ASCOM Ascotel 2025 - Communication Protocols; Protocol and Topology Type

ascom Ascotel 2025/2045/2065
1.36 Networking the Systems HBT_20321104_01/B0_en
4.4 Communication Protocols
The system supports the two main protocols for setting up a PISN:
• The ISDN protocol DSS1 is used mainly in virtual networks.
• The QSIG / PSS1 protocol is based on an international standard that is sup-
ported by all leading PBX providers. QSIG / PSS1 is used to set up private net-
works with very high performance and capacity.
4.4.1 Protocol and Topology Type
The system supports any combination of protocol and topology type. Normally,
however, the QSIG / PSS1 protocol is used for leased-line networking and the
DSS1 protocol for virtual networking.
[1] QSIG / PSS1 protocol in a leased-line network
[2] DSS1 protocol in a virtual network
Fig. 1.23: Normally used protocols
QSIG DSS1DSS1
Public network
haz0657aaena0
PINX 1 PINX 2
(DSS1) DSS1DSS1
haz0658aaena0
PINX 1 PINX 2
Public network
[2][1]