Extender 4000 Leds - MCK EXTender PBXgateway II System Administrator Manual

Check the following:
•
Check that the correct module is installed at the location. (Gateway II unit installed at the corporate
facility, and a Remote unit at the Branch office)
•
Check the wiring to the punch-down block.
•
Check for a loose connection on the back of the units.
•
Check for a damaged RJ-21cable.
•
If you are sure everything is correct, you may have a bad telephony port on the EXTender or PBX.
Note: The most common cause of this problem is faulty wiring. You should double-check all wiring.

EXTender 4000 LEDs

Once the EXTender 4000 is properly connected it will begin a series of self-diagnostic tests which are
displayed as a series of LED flashes. The "Status" LED will blink for several seconds as the module is
initializing.
Once the power-up sequence has finished, (see page 142) the state of the LEDs should be:
Table 13: EXTender 4000 LED States
Label Description
Status Blinking while module is initializing..
Off when not powered.
After unit is powered:
On Solid Green when enabled but not extended.
Slow Green Flash when extended and on-hook.
Fast Green Flash when extended and off hook.
Green Flicker when there is no connection to a telephone.
CLN Blinking when an ethernet collision condition exists.
PC Off if nothing plugged in or connection is bad.
On solid when a good connection is established.
Blinks when traffic is sent.
LAN Off if nothing plugged in or connection is bad.
On solid when a good connection is established.
Blinks when traffic is sent.
EXT Normally off, blinks when the EXTender 4000 sends ethernet traffic.
PBXgateway II System Administrator's Guide
Figure 49: EXTender 4000
146