Product manual

Product Manual - DM991 Series V Family - 204.4092.08 76
† With the E1 interface enabled.
◊ With the E1 disabled.
⊥ Only for DM991SE.
Ø In the 4W model this LED is replaced for 109A (line A) and 109B (line B) LEDs. The operation of LEDs
remains the same.
<< Only on model 4W, when configured for 4 wires.
The DM991S/SE modems show also the following keys:
• LAL: Activates LAL test.
• LDL: Activates LDL test, for the G.703 side as well as for the V.35 or V.36/V.11 side.
• LDR: Generate LDR request.
The DM991C/CE modems show the same operations, however they are enabled by software.
17.2. DM991C/CE Modems Front Panel LEDs
Led
Status
Behaviour
ALIM
Equipment on
Turned on
Recived data
Turned on
Receiving all 1 or all 0
Turned off
Transmited data
Turned on
Transmiting all 1 or all 0
Turned off
No carrier
Turned off
AIS reception
Blinks twice a second (most of the time turned off)
No frame synch
Blinks once a second (most of the time turned off)
Remote Alarm Indication
Blinks once a second (most of the time on)
No CAS synch *
Blinks once a second (most of the time on)
No CRC4 synch *
Blinks twice a second (most of the time on)
Frame, CAS and CRC4
synch
Turned on
Link Ethernet
Turned on
Activity on the Interface
Blinks
No carrier
Turned off
Handshake
Blinks once a second (most of the time turned off)
Training
On time equal to off time, blinking once every second
(1Hz)
TDM not aligned *
On time equal to off time, blinking once every second
(1Hz)
LOSWD or LOSWF
On time equal to off time, blinking four times every
second (4Hz)
CRC error or no CAS synch Blinks once a second (most of the time on)
In synch
Turned on
No test active
Turned off
Any test active
Turned on
BERT error detected in the
G.shdsl interface
On time equal to off time, blinking four times every
second (4Hz)
TEST
DSL
(Ø)
ETH
⊥
104
₪
103
₪
E1
Table 23. LEDs meaning - DM991C/CE
* When enabled, otherwise ignored.