System interfaces
32
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
2. 1. 2. 2 Digital down-circuit connection with QSIG
If a down-circuit communication server is connected with an up-circuit communication
server via digital lines (BRI-T, PRI), all the features as per QSIG are available providing
the up-circuit communication server supports the QSIG protocol.
The down-circuit communication server is configured in accordance with the rules for
networked systems.
The up-circuit communication server has a connection to the public network. It can also
be an MiVoice Office 400 system or a third-party product, provided it supports the
QSIG protocol.
As a rule the down-circuit communication server is connected with the up-circuit com-
munication server via its own fixed lines. The interfaces can be basic rate interfaces
(BRI-T) or primary rate interfaces (PRI). Connections on BRI-S
external interface are
also possible instead of connections on a BRI-T interface, provided at least one BRI-T
interface is available for synchronization via the ISDN network.
Example: Down-circuit connection with cordless system
Fig. 9 Digital down-circuit connection with QSIG
BRI-S
ext.
Cells
Communica-
tion server
Up-circuit
system
PRI
BRI-T
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