Nx Networks 3000 - Manual (Page 54)

Monitoring Your 3000 Series Secure Gateway Router
40 3000 Series User Guide
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 gateway router.
Light State Indicates . . .
D On
Blinking
Off
ISDN S/T module is linked to the
telephone company.
Traffic is on the D channel.
ISDN S/T module is not linked to the
telephone company. This is an error in
North America but okay in Europe.
B1 On
Blinking
Off Call established on the B1 channel.
Traffic is on the B1 channel.
B1 channel is not in use or is idle.
B2 On
Blinking
Off Call established on the B2 channel.
Traffic is on the B2 channel.
B2 channel is not in use or is idle.
D
0 1
ISDN S/T
B1
B2