Aastra Ascotel IntelliGate 2025 - 4.4 Communication Protocols; 4.4.1 Protocol and Topology Type

Ascotel IntelliGate 2025/2045/2065
Part 1 Networking the Systems 85
higher calling rates.
As Fig. 1.20 shows, combinations of both networking types are also possible.
[1] Basic charge
[2] Charges per call and time unit
Fig. 1.22: Cost structure between leased-line and virtual networking
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.
Call time
Leased-line networking
Costs
[min/month]
[2]
[1]
virtual networking
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