LANCOM 1722 VoIP – LANCOM 1724 VoIP
Chapter 1: Introduction
20
EN
Internal VoIP terminal devices connected to LAN, WLAN and DMZ, such
as SIP telephones and SIP softphones
The internal ISDN infrastructure with ISDN PBX and ISDN telephones
Analog terminal devices, internally connected either into the ISDN net-
work via a PBX with a/b ports, or alternatively into the VoIP network over
an ATA (Analog Telephone Adapter).
External SIP providers and all of the external subscribers attainable via
them
Upstream SIP PBXs with all of the internal and external subscribers attain-
able through it
The external ISDN world via ISDN NTBA or upstream ISDN PBX, and all of
the external subscribers available via the land-line network
Users and lines
Telephony subscribers in internal areas can take part in voice communications
and, in the LANCOM VoIP environment, are referred to as "users". The
LANCOM differentiates between:
ISDN users
SI
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er
SIP p
rov
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S
IP
P
B
X
ISD
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ers
