ASCOM Ascotel 2025 System Manual page 70

Point-to-Multipoint Connection with PBX
If a PBX is connected using point-to-multipoint, a direct dial number must be cre-
ated for each MSN number, with all the digits of the MSN number.
MSN 1: 653 12 33
MSN 2: 653 12 34
MSN 3: 653 13 45
NT1: Network Terminal
MSN: Multiple Subscriber Number
U/T: ISDN reference point
AD2: Digital user-network interface AD2
a/b: Analogue user-network interface a/b
Fig. 1.6: Basic access in point-to-multipoint configuration, with single-digit direct dial
and parallel terminal
Combinations are also possible in the case of several lines, e.g. one line in point-
to-multipoint configuration and the remaining in point-to-point configuration.
Note:
If terminals (e.g. MSN1) are connected in parallel on the T interface, Col-
lision Detection has to be activated as the PBX and the terminal influence
each another. This also applies in cases where a/b connections are used
on NT1.
HBT_20321104_01/B0_en
ascom
NT1
U T
haz0322aaxxb0
Ascotel 2025/2045/2065
MSN 1
MSN 2 -> 34
AD2 34
MSN 3 -> 45
a/b
Fax
PBX
45
System Interfaces 1.15