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- Path: hal.COM!elvey
- From: elvey@hal.COM (Dwight Elvey)
- Newsgroups: comp.dcom.modems
- Subject: Re: Class 1 or Class 2?
- Date: 27 Mar 1996 02:46:16 GMT
- Organization: HAL Computer Systems, Inc.
- Distribution: world
- Message-ID: <4jaa5o$ps3@news.hal.com>
- References: <31571298.7938264@shts.seed.net.tw>
- NNTP-Posting-Host: civic.hal.com
-
- In article <31571298.7938264@shts.seed.net.tw>, lamj@icacomp.com (Jason Lam) writes:
- |> Hello!!!!
- |>
- |> What is the main difference between Class 1 fax and Class 2 fax modem?
- |> Is class 2 better?
- |>
- |> Jason Lam
- |> Jason Lam
- |>
- |> E-Mail: lamj@icacomp.com
-
- Hi
- Class 1 specified the protocal between the computer and
- the modem so that the computer could manage FAX communications.
- Class 2 ( not a standard ) and Class2.0 include specifications
- for more than just the minimum. Many of the commands have been
- changed so that even to do the same level requires different
- command compatabilities. Class 2.0 specifies a lot of optional
- features. This means that if the modem manufacture should
- put this feature into their modem, Class 2.0 specifies how it will
- work with the computer. All of these options for Class 2.0 are
- just that options. Most low end ( less than $500 ) modems
- don't do anything more than minimum command recognition and
- don't implement any of the neat options.
- Lastly but not least, Class 2.0 also off loads much of the
- call progress to the modem. In Class 1 the computer
- manages most of the call progress, meaning that the quality
- of the computers software has a lot to do with the ability
- to connect with a lot of FAX machines. In Class 2.0 the
- computer doesn't have access to this lower level and depends
- on the quality of the modems software.
- Unless the modem came with a specific feature, related to
- one of the optional Class 2.0 features, I would say to
- stick with a Class 1 FAX modem. The performance differences
- between the two for most applications are small.
- IMHO
- Dwight
-