PINX 1
5
340
PNP
level 0
PINX 1
• The system’s own regional prefix is deleted
• TON is adapted.
6
340
PINX 1
→
User A
• Presentation on the system phone