LANCOM 1722 VoIP – LANCOM 1724 VoIP
Chapter 2: Installation
50
EN
Life-line support is to be deactivated when both ISDN interfaces are
to be operated in the same mode, i.e. as two TE or two NT interfaces.
The interfaces are not to be bridged in case of power failure when
being operated in this manner!
The
ISDN power relay
means that the bus voltage of an external ISDN
bus at ISDN 1 is switched through to the terminal equipment connected
to ISDN 2 (LANCOM 1722 VoIP) and/or ISDN 3 (LANCOM 1724 VoIP). As
a consequence, ISDN equipment operated at the internal ISDN bus of the
LANCOM VoIP Router can be operated without its own power supply.
Be sure to deactivate the ISDN power relay if both ISDN interfaces are
to be operated in TE mode, such as when both ISDN interfaces are
connected to an ISDN NTBA, for example. A power relay in this situ-
ation would result in a short-circuit which would damage the device
and the ISDN NTBAs!
Before altering the DIP switch settings, remove all cables from their sock-
ets.
Remove the see-through cover of the DIP switch.
We suggest that you use a screwdriver to set the DIP switch to the desired
position.
Plug the cable in again and start the device.
A change to the software configuration is also necessary if the ISDN interfaces
are to be set to a different mode.
LANCOM 1722 VoIP
LANCOM 1724 VoIP
DIP
Meaning
Default
Meaning
Default
1 + 2
ISDN 2 Rx/Tx
(100
Ω
bus termination)
up (on)
ISDN 4 Rx/Tx
(100
Ω
bus termination)
up (on)
3 + 4
Life-line support
up (on)
ISDN 3 Rx/Tx
(100
Ω
bus termination)
up (on)
5 + 6
up (on)
ISDN power relay ISDN 1
> ISDN 3
down (off)
7 + 8
ISDN power relay ISDN 1
> ISDN 2
up (on)
ISDN 2 Rx/Tx
(100
Ω
bus termination)
down (off)
9 + 10
ISDN 1 Rx/Tx
(100
Ω
bus termination)
down (off)
ISDN 1 Rx/Tx
(100
Ω
bus termination)
down (off)
Содержание 1722 VOIP
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