BYC-C4 Interface Converters
1. Product overview
As a 4E1 to 10/100Base-Tx converter designed to transmit Ethernet data through several E1 channels, INV-4E1 can
conduct point-to-point transmission of Ethernet MAC frame data through one 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 of transparent transmission
design for the Ethernet data through one to four E1 circuits is 7.68Mbps. So it is a very good solution for the Ethernet
broadband access, easy to expand the application scope and transmission distance of Ethernet.
INV-4E1 is of high integration, strong reliability, low power, small size and complete function. It’s best advantage is
the broad transmission channel protected well, enabling stable working in bad situation. There is no adjusting point for the
installation of the whole unit, easy to operate and simple to maintain.
2. Features
¾
MII interface comply with IEEE 802.3 protocol standard supports 10M/100M full duplex/semi-duplex working
modes.
¾
Capable of transmitting transparently the ultra long frame, and supports the Ethernet switch with VLAN function.
¾
Built-in dynamic Ethernet MAC address (10,000 addresses) list in the chip and the local data frame filtering
function.
¾
Built-in SDRAM (256K Byte) controller.
¾
E1 interface comply with ITU-T G.703, G.704 and G.823.
¾
E1 interface module contains the built-in clock recovery circuit and HDB3 code circuit.
¾
Supports the availability checking and automatic troubleshooting of 1 to 4 E1 channels.
¾
Visible and audible alarm indication.
¾
Real-time error code monitoring and automatic protection of E1 channels.
¾
E1 line loop back function supported.
¾
Allows the maximum 8ms time-delay of 4 channels, the system can stop to send data automatically when the
time-delay is big.
¾
QFP144 package by 0.35µm CMOS process
3. Typical application
The INV-4E1 is not capable of fractional E1 operation or timeslot assignment. It should be used where only
unframed
，
transparent 2.048Mbps transmissions are available.
2
