The Sunrise Telecomm - SunSet E20 is? an easy-to-use tester for 50b/s to 2.048Mb/s digital circuits. The unit has full duplex drop and insert capability, both sending and measuring of test tones on in-service 2.048Mb/s. The SunSet E20 can test a number of networks, including Frame Relay Networks, Cellular Networks, Access Networks, and simple Leased Line Networks