T-Comfort Comfort Pro S, Руководство по монтажу и пусконаладке

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14
Features
The eight gateway channels of an installable Media Gateway card are automatically switched on for
telephone calls between IP terminals and ordinary terminals, for data compression, for the generation of
DTMF and dial tones and for echo suppression. It is also possible to use a limited range of VoIP functions
without an additional Media Gateway card. The system software provides up to 32 uncompressed VoIP
gateway channels without echo compensation.
For users wanting to use PC-supported telephony, IP system terminals are available as separate licensable
software versions (“Softphone”). You will find further information on this in the chapter on Voice over IP
(VoIP) starting on page 92.
SIP
Comfort Pro S also provides external SIP connections as “SIP trunk lines. Setting up and using external SIP
connections is completely transparent for telephone users, providing them with easy access to low-cost
Internet telephony and a fallback to normal ISDN connections in case of error or busy lines. A Media Gateway
card is required for SIP telephony.
Q.SIG-IP
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. With up to 5 virtual lines, the number of calls which can be made simultaneously
between two communications systems is limited only by the band width of the Internet connection. Q.SIG IP
can also be operated with a restricted range of functions without a Media Gateway card.
Packet Data in the D Channel
Some business applications, for instance POS terminals, cash registers or credit card terminals, require a
permanent data connection 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
Comfort Pro S. 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 internal S
0
interfaces. A TEI mapping table allows these X.31
connections 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.