Cisco 1605-R How To Use Manual page 82

Voice Interface Cards
ISDN BRI Card LEDs
ISDN BRI voice interface cards have three LEDs as listed in Table 3-7.
Table 3-7
LED
B1
B2
OK
If you have additional cards to install, proceed to the appropriate section(s) in this manual.
When you have finished all installations, see the software configuration guide that shipped
with your hardware.
3-34 Cisco WAN Interface Cards Hardware Installation Guide
ISDN BRI Voice Interface Card LEDs
Meaning
Call active on B1 channel
Call active on B2 channel
Interface is connected to an
ISDN network