User guide

detect
Off-hook
Off-hook
On-hook
On-hook
E
M
GND
T
R
T1
4-Wire
Audio
4-Wire
Audio
Trunk Circuit
Signalling Unit
4 Wire E&M Card - Master
R1
E
7
6
8
2
3
5
4
M
T
(-48V)
Fiber Optic
Cable
E&M
E&M
R
T1
R1
ptc
detect
-48V
-48V
detect
Off-hook
Off-hook
On-hook
On-hook
E
M
GND
T
R
T1
4-Wire
Audio
4-Wire
Audio
Trunk Circuit
Signalling Unit
4 Wire E&M Card - Slave
4 Wire E&M Card
Analog E&M
4-Wire Audio Operation
PBX Tie-Line
Cisco Equipment
PBX
Tie-Line
Cisco Equipment
R1
E
7
6
8
2
3
5
4
M
T
R
T1
R1
ptc
detect
-48V
-48V
iMux
Slave
(-48V)
4 Wire E&M Card
iMux
Master
E&M Application Diagram
18! RLH Industries, Inc. • 866-DO-FIBER • www.fiberopticlink.com! Introduction