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Release Notes for Cisco IOS Release 12.0(7)XV Feature Packs for the Cisco 800 Series
78-10446-01
Installation Notes
Well-defined mechanism for manufacturer-specific extensions
Multiple supplementary services
Figure 2 shows the components of the RCAPI implementation.
Figure 2 Components of RCAPI
CAPI and RVS-COM
The router supports the ISDN Device Control Protocol (ISDN-DCP) from RVS-COM. ISDN-DCP
allows a workstation on the LAN or router to use legacy dial computer telephony integration (CTI)
applications. These applications include placing and receiving telephone calls and transmitting and
receiving faxes.
Using ISDN-DCP, the router acts as a DCP server. By default, the router listens for DCP messages on
TCP port number 2578 (the Internet-assigned number for RVS-COM DCP) on its LAN port.
When the router receives a DCP message from a DCP client (connected to the LAN port of the router),
the router processes the message and acts on it; it can send confirmations to the DCP clients and ISDN
packets through the BRI port of the router. When the router receives packets destined for one of the
DCP clients on its BRI port, the router formats the packet as a DCP message and sends it to the
corresponding client. The router supports all the DCP messages specified in the ISDN-DCP
specifications defined by RVS-COM.
Supported B-Channel Protocols
The router provides two 64-kbps B channels to CAPI clients. Each B channel can be configured
separately to work in either HDLC mode or bit transparent mode. For CAPI support, layers B2 through
B7 protocols are transparent to the applications using these B channels.
WinFax
(non-CAPI)
Soft
modem
ISDN DCP
client driver
DCP messaging over TCP/IP
ISDN DCP
server driver
ISDN stack
Cisco IOS software - 800 series router
Virtual
com port
G4 fax
(CAPI)
CAPI
library
RCAPI client
29145
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