Ascotel IntelliGate 2025/2045/2065
608 Planning a PBX Part 3
4.5.6.2 Digital down-circuit connection of a PBX with QSIG
If a down-circuit Ascotel PBX is connected with an up-circuit PBX via digital lines
(T, T2), all the features as per QSIG are available providing the up-circuit system
supports the QSIG protocol (see "ISDN services supported by the system", page
424).
The down-circuit PBX is configured in accordance with the rules for networked
PBXs.
The up-circuit ISDN PBX has a connection to the public network. It can also be an
Ascotel or a third-party product, provided it supports the QSIG protocol.
As a rule the down-circuit PBX is connected with the up-circuit PBX via its own
fixed lines. Depending on the PBX type the interfaces can be basic accesses (T) or
primary rate accesses (T2). Connections on an S external-type interface are also
possible instead of connections on a T interface, providing at least one T interface
is available for synchronization via the ISDN network.
Fig. 3.9: PISN consisting of PBX 1 with a down-circuit PBX 2
4.5.6.3 Down-circuit connection of a PBX with cordless
system
A PBX with cordless system can be connected down-circuit from another PBX in
a number of ways. As a rule the up-circuit PBX is a larger system.
Public network
PISN
haz0766aaena0
PBX 1
PBX 2
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