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Front Displays 

 

Figure 2 FOM‐3841/3842 Front Display 

These LEDs indicates status as per the following table 

 

 

 

POTS Exchange

Power

Optics

SW Option

Off Hook

Off Hook

Off Hook

Off Hook

Ringing

Ringing

Ringing

Ringing

CH 1

CH 2

CH 3

CH 4

FOM-3842

POTS Subscriber

Power

Optics

SW Option

Off Hook

Off Hook

Off Hook

Off Hook

Ringing

Ringing

Ringing

Ringing

Ring Down

CH 1

CH 2

CH 3

CH 4

Display LED Indicators 

Label 

Status 

Description 

Power 

Steady Green 

The power supplies on the card are operating properly. 

Steady Red 

The power supplies on the card are not regulating the correct voltages or there is an 
open fuse on the card. Unplug the power from the card for 30 seconds and then plug 
it in again so that the fuse on the card has time to reset. If the Power led is still red or 
not a constant green, replace the card. 

Off 

Card failure or main power failure. 

Optics 

Steady Green 

Optics in sync at each end of link 

Flashing Green 

Local optical RX is receiving errors 

Steady Yellow 

Remote optical RX loss of signal or sync 

Flashing Yellow 

Local optical RX signal present, but no sync 

Flashing Orange 

Card type mismatch at remote end; the two cards are not compatible 

Steady Red 

No optical RX signal 

Off 

Card failure 

SW Option 

Steady Green 

No Function 

Off Hook 

Yellow 

Line is off hook 

Off 

Line is on hook 

Ringing 

Yellow 

Line is ringing 

Off 

Line is idle 

Ring Down 

Yellow 

Fom‐3842 is paired with another FOM‐3842 for 4‐channel ringdown 

Off 

Normal POTS operation 

Summary of Contents for FOM-3841

Page 1: ...USER MANUAL 4 Channel POTS Telephone Fiber Converter FOM 3841 3842...

Page 2: ...cable Repair must only be performed by trained personnel in accordance with the applicable regulations Installation Site Install the unit in a place where the following conditions are met The temperat...

Page 3: ...sal of Used Equipment Used equipment contains valuable raw materials as well as substances that must be disposed of professionally Please dispose of used equipment via an authorized specialist dealer...

Page 4: ...nal telephone line cord wiring Multimode optics on the units can extend the distance to 2km while singlemode optics can further extend the distance to 20km A typical link consists of an FOM 3841 conne...

Page 5: ...Typical Application...

Page 6: ...Features Rear Indicators Connections Figure 1 FOM 3841 3842 Rear 1 1 1 2 2 3 3 4 6 5 6...

Page 7: ...escription 1 2 3 Ring 4 Tip 5 6 Optical Fiber Connections This position may be a pair of ST connectors LC connectors or an SFP slot if so ordered Optics Status LED Status Description Steady Green Opti...

Page 8: ...he power from the card for 30 seconds and then plug it in again so that the fuse on the card has time to reset If the Power led is still red or not a constant green replace the card Off Card failure o...

Page 9: ...M series cards may be installed into a RMC 5000 rack chassis A loaded RMC 5000 is shown below Figure 3 FOM Card being installed into an RMC 5000 Standalone using SAC 1 AC Single FOM series cards may b...

Page 10: ...dule that you use to disengage the module from a port Handling Warnings SFP Modules are static sensitive To prevent damage from electrostatic discharge ESD it is recommended to attach an ESD preventat...

Page 11: ...p Open the bail clasp on the SFP Module with your finger in a downward direction Actuator Button Gently press the actuator up or in while pulling the body of the SFP Module to release the SFP Module f...

Page 12: ...DIP Switch Settings Switch Designations As shown below each DIP switch is assigned a numerical designation which is keyed to the descriptive text Figure 5 FOM 3841 3842 DIP Switches...

Page 13: ...annel 4 Ring Mode DOWN OFF Normal Ringing UP ON Unbalanced Ring S3 1 Reserved S3 2 S3 3 S3 4 S3 5 Remote Configuration DOWN OFF Allow remote configuration UP ON Inhibit remote configuration S3 6 Reser...

Page 14: ...Specifications Figure 6 FOM 3841 3842 Dimensions 80 20 4 11 50X 50 12 7 5 22X...

Page 15: ...iant SFP Modules ELECTRICAL SPECIFICATIONS Min Typ Max Unit Power Requirement Voltage Range 20 24 34 V Supply Current 250 mA Min Typ Max Unit Environmental Storage Temperature 40 85 C Operating Temper...

Page 16: ...18040 412 Guilford Rd Annapolis Junction MD 20701 fiberplex com clients fiberplex com 301 604 0100 UMFOM384x 170822...

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