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- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!seismo!lll-winken!telecom-request
- From: lfil@athos.az.stratus.com (Lonnie Filbrun)
- Newsgroups: comp.dcom.telecom
- Subject: Re: Can Paging Software Detect Alphanumerics?
- Message-ID: <telecom13.40.3@eecs.nwu.edu>
- Date: 23 Jan 93 13:11:02 GMT
- Sender: Telecom@eecs.nwu.edu
- Organization: Stratus Computer Inc, Marlboro MA
- Lines: 83
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 13, Issue 40, Message 3 of 13
-
- Hello,
-
- As a tech from *S W*ST Paging I used all models of BBL 3, 3r, 4x, DSS
- 1, Glenayre GL3000L, M, S, UniPage, and also Motorola paging
- terminals.
-
- Like mentioned before the most common action is to parse the
- alphanumeric data entered and only transmit numerics giving no
- indication of the intent to send alpha to a numeric display pager.
-
- ---------------------from IXO/TAP protocol---------------------
-
- The response to each block is one of four:
-
- 1. "<optional message sequence><CR><ACK><CR>"
- OK, send next block.
-
- 2. "<optional message sequence><CR><NAK><CR>"
- Checksum or transmission error, send last block again.
-
- 3. "<optional message sequence><CR><RS><CR>"
- Abandon current transaction and go to next. <RS> may occur
- when the checksum is OK, but the current transation violates
- a system rule.
-
- 4. "<optional message sequence><CR><ESC><EOT><CR>"
- Begin disconnect.
-
- Any of the responses may have an optional message sequence before
- them, although the system designer should understand the consequences
- to the user with all planned entry devices.
-
- It is expected that many systems will save their message sequence
- responses until immediately before disconnect. For some entry devices,
- it may also be desirable that messages describing non-checksum errors
- associated with a particular transaction in a PG service will begin
- with the letter ID followed by the contents of field 1 for that
- transaction.
-
- After reception of an <ACK> or <RS> for the last transaction in a
- given service, the entry device sends <EOT><CR> meaning there are no
- more transactions remaining in this service.
-
- An optional message sequence may be sent at this time to indicate the
- degree of acceptability of information in all transactions received
- during the current interchange. Although optional, this message is
- highly desirable.
-
- example:
- 1 PAGE(S) SENT.<CR>
-
- An <RS><CR> should be sent at this point if the paging central finds
- any data <ACK> in step 8 (step 8 is where it sends the one of four
- responses) by the system to be unacceptable because of content (eg, an
- invalid pager number or a message field inappropriate for the type of
- pages, etc. see #2)
-
- ( #2 It is most desirable to catch all types of errors in step 8, but
- practically, some systems will be too slow to catch content errors as
- they happen.)
-
- ------------------------
-
- Using a datascope, you might want to experiment trying to send invalid
- pager numbers, alphanumerics to a "known" numeric pager and check the
- output of the last step above for it may tell you something useful.
-
- As to getting the terminals manufacturer to upgrade their code to
- implement a fix, hope you want to buy alot of paging terminals!!! :-)
-
- Hope this helps!
-
-
- Regards,
-
- Lonnie
-
- #import <stdDisclaimer.h>----------< NeXT Mail Welcome >-------
- Lonnie L. Filbrun Lonnie_Filbrun@vos.stratus.com (SOS Mail)
- Stratus Computer, Inc. lfil@az.stratus.com (NeXT Mail)
- Customer Assistance Center (602) 858-3152 (Voice Mail)
- Telecommunications Division (602) 231-9447 (Alphanumeric Access#)
-