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- 08/13/87
-
- The Racal-Vadic Primer v1.0
-
- or
-
- What's this blasted MANUAL ANSWER anyway?
- -----------------------------------------------------
-
-
-
- DISCLAIMER
- ------------
- Please be aware that since this mode is unsupported, there is the
- possibility that Telenet could start using a different brand of modem
- which would render this feature invalid. You are strictly on your own and
- therefore can not hold Telenet responsible for not making this mode
- available.
-
- Furthermore, this text was prepared ad hoc and is in no way a definitive
- guide to the operation and/or use of either PC Pursuit or the Racal-Vadic
- mode described herein. Any errors or ommisions are my own and I am sorry for
- any inconvience this may cause you. Please understand that by using this
- method of dialing you are totaly responsible for your actions and any
- consequences as a result of said use.
-
-
- OVERVIEW
- ----------
- The Racal-Vadic mode is an unsupported and to date, poorly documented
- feature of the outdial modems that are currently in use with PC Pursuit.
- It enables you to better understand what is happening at the other end of
- your connection by telling you what is happening. This type of operation is
- known as "call progression" because it gives you a response as the modem
- progresses through the phone call.
-
-
- ACITVATING AND DEACTIVATING THE MODE
- --------------------------------------
- The first thing we will cover is how to activate and de-activate the
- Racal-Vadic mode. Some of you may have already experienced the rather
- unexpected "MANUAL ANSWER" response after entering the Hayes command
- "ATZ". What has happened is that you have connected with a modem that
- is already in the Racal-Vadic mode of operation. When you entered "ATZ",
- the 'A' was sensed by the modem as the command to manualy answer the
- phone line. If this happens, just press your return key. This will make
- the modem return to command mode signified by the '*' prompt. While at
- this prompt you could enter an 'I' and then press return. This will make
- the modem <I>dle the Racal-Vadic mode and return you to the Hayes mode
- of operation.
-
- If, on the other hand, you were to receive the normal "OK" response
- from the modem after entering the "ATZ" command. You can activate the
- Racal-Vadic mode by entering <CTRL>-E and pressing the return key. The
- modem will now respond with "HELLO, I'M READY" and the '*' prompt.
-
- To summarize activation and de-activation:
-
- From the Hayes mode - <CTRL>-E and <RETURN> - to activate.
-
- From the '*' prompt - <I> and <RETURN> - to de-activate.
-
- I suggest getting into the habit of sending the de-activation sequence
- when you first connect to a city node so that you know exactly what mode
- the modem is in. You should also send an "ATZ" to make sure that the modem
- is operational by seeing if the modem sends you back an "OK" response.
- You can then send the activation command to enter Racal-Vadic mode.
-
- There are two cases where the modem will return by itself to the Hayes
- mode. The first is after you connect to a BBS. The other is while you're
- at the command prompt and haven't entered anything for a short period of
- time.
-
-
- DIALING
- ---------
- Now your ready to dial a phone number using the Racal-Vadic mode.
- To do this, just enter a 'D' followed by the number you wish to dial.
- For example, "D1234567", (pressing return of course!) will dial 123-4567.
-
- Well, we've dialed a phone number, what now? After all, any modem can
- dial a number, right? But not every modem can tell you what follows...
-
-
- RESPONSE MESSAGES
- -------------------
- The following is a short description of each response the Racal-Vadic
- mode can give you while dialing. They are, for the most part, self-
- explanatory. But there are a few things you should consider with some of
- them and I'll point those out just in case.
-
- DIALING... - The modem has detected a dial tone and is now dialing
- the phone number.
-
- NO DIAL TONE - Just what it means, no dial tone was detected. Try again,
- if you keep getting this then there is something wrong with
- either the modem or the telephone line on that end. Contact
- Customer Support and tell them you experienced this, tell
- them the city node you were connected to also.
-
- BUSY! - A busy signal has been detected. This is not the same
- kind of BUSY as you'd get in the Hayes mode. There is
- circuitry in the modem that can sense a busy signal, so
- it will return to the command mode quicker to allow you
- to decide what to do next. (Please see my note about the
- BUSY response below also)
-
- RINGING... - Self-explanatory.
-
- ANSWER TONE - Self-explanatory.
-
- ON LINE - Self-explanatory.
-
- FAILED CALL - The phone rang for ten times with no answer. Either the
- the BBS you called is down or no longer in existence, or
- you reached someone's home and they weren't there.
-
-
- REDIALING A NUMBER
- --------------------
- After you have received a BUSY! response you can re-dial the same
- phone number up to 9 times with the 'R' command. To use this command,
- enter an "R" and press the return key.
-
-
- DISCONNECTING WHILE ONLINE
- ----------------------------
- In a manner similar to the "+++" "ATH" Hayes command sequence, there
- is a two control code sequence that will dis-connect you from the BBS
- you are connected to. To activate it press <CTRL>-C then <CTRL>-D.
-
- Prior to disconnecting from the city node, make sure the modem is not
- in Racal-Vadic mode by issuing the <I>dle command. Be nice to others that
- may not be aware of this mode of operation yet!
-
-
- OTHER COMMANDS
- ----------------
- The command 'P' or '?' will print the following list of commands that
- the modem is designed to use. Since these are not needed in order to use
- the Racal-Vadic mode effectively they will not be discusssed. This list
- is here purely for your information.
-
-
- A MANUAL ANSWER
- D DIAL NUMBER
- G MANUAL ORGINATE
- I IDLE
- K PAUSE
- O OPTIONS
- P,? PRINT MENU
- R REDIAL
- T TABLE OF OPTIONS
- CONTROL A ALB TEST
- CONTROL (CD) DISCONNECT
- CONTROL D REQUEST DLB TEST
- CONTROL H BACKSPACE
-
-
- BEWARE THE BUSY
- -----------------
- The BUSY! response primarily indicates that the phone number you dialed
- was busy, common sense tell you that. What I want to point out to you in
- this section is that there are other possibilities that could mean that
- something else is actually occuring.
-
-
- a. CONTINUOUS BUSIES
- ----------------------
- The first thing to be aware of is Telenet's exchange lock-out feature.
- This prevents you from making a long-distance call or any local calls
- to exchanges that Telenet would be charged more than is profitable. All
- you will know is that you constantly get BUSY! responses when you dial a
- certain phone number. The response tends to be returned from the modem
- much quicker then a legitimate BUSY! for a valid phone number. This is
- not a hard and fast rule though. Two methods that are available to you
- for determining if this is the cause of the continuous busies are:
-
- 1. - Check the exchange lists provided by Telenet, if the exchange is
- not listed for the number your calling, you may as well stop
- wasting anymore time calling that number. It is a victim of the
- exchange lock-out.
-
- 2. - If the exchange is listed but you've always received a BUSY!
- response, try this. Hang-up from Telenet and dial the number
- direct. If you hear a busy signal you can continue trying some
- more, you may have latched onto a very, very busy system. But
- if the phone rings, hang-up immediately. This way you won't be
- charged for the call. You should then leave word with Customer
- Support or on the Net-Exchange that this happened. Telenet may
- have a typo concerning that exchange.
-
-
- b. RINGING... BUSY!
- ---------------------
- There are a few things that can cause this. Although I'm not talking
- about the RING BUSY RING BUSY... loop that can occure when you first
- connect to a city node. You can get out of that by rapidly and repeatedly
- sending an "ATZ" to the modem in an effort to break out of the loop. There
- is a narrow window where this will succeed, but it can be done.
-
- The main cause of this is by dialing a person's phone instead of a BBS.
- This will usually be followed by a variable number of rings prior to
- getting the BUSY!. Make certain that the phone number you have is really
- a BBS. If you've never called that BBS before, you may have a case where
- the BBS folded and someone else received the phone number after the sysop
- canceled that phone line. A BBS less than 6 months old or with less than
- 24 hour access can be highly suspect. New and odd-hour BBS's tend to come
- and go rather often.
-
- If you want to continue to dial this number, first call direct to make
- sure that it isn't a person's phone. Constantly getting a carrier signal
- in your ear is not a pleasurable experience. You would also be doing them
- a favor by letting them know that their new phone number used to be a
- BBS. If that's the case they've probably been getting a ton of bizzare
- calls, especially late at night, and could benefit from your call so that
- they can get their number changed.
-
- If, on the other hand, you receive a carrier signal, try the other
- Baud rate. if that doesn't work you could have reached a private system
- that is looking for a logon sequence immediately or will dis-connect you.
-
- Another possibility is that the BBS you've called has bombed and the
- modem is dutifully answering calls but there is no computer program
- operating to give you feed-back.
-
-
- CAVEAT
- --------
- What I've tried to cover here are the most common things that you may
- run into. But, by no means have I covered every base. There are points
- that I may have passed over completely because they have become second
- nature to me. Others may have not been explained to your satisfaction for
- the very same reason. And still other aspects may have been ignored because
- I'm simply not aware of them. In each and every case I ask you to leave
- word on the Net-Exchange as to what subjects are deficient or missing. That
- way I can expand this text to include your suggestions for the benefit of
- others.
-
- Thank you and good luck!
-
- Jack Radigan