LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 2: Installation
39
EN
ISDN
Status display for the ISDN interfaces:
If the LED of an ISDN interface automatically goes off in TE mode, this
does not indicate an error at the S
0
bus. It is in fact because several
ISDN connections and PBXs switch the S
0
bus into power-saving
mode after a certain period of inactivity. When needed, the S
0
bus
automatically reactivates and the ISDN status LED illuminates in
green.
Analog
(1 and 2)
Connection status at the analog terminal equipment connector:
TE mode
(external ISDN connec-
tion)
NT mode
(internal ISDN connec-
tion)
Off
Interface off or Layer 1 deac-
tivated or no Layer 2 TEI
Interface switched off.
When switched off, the line
may, under certain circum-
stances, still be connected to
another ISDN interface via a
life-line relay.
Green
Blinking
Establishing D-channel Layer 1/establishing Layer 2 TEI
Green
On (perma-
nently)
D-channel activated (Layer 1
active and Layer 2 TEI availa-
ble)
D channel activated
Orange
Blinking
Establishing the first ISDN connection
Orange
Flashing
Establishing an additional ISDN connection
Orange
Inverse flicker-
ing
Data traffic being sent
Red
Blinking
B-channel error
Red
On (perma-
nently)
Abort due to error in estab-
lishing D-channel Layer 1 or
Layer 2
Abort due to error in estab-
lishing D-channel Layer 1.
Red/
orange
Blinking
ISDN hardware error
Off
Interface switched off.
Green
On (permanently)
Analog connection is switched on. Handset on-hook or
the device is not connected.
Orange
Blinking
Call being established from LANCOM towards the terminal
equipment (ringing)
