Question:  I have some Evertz 7707IT multi-channel intercom fiber transceivers, can they be used to transport unbalanced PL audio?
Answer:  Yes, the Evertz 7707IT product series can support party-line audio communications across fiber.  See product specifications from the Evertz web page below:

• Extends up to 3 or 8 independent channels of intercom communication over a single fiber optic link

• Configurable interface to:

•  

  • RTS-Telex Matrix: 4-Wire Audio, RS-485 Data, GPIO

  • ClearCom Matrix: 4-Wire Audio, RS-422 Data, GPIO

  • RTS-Telex Party-Line: 2-Wire Audio, GPIO

  • ClearCom Party-line: 2-Wire Audio, GPIO

• NOTE: Does not perform conversion between 2-Wire and 4-Wire systems

• Independent channels can simultaneously accommodate different intercom types

• User-friendly selection of intercom interfaces via programmed profiles

• All configurations and adjustments are controllable through the card-edge user interface or remotely via SNMP and VistaLINK®

• Unique self-calibration of party-line audio null levels

• Selectable termination, and failsafe bias settings for RS-422/485data inputs

• Provides 2 general-purpose inputs (GPI's), and 2 general purpose outputs (GPO's)

URL to Evertz 7707IT web page:  http://www.evertz.com/products/7707IT