Features of 1 Channel Phone with RS-485 Data:

• Extend one 2-wire analog telephone line and/or data
• Analog audio signal 300Hz to 3.4Kz
• RS-485/RS-422 Full-Duplex Data up to 64Kbps
• LED indicators for Instant System Monitoring
• Multiple housing options available
• Standalone or Rack-Mount
• Transparent extension of phone lines
• SFP Based optics

Functional Characteristics:

The FXO modem is used for exchange (PBX or direct dial service from a telephone company) connected telephone lines. These units are designed to be used in conjunction with the FXS modem, which supply a subscriber (telephone handset) interface. When configured in this way, the modems provide a fiber optic link for regular, 2-wire analog telephones. Both FXO and FXS devices use SFP optic modules to achieve transmit distances of up to 20km over a single pair of fiber-optic cable.

Audio Transmission Characteristics:

The FXO accepts a telephone audio signal on its RJ11 connector from the exchange, and digitizes it with an analog-to-digital converter. Each of the digital samples is then encoded and applied to the SFP for transmission over the fiber optic cable. The remote FXS unit decodes the signal from the SFP module and applies it to digital-to-analog converter to recover the analog audio. The converse occurs in the other direction for the FXO. The telephone modem transmits analog signals of 300 to 3400Hz.

RS-485 / RS-422 Transmission Characteristics:

The FXO and FXS tele-data modems accept balanced RS-485/RS-422 data on the RJ45 connector for transmission across the fiber optic line. Data speeds of up to 64kbps are achievable. This interface is full duplex only.

Physical Characteristics:

The telephone modems themselves measure 7.0” wide x 0.84” high x 11.6” deep and are designed to be mounted in a variety of VERSITRON enclosures and chassis. The “Desktop” option is a single-card enclosure (model HF-1). Rack-mount options include a 2-Slot 19” standard rack-mountable chassis (model HF-2SS). For either of these installation options, each modem requires a wall transformer (model PSAC08) included with each kit. The one-pin power connector for electrical input is on the back of FXO and FXS cards. There is an RJ11 jack for the telephone line on the front of the cards. There is an SFP module slot on the back of the cards for the SFP fiber optic interface.

Dimensions of Enclosures & Chassis:

For more information regarding our 1-channel phone kits, please contact us directly. We stand ready to help you with your project!