CT31E04 can conduct point-to-point transmission of Ethernet MAC frame data through 1 to 4 E1 channels, detect and use the effective E1 channels automatically, apply the reversed multiplexing technology to bind several E1 circuits together to transmit Ethernet data at 10/100Mbps, and allow certain transmission time delay between E1 circuits. This equipment can make efficient use of a large amount of existing E1 circuit sources in the networking to expand the Ethernet transmission distance and application range. The highest transmission rate is 7.68Mbps. It's best advantage is the broad transmission channel protected well, enabling stable working in bad situation.

-MII interface comply with IEEE 802.3 protocol standard supports 10M/100M full duplex/semi-duplex working modes.

-Capable of transmitting transparently the ultra long frame, and supports the Ethernet switch with VLAN function.

-Built-in dynamic Ethernet MAC address (10,000 addresses) list in the chip and the local data frame filtering function.

-Built-in SDRAM (256K Byte) controller.

-E1 interface comply with ITU-T G.703, G.704 and G.823.

-E1 interface module contains the built-in clock recovery circuit and HDB3 code circuit.

-Supports the availability checking and automatic troubleshooting of 1 to 4 E1 channels.

-Visible and audible alarm indication.

-Real-time error code monitoring and automatic protection of E1 channels.

-E1 line loop back function supported.

-Allows the maximum 8ms time-delay of 4 channels, the system can stop to send data automatically when the time-delay is big.

-QFP144 package by 0.35μm CMOS process.