Lancom 1723 VOIP User Manual page 24

LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
ISDN
A connection to an ISDN NTBA over the TE interface. The NT interface can
additionally be used to connect ISDN terminal devices directly or via a
downstream ISDN PBX.
Analog
A connection to an analog exchange line or to an extension line of an
upstream analog PBX.
SIP lines
Maximum 16 SIP lines There are three different types of SIP line:
A "Single account" line acts like a normal SIP account with a single
telephone number. The internal users can all make use this account
for making SIP calls, although only one call can be conducted at a
time.
Depending on the provider services, these lines can be used to reach
subscribers in the provider networks, subscribers in other SIP net-
works (partner networks), or even land-line subscribers. Your own
availability at your own telephone number or even solely with an SIP
name over the Internet also differs from provider to provider.
A "trunk" line acts like an extended SIP account with a main external
telephone number and multiple extension numbers. Internal users use
this account in parallel and several calls can be made simultaneously
(until the maximum available bandwidth is exhausted).
As a "SIP gateway" line, the LANCOM VoIP Router provides a remote
SIP PBX with a transition to the local ISDN network. The SIP gateway
is registered at the SIP PBX with a single number, although several
calls can be conducted at once (until the maximum available band-
width is exhausted). The connection between the SIP PBX and the
LANCOM VoIP Router is normally established over a VPN connection.
A "link" line acts like a trunk line without limitation to one main exter-
nal telephone number and multiple extension numbers. Internal users
use this account in parallel and several calls can be made simultane-
ously (until the maximum available bandwidth is exhausted).
SIP PBXs
Maximum 4 connections to upstream SIP PBXs. These lines are generally
connections to large PBXs in the network at headquarters which can be
reached via a VPN connection.
Chapter 1: Introduction
23