The MEM-4552 acts as a gateway between an
Ethernet network and an ASI environment.
The MEM-4552 generates a compliant DVB ASI
transport stream, with a settable Program Number
identifier, at a fixed settable data rate. When
Ethernet data is available to send it is encapsulated
into ASI packets. When there is no Ethernet data
available, NULL packets are used to stuff the ASI
stream to the selected rate.
On the receive side packets containing Ethernet data
are extracted from the ASI stream by reference to the
assigned Program Number.
The Ethernet port is set up automatically to accommodate most network environments. The ASI output rate is SNMP selectable to operate at a payload data rate of between 1 Mb/s and 213 Mb/s.
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The Ethernet port has automatic MDI/MDI-X
detection. This detects whether the Ethernet
interconnect cable is a straight through or cross over
type and automatically switches itself to
accommodate.
The output ASI stream is suitable for transfer by any
ASI type of signal path, such as IRT's ASI single and
MUX fibre link cards. G.703 rates can be set on the output to cooperate with ASI-G.703 products. For full duplex action a return
link is required. Note that the return ASI rate is independent of the outgoing ASI rate.
SNMP (Simple Network Management
Protocol) is included for remote
monitoring and control when used in conjunction
with IRT's 4000 series frame fitted with SNMP
capability.
The MEM-4552 is designed to fit IRT's standard 1RU and 4000 series 3RU Eurocard frames fitted with IRT's SNMP system.
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