Overview

The ETU04 is an inverse E1 multiplexer that will multi-link up to 4 E1 lines and offers simple, cost-effective connection between E1 service and 10/100BaseT LANs. The ETU04 inverse multiplexer transmits a 7.68Mbps Ethernet bridge channel over 4 E1 links. The ETU04 bridges the gap between E1 and E3, allowing bridges to operate at faster rates. It also provides high speed access to SDH/SONET backbones where the only access service available is E1 lines. The ETU04 supports 4*2.048Kbps G.703 E1 lines, for a line attenuation of up to 43 dB on twisted pair or coax cable. This provides an approximate operating range up to 2km (using 22AWG). The ETU04 fully meets El specifications including ITU-T G.703 and G.823. The ETU04 features diagnostic capabilities for performing remote loopback. The operator at either end of the line may test both the ETU04 and the line in the digital loopback mode. The Ethernet interface supports auto-negotiation, allowing plug-and-play Ethernet connection without any additional configuration.