Specifications

Chapter 3 Testing & Diagnostics
3-6
FXS Diagnostic Functions
Channel Status LEDs
Bi-color Red/Green Signaling Status LEDs indicate both the near-end and
far-end seizure conditions by 12 visual indications on the back of each
FXS-12 card as follows:
Green Incoming Seizure (Tip Ground, Incoming A bit
set) Green is the normal idle status for Loop-
Start signaling. The Channel Status LED is the
normally off for the idle state in Ground-Start
signaling.
Red Outgoing Seizure (Loop Current Detect or Ring
Ground Detect) Red is the normal outgoing call
setup status during dialing.
Yellow Both Incoming and Outgoing Seizure Yellow is
the normal status for an answered call in
progress. The Channel Status LED returns to
Red or Green when either the far-end or near-
end caller (respectively) hangs up.
All 12 LED's on the card are yellow: LIU is in trunk processing mode. If
trunk processing doesn't clear in 16 seconds, this indicates a problem with
the network T1 signal.
All 12 LED's on the card are RED: Indicates an unsupported signaling
option. Choose another type of signaling or check your switch settings.
Channel 22
Channel 21
Channel 20
Channel 19
Channel 18
Channel 17
Channel 16
Channel 15
Channel 14
Channel 13
Test 20
Test 19
Test 18
Test 17
Test 16
Test 15
Test 14
Test 13
TP Busy/Idle
Option C
Option B
Option A
Test 12
Test 11
Test 10
Test 9
Channel 12
Channel 11
Channel 10
Channel 9
Channel 8
Channel 7
Channel 6
Channel 5
Channel 4
Channel 3
Channel 2
Channel 1
Test 8
Test 7
Test 6
Test 5
Test 4
Test 3
Test 2
Test 1
TP Busy/Idle
Option C
Option B
Option A
Test 24
Test 23
Test 22
Test 21
Channel 24
Channel 23
Channel Status
LEDs
Channel Status
LEDs