Networking With Third-Party Systems; Compatible Qsig Protocol; Outgoing Calls Via A Third-Party System - ASCOM Ascotel 2025 System Manual

6.5

Networking with Third-Party Systems

In principle all network-compatible third-party systems that support the QSIG
standard can be networked with the system. However, some restrictions in the
features available are possible. A number of points need to be taken into account
for a third-party system to communicate correctly with the system.
6.5.1

Compatible QSIG Protocol

In practice two different QSIG protocols are used, QSIG and QSIG / PSS1 ISO. The
two variants differ only with regard to the communication technology, not the
scope of performance. The system supports both versions. They can be selected
under the "Protocol" trunk group setting. Make sure you always use the same
version between two systems.
6.5.2

Outgoing Calls via a Third-Party System

There are instances where third-party systems do not recognize a call to be for-
warded to the public network based on its numbering plan identifier. For this rea-
son an exchange access prefix for the third-party system should be sent with the
call (see variant 2 on Page 3.114).
HBT_20321104_03/B0_en
ascom Ascotel 2025/2045/2065
Planning a Private Network 3.131