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<td BACKGROUND="bar-middle.jpg" HEIGHT=60><FONT FACE="Arial,Helvetica"><FONT SIZE="+1"><FONT COLOR="#FFFFFF">AHFC-SUA</FONT></FONT></FONT></TD>
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<H3>
Functions</H3>
The AHFC-SUA is an active HDLC B- and D-channel controller with integrated
S/T interface, CPU UART, keyboard interface, PCM30 highway interface and
two CODECs for analog connection. It is used for ISDN basic rate lines.
All channels (2B+D) are served full duplex by six deep FIFOs. The implemented
PCM30 highway interface is able to connect to MITEL ST(TM) bus (MVIP(TM)),
Siemens IOM2(TM) or GCI(TM).
<BR><BR>
<BR>
<H3>
Block Diagram</H3>
<IMG SRC="ahfc-sua.gif" ALT="AHFC-SUA Block Diagram" HEIGHT=344 WIDTH=650><BR>
<BR>
<BR>
<H3>
Features</H3>
<UL TYPE=SQUARE>
<LI>
FIFO-Depth:</LI>
<BR>B-channel: 4x 7.5 KByte, maximum 31 HDLC frames per FIFO
<BR>D-channel: 2x 512 Byte, maximum 15 HDLC frames per FIFO <BR><BR>
<LI>
independent read/write HDLC-channels for two ISDN B-channels and one ISDN
D-channel</LI><BR><BR>
<LI>
56 KBit/s restricted mode for U.S. ISDN lines selectable by software</LI><BR><BR>
<LI>
full I.430 ITU S/T ISDN support in TE and NT mode</LI><BR><BR>
<LI>
2 integrated CODECs for connection of analog devices (e. g. phone or fax)</LI><BR><BR>
<LI>
PCM30 interface configurable to interface MITEL ST(TM) bus (MIVP(TM)),
Siemens IOM2(TM) or GCI(TM) for external CODECs</LI><BR><BR>
<LI>
integrated CPU</LI><BR><BR>
<LI>
integrated RS232 interface (UART) and keyboard interface for external key
matrix</LI><BR><BR>
<LI>
CMOS technology 3V-5V</LI><BR><BR>
</UL>
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