Modem - Dell LATITUDE D620 User Manual

Dell - Latitude™ D620 - Printer-Friendly Format
In addition to the new audio chipset, the Latitude™ D620 also use the Intel® High Definition Audio Codec, code-named Azalia, as part of
the modem setup. As the modem features become increasingly integrated with the audio controller, this integration is a logical
evolutionary step and enhances the modem capabilities.
The modem itself is a Conexant® HDA D110 MDC. It is located under the palm rest of the system. For this reason, the modem is a
FRU.
The new Conexant modem using the Intel codec has some of these features:
Base driver supports modem functionality
Supports V.92 and V.44 standards (details below)
NOTE:
The star on the tab of the modem itself identifies it as an RoHS-compliant
modem. It should not be replaced with older modems that do not meet this
specification.
V.92 is a dial-up modem specification from the International Telecommunications Union (ITU) that introduces several new features
designed to improve modem performance, including Modem-on-Hold™, QuickConnect, and PCM Upstream data transmission.
1. Modem-on-Hold — Allows you to receive an incoming telephone call while you are connected to the Internet on the same
phone line.
2. QuickConnect — Reduces the time it takes for the computer to connect to the ISP. With QuickConnect, the modem identifies
the phone line characteristics during a data connection, saves this information, and uses this data to compare line quality
variables when making a future connection with the same server modem. The amount of time saved varies on each phone line.
3. PCM Upstream — Increases the upstream data rates from the system to the ISP, which reduces the upload times for large files
and e-mail attachments. A maximum upstream data rate of 48 Kbps is possible, compared to the previous V.90 standard and
maximum upstream data rates of 31.2 Kbps.
NOTE:
The modem is currently v.92 capable. However, the PCM Upstream feature is ISP dependent.
While PCM Upstream does increase upstream speeds, it also reduces download speeds at the same time. Because of this, Dell
has disabled PCM Upstream on the computer.
The Modem-on-Hold (MOH) feature requires an applet to put the modem on hold to receive the incoming call or to place an outbound
call on the other phone line. Modem-on-Hold is disabled by default.
NOTE:
MOH requires call waiting service from the phone company and V.92 support from the ISP.
V.44 compression is a new ITU standard designed to improve data compression rates between the computer and the ISP. These higher
compression rates, which increase between 20 and 60 percent on average and as much as 200 percent, mean more data can be
downloaded in the same amount of time. Since HTML text files are highly compressible, you notice the most significant improvement
when browsing and searching the Web.
Some of the specs for the modem are listed below.
Modem Specifications
56K modem V.92 with software upgradeability
Data modem Supports V.92 upstream to 48Kbps and V.90 Data Mode with autofallback to K56flex, V.34.
standard
Error correction Supports Data Mode Error Correction V.42 LAPM and MNP 2-4 error correction
Data compression V.42bis, MNP 5, and V.44 data compression
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22/02/2010