BELGACOM Forum 523, Руководство по монтажу и пусконаладке, Страница: 17 / 244

15
Features
z
Q.SIG-IP and SIP tie line : Several communications systems
can be networked via IP connections using “Q.SIG IP”. Low-
cost data connections can be used to network the
communications systems of branch offices instead of ordinary
permanent ISDN lines.
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DECT over IP
®
: DECT networking via VoIP is another possible
option for offices already extensively using VoIP telephony.
The Radio Fixed Parts (RFPs) are connected via network data
connections, so they do not occupy any U
pn
ports and can use
existing network connections. With DECT over IP, VoIP
protocol data is changed into DECT-compatible voice data
direct on the RFPs. DECT-RFPs and DECT over IP-RFP can be
used together in combination in many cases; it is however not
possible to switch between RFPs using different technologies
during a call.
Packet Data in the D Channel
Some business applications, for instance POS terminals, cash reg-
isters or credit card terminals, require a permanent data connec-
tion over the X.25 packet data network. Packet data transfer
through the ISDN D channel (according to X.31 via SAPI 16) can
also be established between several S
0
interfaces of the
Forum 523/524. Simultaneous connections are distinguished by
means of a TEI (Terminal Endpoint Identifier).
X.31 packet data can be forwarded between two S
0
interfaces (for
instance an internal and external S
0
interface). Equally, data can
be forwarded (“routed”) over permanent Q.SIG lines. It is possible
to operate multiple terminals with the same TEI on different inter-
nal S
0
interfaces. A TEI mapping table allows these X.31 connec-
tions to be routed to the same external S
0
interface.
The routing table for X.31 packet data is set in the Configurator
under
Telephony : Extended : X.31 . Additional information can
be found in the Configurator online help files.