
Extend POTS Telephone Service Over Multimode Fiber
The PK8M POTS-to-fiber converter installation kit provides a practical solution for extending analog telephone communications over multimode fiber. It allows POTS telephone service to be transported between locations without relying on long copper telephone runs.
The PK8M is specified for multimode duplex fiber transmission up to 2 km, using the appropriate length of fiber optic cable.
FXO and FXS POTS Connectivity
The PK8M uses an FXO/FXS configuration for connecting POTS telephone equipment across the fiber link.
- FXO: Exchange/PBX side
- FXS: Subscriber/telephone side
- Function: POTS
- Fiber: Multimode
- Fiber configuration: Duplex
The selector guide specifies one FXO and one FXS interface for the PK8M.
Multimode Fiber Transmission
Multimode fiber provides a practical solution for shorter-distance POTS communications. The PK8M is specified for up to 2 km over multimode duplex fiber when the appropriate fiber optic cable is used.
All VERSITRON units in this POTS converter family use LC optical connectors.
Standalone POTS Fiber Installation
The PK8M is designed for standalone installation, making it suitable for applications where a rack-mounted chassis is not required.
For centralized rack installations, the corresponding PK8M-RM provides the same POTS, multimode duplex, and 2 km configuration in a rack-mount format.
POTS to Fiber Applications
The PK8M can be used for:
- PBX-to-remote telephone connections
- Building-to-building telephone links
- POTS extensions over fiber
- Remote subscriber connections
- Commercial and industrial facilities
- Campus communications
- Fiber-based telephone infrastructure
Technical Specifications
| Specification | PK8M |
|---|---|
| Function | POTS |
| FXO | 1 |
| FXS | 1 |
| Fiber Type | Multimode |
| Fiber Configuration | Duplex |
| Maximum Distance | 2 km |
| Installation | Standalone |
| Optical Connector | LC |
These specifications are based on the VERSITRON 8-Channel POTS 2-Wire FXO/FXS to Fiber Converter Installation Kits Selector Guide.
Why Choose the VERSITRON PK8M?
The PK8M combines POTS telephone connectivity, FXO/FXS interfaces, multimode fiber transmission, and standalone installation in a complete fiber optic telephone solution. Its 2 km multimode transmission capability makes it suitable for extending analog telephone service over shorter-distance fiber links.
VERSITRON — Safeguarding Communications Since 1958
VERSITRON has been providing fiber optic communication solutions since 1958. Our product portfolio includes fiber optic solutions for voice, video, data, and network communications.
For assistance selecting the appropriate POTS-to-fiber converter, fiber type, or installation configuration, contact VERSITRON for technical support and application guidance.
Power Requirements
12VDC, 2.0Amp
Connector (Tip & Ring)
RJ-11, 2-Wire Twisted Pair
Fiber Interface Connector
LC
Installation
Standalone
Fiber Cable
Multimode: 62.5/125 (Duplex)
Link Margin
Multimode: 11dBm
Audio Signal
Analog, 300Hz to 3.4KHz
Idle Channel Noise
-65dBm
Single Frequency Distortion
-46dBm
2nd Harmonic Distortion
-55dBm
Talk Battery
44 to 52VDC
Loop Current
40mA max. (off hook)
Ring Signal
92V peak (max), 15 to 67Hz
Line Impedance
600Ω
Operating Temperature
0° to 50°C (32° to 122°F)
Storage Temperature
-40° to 70°C (-40° to 158°F)
Humidity
Up to 95% relative humidity (non-condensing)
Altitude
Up to 10,000 ft
Each Kit Includes:
- FXO Unit
- FXS Unit
- External Power Supplies (90-240VAC)
- 100 Meters (328 ft) of Multimode Cable - Duplex
As a complete package, you get everything you need in a plug & play solution for your phone-to-fiber requirements and you receive a Lifetime Warranty from a trusted manufacturer since 1958! Contact us for assistance by calling (1-800-537-2296) or opening a chat. We are here to help!
PK8M Series Models:
| Model | FXO (Exchange) |
FXS (Subscriber) |
Function | Fiber | Installation | Distance Capability* | RFQ |
|---|---|---|---|---|---|---|---|
| PK8M | 1 | 1 | POTS | MM Duplex |
Standalone | 2 km | |
| PK8M-RM | 1 | 1 | POTS | MM Duplex |
Rack-Mount | 2 km | |
| PKR8M | - | 2 | Ring Down | MM Duplex |
Standalone | 2 km | |
| PKR8M-RM | - | 2 | Ring Down | MM Duplex |
Rack-Mount | 2 km |
Additional Installation Kits Are Available For:
- RJ11
- 600 Ohms Impedance
- LED Indicators
- SFP Module Technology
- 300Hz to 3.4KHz
-
Rackmount Options Manuals for 2-Wire Products
(See Bottom of Page)
Why Choose Us
Technical Support
Life Time Warranty
NDAA / TAA Compliant
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