Intellisystem IT-7304-PC, User Manual, Page: 3 / 12

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1. Introduction
IT-7304-PC is a high-performance V.35 optic fiber modem developed by using a dedicated
integrated circuit. It is to modulate an N×64K V.35 data signal directly over single- or
multi-mode optic fiber for a transmission via optic cable line. At another end of the optic
cable, optical signal is demodulated into a V.35 data signal. V.35 interface may be directly
connected with the V.35 interfaces of image and data terminals or the WAN ports of MUX,
exchanger and router for a dedicated network setup or a LAN connection.
2. Product Features
 Rate N×64Kbit/s (N=1
～
32)
 Support the loopback of local analog/digital interface
 Support remote loopback function

Support pseudo-random code test function
 120km trunking -free transmission distance for single-mode optic fiber
 Capable to be communicated with FE1 Fiber Modem
 Available with complete line detection and alarm indications
 Available with independent structure and 19-inch Rack-mountable structure
Rack-mountable structure can be inserted with 16 modules
 AC 220V and DC –48V inputs may be selected for fiber optic modems of both structure
 For Rack-mountable fiber optic modems, dual power supply heat backup is provided to
ensure a high operating reliability
3. Specifications
Optic interface:
 Line mode type: CMI
 Line mode rate: 2.048Mbps

Operating wavelength:850nm,1310nm or 1550nm
 Optic fiber connector: SC/PC
 Applicable optic fiber: multi-mode, single-mode
 Transmission distance:
Single-mode: up to 120km Multi-mode: up to 2km
V.35 interface
：
 Data rate: N×64Kbps
（
N=1~32
）
 Available with CTS/RTS (Hardware) flow control function
 Type of connector: M34 connector
 Operating mode: DCE
Indicator lamps: To indicate the operating status of power supply, data receiving/sending,
loopback and random code test, code missing alarm, out-of-frame alarm etc.