I am trying to connect to my office network, using a laptop with built
in modem, via a hotel phone line (grand hyatt) in Beijing.  The number is correct,
as I hear it dialling and answering in the UK (where the office is)
and it rings a couple of times.  But then it cuts off and I get 'error
676 : the line is busy' and cannot continue. How can the line be
'busy' if I can hear it ring at the other end? What is kicking me off
after a couple of rings?

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Request for Question Clarification by tutuzdad-ga on 05 Nov 2005 17:44 PST

There are many factors that might be causing your problem(s) so it
would be impossible for us to pinpoint exactly which one it is. Here
are some troubleshooting tips for possible causes. Please take a look
at this page and see if you find a solution. I trust you will let me
know if one of them works.

DUNS ERROR 676
http://www.modemsite.com/56k/duns676.asp

tutuzdad-ga

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Request for Question Clarification by tutuzdad-ga on 05 Nov 2005 17:49 PST

PS:  To save some time, if you correct one problem only to get a
different error, here is a list of all the Dial-up Networking (DUN)
codes and many solutions to them.

DUN ERROR CODES
http://www.modemsite.com/56k/dunserror.asp

Please let me know if I've helped in lieu of an actual diagnosis.

tutuzdad-ga

Things to try

http://support.earthlink.net/mu/1/psc/img/walkthroughs/windows_9x_nt/dialers/dial-up_connections/6791.psc.html

http://www.modemsite.com/56k/duns676.asp

There may be too much interference on an international line to get a connection.

I resolved a similar problem by disabling busy signal detection on the
modem--generally accomplished by using "AT X1" as an initialization
string.

My guess is that the modem is detecting the international ring as a
busy signal. Since it is a hotel, I wouldn't use an ATX1 as this turns
off the dial tone detection as well as busy signal detection.
Go to your connection properties, additional settings and type in atx2
for the initialization string, this will allow for dial tone detection
to ensure you are not messed up if the hotel has a delayed dial tone.

All versions of Windows - This error can occur if:

    * You are dialing the wrong number
    * There is a problem at your ISP or in the telephone network
    * You have voice-mail or other custom calling feature that
produces a stutter dial-tone
    * You haven't specified the proper country settings for your modem
and the number you are dialing, or your modem doesn't support the
country you are in.
    * If you include the disable call waiting code in your dialing,
and your phone line does not support call waiting; or, if you have
call waiting, but your phone company doesn't support the disable call
waiting code.

Check the settings for the DUNS Connectoid you are using.

If you have voice-mail or other custom-calling feature that produces
stuttered dial-tone, you may be able to eliminate the problem by
disabling dial-tone or busy detection: Add x to extra settings to
disable busy and dial-tone detection; add x2 to extra settings to
disable only busy detection.

If your modem doesn't offer support for your country, disabling
dial-tone/busy detection (x in extra settings) might work (only if
tone or pulse dialing for selected country is compatible with yours).

Use modem's speaker to listen to connection attempt: Make sure it
dials, and make sure you do not hear a busy signal.

Examine Modemlog to see what number is actually being dialed. (If #
dialed is not displayed, adding E1 to extra settings may help.)

Try dialing with pulse instead of tone; Try increasing the tone
duration. [ s11=120 ]

Windows NT - Error 676 line busy is reported when you should receive a
'No Dial Tone' 680 error. This was first correct in SP6.

Windows 98 - Depending upon the method you use to connect to your ISP,
this error may occur even if you have configured automatic re-dial
when the line is busy.

Please feel free to contact local hotel IT support,I think you have
not the access to dial up the number in that hotel.