Comtech CIC Series Interface Converters

Description

Features
For convenience, the CIC Interface Converter attaches directly to the modem using the 25–pin D subminiature data connector or short data cable (except for the CIC–35) to the modem. Additional features of the CIC converters include:
CIC–20
• Full–duplex capability
• Ext. TX IF mute control
• Up to 50 feet cable length
CIC–30
• Full–duplex capability
• 188 Byte data frame
• 270 Mbps transport rate for all data rates
• Up to 200 feet cable length
CIC–35
• Full–duplex capability
• Typical cable length to 150 meters (Belden 8281)
• Additional IBS/IDR overhead available (requires modem option)
CIC–50
• Clock recovery from user G.703 data
• Line build out to a maximum of 655 feet (typical)
• E1 G.703 data, AMI or HDB3
• T1 G.703 data, AMI or B8ZS
• Balanced connection to 15–pin D female connector
• Unbalanced connection to BNC connectors
• LED indication of signal loss and bipolar violations

Operation
The CIC series converters attach to the rear of the modem. No external power is required. The modems may be set for the following data rates:
CIC-20
• 64 kbps to 20 Mbps with an interface type of LVDS.
CIC-30
• 100 kbps to 2048 kbps with an interface type of EIA-422.
• Transmit clocking set to EXT allows the interface converter to recover the byte clock and data on the transmit ASI signal and
reformats this to serial data and clock using RS-422 format.
• The CIC-30 may be used with the CRS-200 switch by attaching the converter through a short data cable to the user port of the
traffic modem interface.
• It has an operating level of 800 mV ± 10%.
CIC-35
• 1 Mbps to 20 Mbps with an interface type of LVDS.
CIC-50
• The modem may be set for either 1.544 or 2.048 Mbps data rate with an interface type of EIA-422. All settings are made on the CIC-50 using three switches.
• Transmit clocking set to INT drives the modem’s internal transmit data rate clock to the converter on the ST lines to provide a high
stability reference for the G.703 clock recovery circuitry.
• The CIC-50 may be used with the CRS-200 switch by attaching the converter through a short data cable to the user port of the
traffic modem interface.
• Jitter and wander are per ITU Recommendations G.823 and G.824.
• The CIC-50 comes complete with an 8-inch cable (Part Number: CA/WR0056). The following longer length cables are available:
▪ 2 foot (CA/WR0063)
▪ 4 foot (CA/WR0064)
▪ 5 foot (CA/WR0066)