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- Path: nntp.crl.com!clone
- From: JAtwood@a.crl.com (Jeff Atwood)
- Newsgroups: comp.dcom.modems
- Subject: USR Sportster Vi DSVD testimonial
- Date: Sun, 11 Feb 96 08:00:43 GMT
- Organization: ACME International
- Message-ID: <4fk7ii$ao0@nntp.crl.com>
- NNTP-Posting-Host: 168.75.129.10
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-
- Hello all,
-
- Just wanted to relate my experiences with the USR Sportster Vi DSVD 28.8
- modem, and ask a few questions.
-
- First of all, these things actually work. I guess I've been around computers
- so long that it's amazing when a product actually lives up to the hype. Here's
- the scoop for those of you that are interested.
-
- First, you must append -SSE=1 to your AT command; this enables DSVD mode. It's
- off by default. Otherwise the modem acts like a "normal" V.34 modem in every
- way.
-
- When a data/voice connection is initiated, the handset is muted. Then, after a
- brief pause while the modems connect, there is a short scratchy noise, a
- series of beeps, and then BAM! you're connected via the modem and you can
- talk, too. The voice channel is amazingly clear for 9600kbps! That's not to
- say that it's crystal clear, but there is little or no loss in voice
- quality, just a little scratchiness around the edges. Sometimes I got a
- strange "echo" effect on my end, but the voices were still relatively clear.
-
- According to USR, 9.6kbps goes to the voice channel and 19.2kbps goes to the
- data channel. However, we were getting around 2300 cps for data transfer while
- talking, so the voice channel can't be taking up very much or else it's being
- compressed.
-
- At any time during the connection, you can hang up the phones, which closes
- the voice channel and the data channel gets full 28.8kbps. This does indeed
- work; once we hung up, our transfer rate went up to about 2650cps.
-
- During a data connection, if you pick up the phone, the modem "rings" on the
- other end. The phone itself does not ring; just the modem. And you hear a
- ringing tone on the handset. Once the person on the other end picks up the
- handset, there is a short scratchy sound and then you're talking to the other
- person again. The transfer rate goes back down to 2300cps or so.
-
- Furthermore, we played an extensive (2+ hour) game of Duke Nukem 3D over the
- modem while talking to each other, and had no problems at all. I'm very
- impressed with this product!
-
- One of the nicest things about it is that you can effortlessly switch between
- voice, voice/data, and data. It struck me while transferring files and doing
- other collaborative things with the person on the other end that this was just
- a far more natural way to work with modems. You can really walk someone
- through sending you a file, or tech support, or just get more work done rather
- than resorting to a second line for the same effect. Suffice it to say that I
- am very satisfied with the product!
-
- Now, for the questions.
-
- 1. Will DSVD modems from different manufacturers work together? The documents
- I could find related to this on the WWW seem to indicate "yes," that any modem
- branded DSVD follows the DSVD spec and will interoperate. Anyone know for
- sure?
-
- 2. What's this I head about ASVD and the other technologies that are to
- "supersede" DSVD? Fortunately, this USR model is the only Sportster that has
- flash ROM, so I assume that USR will keep me current.
-
- Jeff Atwood
- JAtwood@a.crl.com
-