參數(shù)資料
型號: CMX228
英文描述: ISDN Protocol Engine? D-Channel Data??
中文描述: 綜合業(yè)務(wù)數(shù)字網(wǎng)協(xié)議引擎? D信道數(shù)據(jù)??
文件頁數(shù): 31/38頁
文件大?。?/td> 361K
代理商: CMX228
ISDN Data and Telephony Protocol Engine (inc. X.25)
CMX228
1999
Consumer Microcircuits Limited
1999
Chiron Technology Limited
31
D/228/1
1.6
Application Notes
1.6.1
General
The CMX228 is intended for use as part of an ISDN chipset. The CML recommended hardware
implementation contains the following elements (refer to Figure 3):
‘S’ bus interface via RJ45 socket.
RJ11 analogue telephone socket and analogue circuitry.
ISDN line transformer.
AMD79C30 S-interface controller.
Single asynchronous RS232 interface via 9-way or 25-way D-type connector.
64K bytes external RAM.
16K Non-volatile memory.
Ten processor controlled LED indicator signals.
HDLC drivers for the 2 ISDN B-channels, both channels can be used for data transfer.
Figure 3 Application Block Diagram
1.6.2
Approvals
The firmware and finite state machine embedded in the CMX228 have been used in products which
have gained ETSI CTR3 approval.
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