Operation
When the Compact mDSL Modem has been properly configured
and installed, it should operate transparently. This sections describes
power-up, LED status monitors, and the built-in loopback test modes.
Power-Up
Before applying power to the Compact mDSL Modem, please read
the
Power Connection
section and ensure that the unit is connected
to the appropriate power source.
LED Status Monitors
The Compact mDSL Modem features six front panel LEDs that
monitor connections on the DSL and 10BaseT links, signaling, error
and test modes. Figure 9 (below) shows the front panel location of
each LED. Descriptions of each LED follow Figure 9.
DSL Link
(Active Green) Solid green (On) indicates that the
end to end DSL Framer Link is up, signifying that
the link across the DSL span is active. The DSL
Link LED is Off when the link is down.
Status
Blinks yellow from one to eleven times to indicate
system status. Each pulse pattern is separated by
a 2 second “off” period. Greater pulse patterns
have
higher priority (buffer saturation has greater
priority than an empty MAC table). Valid system
statuses are:
1 pulse
=
system status is okay
2 pulses
=
no MAC entries in the MAC
Address Table
3 pulses
=
Clear to Send (CTS) or Carrier
Detect (DCD) from base unit are not
asserted
4 pulses
=
IM1/I buffer is saturated
5 pulses
=
WAN receive frame(s) too large
6 pulses
=
WAN receive frame(s) not octet
aligned
7 pulses =
WAN receive frame(s) aborted
8 pulses =
Detected WAN receive frame(s) with
15
Compact mDSL Modem
16
Compact mDSL Modem
CRC
9 pulses =
Detected LAN receive frame(s) too
large
10 pulses =
Detected LAN receive frame(s) not
octet aligned
11 pulses =
Detected LAN receive frame(s) with
bad CRC
10BT Link
(Active Green) Solid green indicates that the
10BaseT Ethernet interface has detected a valid
SQE heartbeat, signifying a valid 10BaseT con-
nection.
NS
(Active Red) Solid red indicates that the Digital
Signal Processors (DSPs) are not linked.
ER
(Active Red) Flashing red indicates CRC Errors on
DSL (Framer) side if DSL Link is active or if bit
errors are received during loop/BER test.
- ER flashes once to indicate a CRC error (during
normal operation) or bit errors (during Remote
Loopback 511/511E tests).
TM
(Active Yellow) Solid Yellow indicates an Active
Test Mode. The unit may be placed in test mode
by the local user or by the remote user.
LED Descriptions Table
Link Brk = DSL Link Broken
Brk+10s = 10 Seconds following Link Break
G=GREEN
O=ORANGE
ON= ON
off= OFF
F=Flashing
G*=Green if a valid 10Base-T connection is detected.
Figure 9.
Compact mDSL Modem Front Panel
Link
DSL
10BT
ER
NS
Status
TM
-511E/RDL
-Normal
-511/RDL
Compact mDSL Modem - 10BaseT
LOCAL
REMOTE
10BaseT DSL Status NS ER TM 10Base-T DSL Status NS ER TM
Power ON G* off F ON
off off G* off F ON off off
DSL Link G* G F off off off G* off F off off off
Link Brk G* off F off off off G* off F off off off
Brk+ 10s G* off F ON off off G* off F ON off off
RDL G* G F off off ON G* off F off off ON
RDL+511 G* off F off off ON G* off F off off ON
With DTE Connected With DTE Connected
Mark G* G F off off off G* G F off off off
Space G* G F off off off G* G F off off off
Data G* G F off off off G* G F off off off
