Lancom 1722 VOIP, User Manual

Page: 44 / 136

LANCOM 1722 VoIP – LANCOM 1724 VoIP
Chapter 2: Installation
44
EN
ISDN
Connection status of first and second ISDN interface:

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 green.
red flickering Error (CRC error, Framing error etc.)
red constantly on Synchronisation not succsesful, searching peer
orange constantly on Synchronisation succsesful
orange blinking/flash-
ing Handshake/training phase
red/
orange blinking Hardware error
TE Mode
(external ISDN
connection) NT Mode
(internal ISDN
connection)
off Interface switched off or
Layer 1 deactivated 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 (
→
Seite 49).
green blinking Establishing D channel Layer 1 or Layer 2 TEI
green constantly on D channel activated (Layer 1
aktive and Layer 2 TEI avail-
able) D channel activated
orange blinkend Establishing first ISDN connection
orange blitzend Establishing of further ISDN connections
orange invers flickering Data traffic (send)
red blinking Error on B channel
red constantly on Establishing D channel Layer
1 or Layer 2stopped due to
error Establishing D channel Layer
1 stopped due to error
red/
orange blinking ISDN hardware errot