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1. INTRODUCTION:
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The purpose of the custom software is to make the X900 emulate the line
and exchange parts of the sending and receiving of faxes via the PSTN network
including the on/off hook transitions, dial tones, dialling and line
driving/receiving phases of a fax message. Please note that only MF dialling
is supported by this software.
2. EQUIPMENT CONNECTION:
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a. Connect EXTERNAL to SLAVE on the X900 front panel using a
straight-through cable.
b. Connect unit under test ('UUT') to MASTER 1 on X900 front panel.
c. Connect reference unit ('REF') to MASTER 2 on X900 front panel.
3. SENDING AND RECEIVING FAXES:
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Having downloaded the custom software together with version 3.34 of the
X900 standard software to the X900, the fax tests may be accessed by
selecting option '1. General Operational Tests' from the main menu followed
by option '8. Customised Tests'.
To send a fax from the unit under test to the reference unit select
option 1. The following sequence of events will then take place:
(i). Prompt for correct cabling and connections.
(ii). The X900 waits for the UUT to go off-hook. If the UUT does not
go off-hook within ten seconds, the test finishes with an
appropriate information message.
(iii). Once the UUT is off-hook, the X900 sends a dial tone to it.
(iv). The X900 waits for the UUT to dial and disables the dial tone
once dialling starts. The X900 simply detects the presence of
dialling - no particular number is required to be dialled.
(v). The X900 assumes that dialling has finished if no MF tones are
detected from the UUT for about two seconds. It then rings the
REF unit.
(vi). The REF unit is required to answer within a user-programmable
number of rings. If it does not answer in time, an appropriate
information message is output and the test finishes.
(vii). If REF answers in time, establish UUT to REF connection so UUT
can send a fax to REF.
(viii). The test is finished when UUT goes on-hook after finishing fax
transmission.
To run this test from an autotest sequence, use the word 'SEND-FAX'.
To receive a fax at the unit under test from the reference unit, select
option 2. The ensuing sequence of events is similar to that given above
for sending faxes but with the roles of UUT and REF reversed.
In brief:
(i). Prompt for correct cabling and connections.
(ii). Detect REF off-hook within timeout.
(iii). Dial tone to REF if off-hook.
(iv). Detect dialling on slave REF.
(v). Disable dial tone to slave REF if dialling detected.
(vi). Ring UUT.
(vii). If UUT answered, connect UUT and REF. UUT receives fax.
(viii). Terminate session when REF goes on-hook.
To run this test from an autotest sequence, use the word 'RECEIVE-FAX'
4. SETTING UP DIAL TONE AND RINGING PARAMETERS:
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It is possible to set the dial tone and ringing characteristics for
the REF unit separately from the UUT. The UUT gets its settings for these
parameters from the standard test spec.
To alter the REF settings starting from the main menu, enter '4. System
Set-up menu', enter system password, '4. Setup Tests Menu', '8. Customised
Tests' at which point the necessary menus will appear.
© Electron Parametrics Ltd 2002. This document may be reproduced in whole or in part provided that this copyright notice is reproduced on each copy made.
All trade marks recognised.
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