REAL AUDIO MODEM HANDSHAKES (Version 5 & up):
To hear good & bad modem handshakes (x2 &
Flex) - Click here
To hear 3Com V.90 handshakes - Click
here.
V.90 null speedshift
& retrains-Click here
3Com V.90 client to Livingston V.90 server handshakes -
Click here
Lucent V.90 client to 3Com V.90 server handshake
- Click here
Lucent V.90 version 5.15 with new DIL tones - Click
here
Rockwell V.90 client to Ascend V.90 server with new DIL - Click
here. (Thanks
to Jim Bell for
this handshake.)
3Com Courier & Sportster 5.0.0 V90 handshakes - Click
here
Lucent V.92 version 8.02 to V.90 servers - Click
here
Lucent V.92 version 8.02 to V.92 test server - Click
here
Note on V.90/V.92 Handshakes: Near
the end of a V.90 handshake, a new process was added: DIL (Digital impairment
learning). The (often distinctive) sound at this point is determined by
the client modem - not the server. It also depends upon the firmware
version in your modem. There are other (more subtle) variations in the
handshake that depend upon the type of server modem and firmware you are
connecting to.
V.92 Handshakes
Quick-connect can significantly reduce handshake time
using one or more 'shortcuts'. The actual handshake time with quick-connect
enabled may be almost the same as a V.90 handshake (first example), to almost
50% shorter (second example): USR
V.92 Quick Connect #1 (.mp3 format)
USR V.92 Quick Connect
#2 (.mp3 format)
Credit: Recorded by David Hollman with a USR5686E
Creative V.92 ModemBlaster QuickConnect (.mp3 format)
Credit:
Pim Heijnen
from
the Netherlands using Conexant chipset Creative Model #DE5721 V.92
Modem-on-hold and PCM Upstream connections - are available on this
page courtesy of Jarek Niewczas.
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