Front Panel
Modem Module
ISDN Modules
ISDN With POTS Modules
Ethernet
DDS CSU/DSU Module
T1 CSU/DSU Module
E1 Module
Front Panel
There are six status lights on the front of the router. These lights indicate the current overall status of the router.
You can monitor your GTX Series router by checking the status lights on the front of your router and also on the modules on the router's back panel.
Front Panel
Modem Module
ISDN Modules
ISDN With POTS Modules
Ethernet
DDS CSU/DSU Module
T1 CSU/DSU Module
E1 Module
Front Panel
There are six status lights on the front of the router. These lights indicate the current overall status of the router.
Modem Module
Each of the Modem modules (the 33.6 K and the 56 K) has a single status light for the telephone LINE connection.
| Light | State | Indicates... |
| LINE |
On
Blinking Off |
Modem has an active connection to another modem.
NA
Modem does not have an active connection to another modem. |
ISDN Modules
There are three green status lights on the ISDN U and S/T modules. These lights indicate the ISDN BRI status of the two B and one D channels. Both B and D channel lights go off when you restart the router.
ISDN With POTS Modules
In addition to the three status lights common to all ISDN modules (B1, B2, D), the ISDN with POTS modules have two additional status lights, one for each of the telephone connectors (TEL 1 and TEL 2).
Ethernet
The fixed Ethernet connection and the Ethernet module have two status lights. The right one is for link status, and the left one is for traffic status.
DDS CSU/DSU Module
This module has three amber status lights.
T1 CSU/DSU Module
This module has three amber status lights.
E1 Module
This module has three amber status lights.
| Light | Indicates... |
| ALM | Alarm condition indicating the following: |
| TST | Module is in loopback test mode. |
| LOS | Loss of sync indicating that the module is unable to sync to the incoming data stream. |