Cisco Factory 8MB to 12MB upgrade 800Series (B) MEM800-8U12F Manual De Usuario

78-10446-01

Figure 1 shows how CAPI connects applications, drivers, and controllers.

The framing protocols supported by CAPI include High-Level Data Link Control (HDLC), HDLC
inverted, bit transparent (speech), and V.110 synchronous/asynchronous. CAPI integrates the following
data link and network layer protocols:

Link Access Procedure on the D-channel (LAPD) in accordance with Q.921 for X.25 D-channel
implementation

Point-to-Point Protocol (PPP)

ISO 8208 (X.25 DTE-DTE)

X.25 DCE, T.90NL, and T.30 (fax group 3)

CAPI supports the following features:

Basic call features, such as call setup and tear-down

Multiple B channels for data and voice connections

Multiple logical data link connections within a physical connection

Selection of different services and protocols during connection setup and on answering
incoming calls

Transparent interface for protocols above Layer 3

One or more BRIs as well as PRI on one or more Integrated Services Digital Network
(ISDN) adapters

Multiple applications

Operating-systems-independent messages

Operating-system-dependent exchange mechanism for optimum operating system integration

Asynchronous event-driven mechanism, resulting in high throughput

Controller 1

Application
Facsimile

Controller 2

Controller 3

Controller 4

26485

Application
Telephone

Common ISDN API (CAPI)

Application
File Transfer

Application
Other