Alpha Technologies XP-EDH4 - Technical Manual - Manual (Page 38)

38 745-419-B0-001 Rev. A (11/2013)
3.0 Configuration and Operation
3.1 Checking the LEDs
The EDH4 transponder features 6 green LED indicators:
• STAT • US
• ELINK • DS
• ONLINE • PWR
On initial power up, the LEDs will remain off for several seconds after which time the DS, US, and
ONLINE LEDs will blink, in unison, 6 times. After this sequence completes, the LEDs indicate the status.
The PWR, DS, US, ONLINE, and ELINK LEDs conform to the DOCSIS OSSI specification.
LED Function State Meaning
PWR
Power LED
(Note: this LED is not tied directly
to DC power)
Off
The transponder is not
powered or is not functioning.
On The transponder is on.
DS
Downstream LED: Indicates
status with respect to downstream
scanning and synchronization.
Blinking
The transponder is scanning
for a downstream DOCSIS
channel.
US
Upstream LED: Indicates status
with respect to acquisition of
upstream parameters and initial
ranging.
Blinking
The transponder is obtaining
upstream parameters and is
performing initial ranging.
On
The transponder has
completed a successful initial
ranging sequence.
ONLINE
Online LED: Indicates status with
respect to the completion of the
IP initialization process and when
the unit is operational.
Blinking
The transponder is currently
involved in the IP initialization
process.
On
The transponder has
completed the IP initialization
process and is operational.
ELINK
CPE Link LED: Indicates status
with respect to the bridging of
data to and from a CPE device
connected to the transponder's
Ethernet port.
Off
A CPE device is not
connected to the
transponder's Ethernet port.
Blinking
The transponder is bridging
data to/from a CPE device.
STAT
Status LED: Indicates the
presence or absence of data
transference between the
transponder’s two processors.
Off
Data is not being transferred
between the two processors.
Blinking
Data is being transferred
between the two processors.
Table 3-1, LED Status Summary