
8 ANALOG VOICE I/O CARD
3006M100-002
8-3
8.2
Compression Rates Supported
The card supports compression of the 64 Kbps voice stream to rates of 5.8 Kbps
or 8 Kbps using Algebraic Code-Excited Linear Prediction II (ACELP II); 40, 32,
24, or 16 Kbps (G.726); or 64 Kbps (G.711) on the system bus.
8.3
Line Interface Drivers
A line interface driver (LID) is a daughterboard which is mounted in connectors
J1, J3 and J5 on the Analog Voice I/O Card. The LIDs provide the interface
configuration for transformerless telephone connections (FXO and FXS only) and
control the signaling on the channel. Each Analog Voice I/O Card and its
associated port requires a LID.
LIDs are of five types: E&M 2-wire, E&M 4-wire, E&M 2/4-wire, FXO, and
FXS.
8.3.1
E&M Drivers
The E&M drivers provide connections to telephone equipment such as a PBX
using either a two-wire or four-wire voice connection. They can be configured to
comply with E&M types I, II, III, IV and V standards. The following paragraphs
describe the three types of E&M driver that are available. The LIDs support an
RJ-12 and a PB-45 port connector.
Figure 8-2 Analog Voice I/O Connector Plat
Summary of Contents for CX900e
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