ZyXEL Communications ISDN Terminal Adapter Omni.Net Lite Manual de usuario Pagina 11

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OPERATING SYSTEM SUPPORT
Windows9x/NT This is the principal target market for vendors so all hardware now
supports this platform, usually via PnP with an INF file and drivers provided on flop-
pies or CD.
Several of the hardware devices profiled in the table include useful utilities to test the
ISDN line or display onscreen the connection and throughput status as well. The PnP
routine will install one or more special ISDN COM ports; these are then associated in
Dial Up Networking (DUN) with icons to dial the selected ISP. For this one needs only
the username, password, dialin number and DNS IP addresses (primary and backup).
Windows 3.1 ISDN works fine with Windows 3.1, the most popular GUI at ISDN’s
birth. Recent hardware does not gracefully install, but ingenuity solves this problem
for the determined using an internal ISDN card or external device connected via serial
port. Windows 3.1 does not support USB.
For an internal PC card running directly off the bus, Microsoft provides detailed in-
structions for installing TCP/IP ("Enabling the Microsoft TCP/IP Protocol with WFWG
3.1"); see Resources below. The actual TCP/IP code is contained in file TCP32b.EXE
and is a 674 kb download from the Microsoft site. Windows for Workgroups contains
the RAS dialer which is then configured to use an ISDN COM port similarly to the case
for Win9x. See "How to Install ISDN on WFWG 3.11 RAS".
The procedure differs for an external Terminal Adapter, which looks just like any
modem employing the Hayes command set. Windows itself cannot address such a
device due to its 57 kbps maximum throughput speed. However the shareware
Trumpet Winsock provides a dialer which can be configured to dial with AT commands
and authenticate using PAP just like the Win9x DUN utility. Obtain per details in the
Resources box.
To configure Trumpet Winsock first determine the proper initialization string for your
external Terminal Adapter; this will appear in its INF file; or look at the string in a
successful DUN install. For example a default Trumpet Winsock initialization string
might be &F&C1&K3, while one of the Terminal Adapter’s strings (for a 64 kbps PPP
link) is E0Q0V1X1&C1%A2=5. Then:
1-Install Trumpet Winsock and click its icon to run.
2-In the Trumpet Winsock window, choose File/Setup.
3-Enter the following settings :
IP Address : 0.0.0.0
Name Server : [DNS IP addresses provided by your ISP]
Domain Suffix : [ISP’s domain name]
MTU : 576
TCP RWIN : 2048
TCP MSS : 512
4-Click OK
5-Choose File/PPP Option; the PAP Authentication Option dialog is now displayed.
Enter your username in the "User name" field and your password in the Password
field; then click OK to close.
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