DOCUMENT:Q78830  05-NOV-1999  [pcmail]
TITLE   :PC Ext: Reverse Carrier for Voice/Modem Switches
PRODUCT :Microsoft Mail For PC Networks
PROD/VER:WINDOWS:2.1e,3.0,3.0b,3.2,3.2a,3.5
OPER/SYS:
KEYWORDS:

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The information in this article applies to:

 - Microsoft Mail for PC Networks, versions 2.1e, 3.0, 3.0b, 3.2, 3.2a, 3.5 
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SUMMARY
=======

Voice/Modem switches are used to detect incoming modem calls and direct them to
a modem while allowing voice calls to go to a telephone. By default, the
Microsoft Mail for PC Networks External Mail program (EXTERNAL.EXE) uses reverse
carrier to call all Call/Request users. Reverse carrier causes the dialing modem
to call out its carrier, rather than waiting for the answering modem to speak
first. This is necessary for Voice/Data or Voice/Modem switches to work
properly.

This is a feature of the External program; there is no way to turn it off.
However, some modems have a setting for how long to wait after the dial, before
calling out their handshake carrier. For example, a Microcom 2400 baud modem has
an F7 setting. By setting that register to 30 in the modem script, the carrier
will sound immediately after the phone number is dialed; increasing the register
to 60 will delay the carrier several seconds.

For more information about reverse carrier, see the owner's manual for your
modem.

For more information about changing script files, see Appendix N of the Microsoft
Mail "Administrator's Guide."

Microcom modems are manufactured by Microcom Systems, Inc., a vendor independent
of Microsoft; we make no warranty, implied or otherwise, regarding this
product's performance or reliability.

Additional query words: 2.10e 3.00 3.00b 3.20 3.20a 3.50

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Keywords          :  
Technology        : kbMailSearch kbZNotKeyword3 kbMailPCN320 kbMailPCN320a kbMailPCN300 kbMailPCN300b kbMailPCN350 kbMailPCN210e
Version           : WINDOWS:2.1e,3.0,3.0b,3.2,3.2a,3.5

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