Lancom 1722 VOIP, Руководство пользователя

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LANCOM 1722 VoIP – LANCOM 1724 VoIP
Chapter 2: Installation
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EN
The factory settings have the ISDN interfaces marked with
⌧
set to TE mode
and the ISDN interfaces marked with set to NT mode. These ISDN settings
can be altered according to your requirements:
Multiple TE interfaces provide, for example, up to eight B channels as a
backup or for dial-in.
With multiple NT interfaces, for example, a downstream ISDN PBX can be
provided with up to eight B channels.
Depending on the combination of ISDN interfaces in TE and NT mode, the
hardware must be set up with the functions for bus termination, life-line sup-
port and power relay, and the software must be set up with the appropriate
protocol. The setting for the protocol allows for the type of ISDN connection
to be used (point-to-multipoint or point-to-point).
2.5.1 Bus termination, life- line support and power relay
The hardware function modes of the ISDN interfaces are set by DIP switches
on the underside of the device.
Bus termination is obligatory with an ISDN interface in NT mode.
Bus termination is generally deactivated for ISDN interfaces in TE mode.
If the LANCOM VoIP Router is the last device at a longer ISDN bus and this
itself is not terminated, it may be advantageous to activate the bus termi-
nation for an ISDN interface in TE mode.

The supplied adapter must be used if a connection is to be made to
an ISDN interface which is set differently to its default settings. This
adapter serves to cross-over the contacts in the ISDN interface. Not
using the adapter can cause damage to both the LANCOM VoIP
Router and to the devices connected with it!
LANCOM 1722
VoIP only If life- line support is activated, the interfaces ISDN 1 and ISDN 2 are
bridged if the device is unavailable due to a power outage or if the ISDN
2 interface is switched off (default: on). The life-line support is used when
the LANCOM 1722 VoIP is connected to an external ISDN line over a TE
interface with the simultaneous operation of ISDN terminal devices at the
internal ISDN connection of an NT interface. If bridged, the ISDN devices
can then use the external ISDN bus directly.
To activate life-line support, all four DIP switches (3 to 6) must be up; to
deactivate, all four DIP switches must be down.