E&M 2/4W CHANNEL UNIT-2 clei The E&M, 2/4W Channel Unit provides an interface of 600 ohms or 900 ohms to the 3600/3645 system and 2 and 4-wire E&M special service circuits. Operates as Type I, II and III signaling and Pulse Link Repeater (PLR). Attenuatio

E&M 2/4W CHANNEL UNIT-2 clei The E&M, 2/4W Channel Unit provides an interface of 600 ohms or 900 ohms to the 3600/3645 system and 2 and 4-wire E&M special service circuits. Operates as Type I, II and III signaling and Pulse Link Repeater (PLR). Attenuation range in 0.1dB steps. 4W Tx/Rx levels +7 to -16dBm, 2W Tx TLP levels of 0 to -12dB and Rx TLP levels of +6 to -10 dB. Requires 3600 equipped with Common Carrier Card (90-1234-01). Similar to 90-1230-01 but features revised. Tip and ring pinouts (while operating in 2-wire mode) and revised signaling pair access through the Test Card (90-1235-01-xx).