Jaton Communicator V.90 - Manual (Page 41)

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an outside line.
9, 555 3333 To get a pause
Solution B: You may be trying to dial into another area code; you must
first
dial a 1 before the phone number in your dialing string.
1 555 555 3333 To get into another area code
The other end could be busy or not answering.
Make sure the number you dialed is correct.
Test the number by dialing it on your telephone - not through
your modem.
If you are using the modem internationally, your modem may
not recognize the dial tone in the local country. Try the
command ATX3DT and the telephone number.