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Text File | 1992-08-04 | 11.4 KB | 247 lines | [TEXT/ALFA] |
- D R A F T 7/8/92
-
- UUPC and the Communications Toolbox
- -----------------------------------
-
- Starting with version 3.1b6, uupc supports the Macintosh Communications
- Toolbox. That is to say, uupc can use the Connection Manager, and any
- available connection tool, in place of the Serial Driver (the Serial Driver
- interface still works, naturally!).
-
- Support in 3.1b9 handles both inbound and outbound calls. Performance
- should be comparable to the Serial Driver implementation. There are
- probably still bugs which may cause irregular behavior or crashes.
-
- Basic philosophy
- ----------------
-
- When you use the Serial Drivers, you can use either of two methods to cause
- your modem to place a phone call to your neighbor site. These methods are
- selected via options in the site's line in your Systems file.
-
- * You can specify one of uupc's built-in dialers (either HAYES or VADIC),
- specify the baud rate and phone number, and let the uupc dialer talk to
- the modem, autobaud it, dial, and interpret the CONNECT or BUSY messages.
-
- * You can specify the DIR (direct-connection) "dialer", which simply
- opens the serial port connection; your chat script (the expect/send
- strings) must send commands to the modem and wait for the modem's responses.
-
- When you use the Communications Toolbox, you have both of these options,
- and even more. You can use the dialing or call-connection facilities
- in a CTB connection tool; you can use a CTB tool to give you access to a
- modem or serial port on your Mac, and use uupc's HAYES dialer to place the
- call; or, you can use a CTB tool to access a serial port, and drive the
- modem yourself via a chat script.
-
- Setting up a Communications Toolbox configuration
- -------------------------------------------------
-
- Access to the Communications Toolbox takes place through connection
- records, which you must configure using menus and dialogs.
-
- To create a new connection record, select "New..." from the "CTB" menu.
- A dialog box will pop up, selecting a default connection tool (usually
- the Apple Serial Tool). Choose the tool that you really wish to use...
- e.g. the Apple Modem Tool, Apple ADSP Tool, or some other tool... and
- configure it with whatever information, options, phone numbers, network
- addresses, etc. are relevant. Click the OK button. You'll be asked to
- enter the name under which this configuration should be stored... do so
- (names which do not contain blanks are preferred).
-
- To alter an existing configuration, choose its name from the CTB menu,
- edit the configuration, and click OK. The configuration will be updated
- and stored.
-
- To duplicate an existing configuration, hold down the shift key and
- select its name from the CTB menu. The configuration will be "cloned" and then its
- dialog box will appear. Make any changes you want (which will apply to the
- new version, not the original!) and click OK. You'll be prompted for
- the name under which the new configuration should be stored.
-
- To delete an existing configuration, hold down the option key and select
- its name from the CTB menu. A confirmation dialog box will appear;
- click Delete or Cancel as appropriate.
-
- Using Communications Toolbox configurations
- -------------------------------------------
-
- In order to use a connection tool to place a call to one of your uucp
- neighbors, you must modify the neighbor's line in your Systems file. In the
- field which normally specifies a serial-port name (usually "a" or "b),
- place a string of the form "CTB/configurationname". The "configurationname"
- should be the name of a CTB configuration that you have created and saved.
- When you place a call using the information in this line in the Systems
- file, uupc will bypass the Serial Driver, load the CTB configuration you
- specified, and use it to initiate a connection
-
- Accessing auxiliary serial ports
- --------------------------------
-
- The simplest way to use a CTB tool is to use it to give you access to
- a serial port on your Mac. This is usually done with the Apple Serial
- Tool. Using this tool, you may specify the modem port, printer port, or
- any auxiliary port which has been registered with the Connection Manager.
-
- For a connection of this sort, you will usually specify the HAYES dialer,
- and allow uupc to dial the call for you. You may, if you wish, specify
- the DIR non-dialer, and place the call "manually" using the chat
- script.
-
- Using a Modem Tool (Apple's or otherwise)
- -----------------------------------------
-
- You may wish to use the Apple Modem Tool to establish a connection with one
- or more of your neighbors. The Apple Modem Tool supports a number of
- popular modem types, and supplies certain features that uupc's built-in
- HAYES dialer does not (automatic redial, RTS/CTS flow control, "soft"
- hangup using the Hayes +++ escape sequence, etc.). To do this, you must
- create a CTB configuration which selects the Apple Modem Tool, and
- specifies whatever options you feel are appropriate.
-
- When you use a Modem Tool to place a call, you will NOT be using the
- HAYES dialer which is built into uupc. For this reason, you MUST specify
- the "DIR" (direct connection) non-dialer whenever you use a Modem Tool to
- place a call. Otherwise, massive confusion will result!
-
- You may, if you wish, store the phone number in the CTB configuration, and
- omit the phone number from the line in your Systems file (simply put a
- hyphen in the phone number field). You'll probably want to use this
- approach if you have only a single uucp neighbor, or if you decide that
- you'd rather have one CTB configuration per neighbor.
-
- Or, you may leave the phone number out of the CTB configuration, and
- specify it in the Systems file (just as you normally do when using the
- built-in Hayes dialer). If the phone number is present in the Systems file,
- it will override the number stored in the CTB configuration record. This
- allows you to use one CTB configuration to place calls to two or more
- neighbors.
-
- Similarly, you may specify the baud rate in either of two places - in the
- CTB configuration record, or in the Systems file. If a baud rate is
- present in the Systems file, it will override the baud rate in the
- configuration record; if the baud-rate field in the Systems file simply
- contains a hyphen, it is ignored, and the baud-rate field in the
- configuration record is used.
-
- Using other connection tools
- ----------------------------
-
- You can use other sorts of connection tools... for example, the Apple
- ADSP Tool... in much the same way as you would use a Modem Tool.
- Fill out the connection information completely, store it, name it in the
- CTB/port field in the Systems file entry, and use the DIR direct-connection
- non-dialer.
-
- You may pass options to a connection tool, by placing them in either the
- baud-rate or phone-number fields in the Systems file. Options are specified
- as a single string of the form:
-
- 'name value name value'
-
- where the names and values of the options are defined by whatever Connection
- Tool is being invoked. uupc simply passes these options through to the
- tool, and passes back any error information it receives in return. It
- does not attempt to interpret these options itself. Don't put more than
- 127 characters (excluding quotes but including quoted spaces) in either of
- these fields, or Bad Things will happen.
-
- Listening for inbound calls
- ---------------------------
-
- To receive incoming calls using a CTB tool, set up the configuration in
- the usual way. In the Systems file line for the INCOMING pseudo-neighbor,
- specify "CTB/configurationname" in the device field, either "DIR" or "HAYES"
- in the dialer field, and specify "@" in the phone-number field. You should,
- as always, specify the "HAYES" dialer only if you're using the Serial Tool...
- for other tools, specify "DIR", and let the tool itself listen for the
- inbound call.
-
- Tool-supplied progress windows
- ------------------------------
-
- Some connection tools, such as the Apple Modem Tool, will put up a non-modal
- dialog box when opening or closing a connection. uupc 3.1 suppresses the
- appearance of these dialog boxes when it's run in the normal (no-debugging)
- mode. The dialog boxes are enabled when debugging is turned on (level
- 1 or above).
-
- Examples of use
- ---------------
-
- In these examples, please assume that the following CTB configurations have
- been created and stored:
-
- modem - Serial Tool, accesses the modem port
- work - Apple Modem Tool, set up to dial my Sun at work
-
- #
- # Call my system at work, using the Serial Driver and the HAYES dialer
- #
- ntg Any a HAYES+&B1&M0 9600 5551212 g7 ID? GHOTI ogin: IAM word: TRUSTME
- #
- # Call my system at work, using the Comm Toolbox to gain access to the
- # modem port, and use the built-in dialer
- #
- ntg Any CTB/modem HAYES+&B1&M0 9600 5551212 g7 ID? GHOTI ogin: IAM word: TRUSTME
- #
- # Call my system at work, using the Apple Modem Tool. The phone number
- # and baud rate are already in the CTB configuration, and are not
- # respecified here.
- #
- ntg Any CTB/work DIR - - g7 ID? GHOTI ogin: IAM word: TRUSTME
- #
- # Call my system at work, using the Apple Modem Tool. Override the phone
- # number in the CTB configuration.
- #
- ntg Any CTB/work DIR - 5551313 g7 ID? GHOTI ogin: IAM word: TRUSTME
- #
- # Call my system at work, using the Apple Modem Tool. Override both the baud
- # rate and the phone number
- #
- ntg Any CTB/work DIR 2400 5551414 g7 ID? GHOTI ogin: IAM word: TRUSTME
- #
- # Listen for incoming calls using the Apple Modem Tool. It doesn't matter
- # if there's a phone number in the configuration, as specifying "@" here
- # will cause it to be ignored, and an inbound-call listening operation to
- # take place. If the caller requests the 'g' protocol, start negotiation
- # with a larger packet-size and window than is the default (this won't
- # affect the 'f' protocol if that's what the caller requests).
- #
- INCOMING Any CTB/work DIR - @ g7/128
-
- Caveats
- -------
-
- I've tested the incoming-call listener with the AppleTalk ADSP tool, over
- a Rube Goldberg sort of AppleTalk connection which involved a dialup
- Async AppleTalk connection, UDP, EtherTalk, a FastPath box, and LocalTalk
- to another Mac. It actually worked, much to my amazement. g3/64 sessions
- worked, with throughput limited to about 200 bytes/second over a V.32 link
- (too much latency). g7/128 didn't work, apparently due to timing and
- error-recovery problems in the protocol that I haven't chased down yet.
- The 'f' protocol worked like a charm with excellent throughput - not
- surprising, as it's intended to work over long-distance networks.
-
- I haven't yet run real-world tests on the incoming-call listener using
- the Apple Modem Tool - it should work, but I can't guarantee that it will.
-
- I've had rather poor luck trying to use the Apple Modem Tool (version 1.1)
- with high-speed, speed-buffered modems (those in which the serial port
- speed is locked at a higher rate than the modem-to-modem modulation).
- The Apple Modem Tool has an annoying habit of "blasting" Hayes-style
- commands at the modem at full speed. This seems to cause the command-
- autobauding logic in some modems to fail... not only does the modem fail
- to recognize the command, but it also goes into some severely confused
- state and won't recognize commands at _any_ speed until its power is turned
- off and then on again. I deliberately introduced delays into the uupc
- HAYES dialer to keep this from happening; there doesn't seem to be any
- way to persuade the Apple Modem Tool to insert similar delays.
-
- So - use the Apple Modem Tool at your own risk of frustration. At high
- line speeds, I find uupc's HAYES dialer to be more reliable.
-
- The code has not yet been extensively beaten upon. It may hang, crash,
- or defoliate your houseplants. No guarantees.
-
-