Green/red, blinkingNo password set. Without a password the
conguration data in the device is
unprotected.
Red, blinkingCharge or time limit reached
1x green inverse
blinking*
Connection to the LMC active, pairing OK,
device not claimed
2x green inverse
blinking*
Pairing error, resp. LMC activation code
not available
3x green inverse
blinking*
LMC not accessible, resp. communication
error
bOnline
OffWAN connection inactive
Green, permanentlyWAN connection active
Red, permanentlyWAN connection error
gVPN
OffVPN connection inactive
Green, permanentlyVPN connection active
Green, blinkingVPN connecting
fVoIP
OffNo SIP accounts dened or VCM is off
Green, permanentlyAll dened and active SIP accounts
(outgoing) were successfully registered
Red, permanentlyNot all of the dened and active SIP
accounts were registered
(possibly still in process)
Red or green
inverse ashing
Number of currently used lines
( connecting or connected)
Serial interface
Conguring the device via
the serial interface requires
a serial conguration cable
(available as an accessory).
ISDN interface
ISDN 1 + 2
Internal (NT) or external
(TE) ISDN bus.
This feature is controlled
by LCOS.
ISDN 3 + 4
Internal (NT) ISDN bus.
A 100-Ohm resistor
for line termination is
switchable in LCOS.
cDSL
OffInterface deactivated
Green, permanentlyDSL connection active
Green, ickeringDSL data transfer
Red, ickeringDSL transfer error
Red/orange, blinkingDSL hardware error
Orange, blinkingDSL training
Orange, permanentlyDSL sync
Green, blinkingDSL connecting
VDSL / ADSL interface
Use the supplied DSL cable
for the IP-based line to
connect the VDSL / ADSL
interface and the provider’s
telephone socket. For
more information, please
contact your Internet service
provider.
USB interface
You can use the USB
interface to connect
a USB printer or a
USB drive.
dISDN
OffInterface deactivated
Green, permanentlyD-channel active
Green, blinkingISDN connected
Red, ickeringISDN transfer error
Red/orange, blinkingISDN hardware error
Red, permanentlyISDN connection not enabled
Orange, blinkingISDN connecting
eETH
OffNo networking device attached
Green, permanentlyConnection to network device operational,
no data trafc
Green, ickeringData transmission
LANCOM 1681V
Power
VDSL
Online
ETH 1
ETH 2
VPN
ETH 3
ETH 4
ISDN Status
hReset
Reset switchOperated e.g. with a paper clip
short press > Restart the device
long press > Reset the device
a
bcd
e
f
*) The additional power LED statuses are displayed in 5-seconds rotation
if the device is congured to be managed by the LANCOM Management
Cloud.
This product contains separate open-source software components which are subject to their own licenses, in particular
the General Public License (GPL). The license information for the device rmware (LCOS) is available on the device‘s
WEBcong interface under “Extras > License information“. If the respective license demands, the source les for the
corresponding software components will be made available on a download server upon request.
Gigabit Ethernet 10/100/1000
ISDN 3ISDN 4
TE / NTNT
ISDN 1ISDN 2
TE / NTNT
VDSL / ADSL
defabc
acebgf
d
h
LANCOM 1784VA
DSL
ETH 2
Power
ETH 1
Online
ISDN 1
ETH 4
ETH 3
VPN
ISDN 2
Reset
ISDN 3
ISDN 4
VoIP
LANCOM 1784VA
Quick Reference Guide
Cloud-ready
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