The GCi Microfilter is a compact, symmetrical in-line unit that enables DSL to be deployed at the customer's premise without technical supervision. With ADSL service, phone lines are used to send and receive voice and data on the same line. The Microfilter enables simultaneous use of Internet and voice by isolating the noise caused by analog telephone devices such as telephone, answering machine, fax machine, and cable/satellite TV pay per view dial up from the ADSL signal.

• Compatible with Home Phone line Networking Systems
• Compact package, includes RJ-11 telephone connectors for ease of installation
• Patent Pending design
• Passes call waiting, caller ID and voice band signals while attenuating the higher ADSL data frequencies

The DSL Line provides high speed internet service and low speed telephone service. In order to use the same phone line, the high frequency DSL traffic must be split or eliminated from the low frequency telephone service. This is accomplished with a low pass filter, commonly referred to as a microfilter. This means that you will want to filter all of the telephone devices attached to your telephone line except the DSL modem connection. Types of telephone devices that will need to be connected through the microfilter are telephone sets, answering machines, fax machines, caller ID machines, bells and other ancillary telephone devices.

GCi Microfilters are used to connect telephones at the customer's premise to the premise's DSL line. The microfilters ensure that DSL frequencies do not interfere with proper operation of voice band telephone equipment.

Electrical Specification:

@ 25 Degree Celsius Operating Temperature – 40 to 65 Degree Celsius

• DC resistance through T&R (Tip & Ring) to the telephone port is 25 ohms max.
• Impedance @ 300 Hz ~ 3.4 kHz 600 ohms
• 3 dB cutoff point, line to telephone port 10 kHz +/- 1.5 kHz
• off hook insertion loss @ 1 kHz 1.0 dB max
• Longitudinal Balance @ 200 Hz ~ 1 kHz -65 dB Min
• Longitudinal Balance @ 200 Hz ~ 1 kHz -55 dB Min
• Return Loss @ 300 Hz ~ 3.1 kHz 6 dB Min
• DC current (loop current) 100mA
• In band ripple 1dB Max
• RJ-11 modular jack connection for line & telephone port

The customer can easily install any of the DSL filters.

The procedure for installing the GCi Microfilter in-line style filters to equipment such as telephones and fax machines are as follows:

1. Unplug the existing telephone cord from the wall jack.
2. Plug the RJ-11 of the GCi Microfilter to the wall jack.
3. Plug the station cord (removed from wall at beginning of procedure)
   into the filter jack (labeled "PHONE").

Please Note: These Filters Should Not Be connected to the DSL Modem Line.