Site Preparation for FastSync 3780 Protocol using a Dial-Up Phone System |
| Install a standard dial-up
(switched) telephone line. Usually bi-sync communications cannot effectively operate
through your company's PBX (your telephone system) or a Centrex telephone system because
3780 is a block oriented Bi-Synchronous protocol - and it is not like using Asynchronous
communications. Normally your PBX will not have the necessary bandwidth to handle
large blocks of data. Have the telephone technicians bypass your in-house PBX telephone system and install a POTS (Plain Old Telephone System) analog line (see note below). In Canada, a Data Grade Line works best. IMPORTANT WARNING from 3COM: Connect your modem to an Analog line only. Using a non-analog line (e.g., digital, PBX, Multi-line) will damage the modem. |
Note: Using the AT&T 7 digit 1010288 access code. A few of CTI's customers in certain areas of the country who are sending file transfers have found that unless they are using AT&T as their long distance carrier, files will not go through! Libby Owens Ford is an example of one such company. CTI has found that using AT&T as your long distance carrier is usually best for most file transfers (especially for large files) rather than using carriers such as MCI and Sprint to name only two other carriers. If you are using, for example, Sprint as your long distance carrier, you can force the use of AT&T by entering an access code before the actual telephone number you wish to dial. For example, instead of using the normal 1-area code-telephone number, you can enter .CALL,1010288,1-area code-telephone in your command file.
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Note, in late 2001, one of our customers spent hundreds of dollars in trying to determine why his files were not being accepted by the Host system. The problem was finally resolved when our customer got off their internal PBX system and installed a separate plain telephone line!