Telephone CLI add-on ?

[Nigel Cook]

Starting with a Binatone Clip 100 Caller Line Indicator
I wish to add a home-brew to to indicate when the
caller has "Withheld" his number and the "Unavailable" situation
so i don't even have to break away from whatever i'm doing to view the
display let alone lift the receiver for more junk.
Unavailable - usually foreign callers who i can only
deal with by email ,so its pointless them phoning me anyway.

That is using the BT FSK toneburst that precedes the
fiirst ring pulses. These units decode the info and display
the caller's telephone number (if not disabled).
I now know I'm being plagued by random tele-sales
calls generated by computer. That is bastard systems dial
out multi-lines by computer and if anyone picks-up the receiver
the system switches to a 'human' bastard for the sales-call.
If these bastards are all tied-up doing their speal then the line
goes dead when i pick it up. A growing problem in the UK
and presuamably elsewhere as well.

I know i will lose a few genuine UK callers ,for
whatever reason have disabled the ident of their phone ,but I consider
retaining my sanity of more importance. I've taken a
spare one of these CLI units apart and there are 36 finger
contacts to the multiplexed LCD display - lower row of 14 large digits
,an upper row of smaller digits for time,incrementing count ,date
and other annotations.
For display -WITHHELD- a uniquely identifying sitiuation is
3rd digit central horiz. bar present and
4th digit absence of top horiz. bar of the alphanumeric letter W
For display -UNAVAILABLE-
1st digit present central horiz. bar is unique

First problem identifying the (pairs/triples ? + BP)
of control lines of the LCD
relating to these 'lit' elements. Dismounting and
putting polaroid/reflector on other side of glass and DC
powering via some 10 Mohm Rs i cannot find pairs of
contcts (via rubber/conductor strip) that only activate
single elements - anyone any ideas how to identify ?
I've tried viewing under a magnifying lamp but confusing.
Second comes XORing or whetever with BP
for a control signal.
The microcontroller is epoxied over so inaccessible.
The final buffering to produce a 2 tone sounder is
the easy bit.

Or does anyone have any other ideas? or more suitable NG ?

e-mail (removing .....) diverse2@tcp.co.u.....k
electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse

Nigel,Diverse Devices,Southampton,England

 

[Lee Blaver]

Nigel Cook wrote:

Starting with a Binatone Clip 100 Caller Line Indicator
I wish to add a home-brew to to indicate when the
caller has "Withheld" his number and the "Unavailable" situation
so i don't even have to break away from whatever i'm doing to view the
display let alone lift the receiver for more junk.
Unavailable - usually foreign callers who i can only
deal with by email ,so its pointless them phoning me anyway.

I was going to try this myself, but gave up and decided it was easier to
pay 3UKP a month to BT for anonymous caller reject

Good luck with the project though, it would obviously work out far
cheaper over time...

Lee


--
To reply use lee.blaver and ntlworld.com

 

[Nigel Cook]

"Lee Blaver" <cybermouse359@yahoo.com> wrote in message
news:bo8vpg$19v9b3$1@ID-169177.news.uni-berlin.de...

Nigel Cook wrote:
Starting with a Binatone Clip 100 Caller Line Indicator
I wish to add a home-brew to to indicate when the
caller has "Withheld" his number and the "Unavailable" situation
so i don't even have to break away from whatever i'm doing to view the
display let alone lift the receiver for more junk.
Unavailable - usually foreign callers who i can only
deal with by email ,so its pointless them phoning me anyway.


I was going to try this myself, but gave up and decided it was easier to
pay 3UKP a month to BT for anonymous caller reject

Good luck with the project though, it would obviously work out far
cheaper over time...

Lee


--
To reply use lee.blaver and ntlworld.com

Perhaps i should make and analyse a few audio
recordings of the FSK. It may be easier ,in the end,to make
a partial FSK decoder. It will also verify
whether the "P-bit" = privacy bit only applies to
the caller to exchange link and not the exchange to
receiver link.

 

[Nigel Cook]

"Nigel Cook" <diverse2@tcp.co.antispam.uk> wrote in message
news:SvadnYunWNX9dzqiRVn-uw@tcp.co.uk...

Starting with a Binatone Clip 100 Caller Line Indicator
I wish to add a home-brew to to indicate when the
caller has "Withheld" his number and the "Unavailable" situation
so i don't even have to break away from whatever i'm doing to view the
display let alone lift the receiver for more junk.
Unavailable - usually foreign callers who i can only
deal with by email ,so its pointless them phoning me anyway.

That is using the BT FSK toneburst that precedes the
fiirst ring pulses. These units decode the info and display
the caller's telephone number (if not disabled).
I now know I'm being plagued by random tele-sales
calls generated by computer. That is bastard systems dial
out multi-lines by computer and if anyone picks-up the receiver
the system switches to a 'human' bastard for the sales-call.
If these bastards are all tied-up doing their speal then the line
goes dead when i pick it up. A growing problem in the UK
and presuamably elsewhere as well.

I know i will lose a few genuine UK callers ,for
whatever reason have disabled the ident of their phone ,but I consider
retaining my sanity of more importance. I've taken a
spare one of these CLI units apart and there are 36 finger
contacts to the multiplexed LCD display - lower row of 14 large digits
,an upper row of smaller digits for time,incrementing count ,date
and other annotations.
For display -WITHHELD- a uniquely identifying sitiuation is
3rd digit central horiz. bar present and
4th digit absence of top horiz. bar of the alphanumeric letter W
For display -UNAVAILABLE-
1st digit present central horiz. bar is unique

First problem identifying the (pairs/triples ? + BP)
of control lines of the LCD
relating to these 'lit' elements. Dismounting and
putting polaroid/reflector on other side of glass and DC
powering via some 10 Mohm Rs i cannot find pairs of
contcts (via rubber/conductor strip) that only activate
single elements - anyone any ideas how to identify ?
I've tried viewing under a magnifying lamp but confusing.
Second comes XORing or whetever with BP
for a control signal.
The microcontroller is epoxied over so inaccessible.
The final buffering to produce a 2 tone sounder is
the easy bit.

update from 04 Nov posting

I found some time to return to this project.
Driving LCD from an af generator about 80Hz and
about 3V pk-pk square wave. Too high a voltage and
extra segments light, too high f and too feint and
too low f then flickers. Also for determination the lines 29 to 36
on the pcb show a different DVM "diode test" value ,
back to the micro ,to
ground, compared to the 1 to 28 lines (LCD disconnected).
The LCD has 8 back-planes,
(numbering on pcb) lines 29 to 36.
33 to 36 relate to the (9 and 2 half) small digits and legends
29 to 32 the 14 large digits
For first 3 large digits and segments a to g (a at top ,then
clockwise) and an extra
double vertical segment (h) giving central segment of W.
( The double segment 5h is angled to give the right hand V
segment of unaVailable and I of wIthheld as not alphanumeric dispaly )
Control 'matrix' (for just lines 1 to 6 and 29 to 32 and digits 1 to 3)
**/1 ,2, 3, 4, 5, 6,
29/1d,1c,2d,2c,3d,3c
30/1e,1h,2e,2h,3e,3h
31/1b,1g,2b,2g,3b,3g
32/1f,1a,2f,2a,3f,3a

lines 7 to 28 for remaining digits 4 to 14

For the UK anyway (digits 1and 2 blank) digit 3 only shows 0 for first digit
of disclosed
numbers so segment 3g off , 3g on only for the first - of "-WITHHELD-" and
first 2 digits blank.
the 1g segment is always off except for the first - of "-UNAVAILABLE-"
As far as i can readup for multiplexed LCDs segments only 'light'
when the timed stepwise voltages between BP and segment
exceed some threshold
folowed by the reverse phase of this voltage.Then relying on
persistence to maintain till the next cycle if still driven.
For all other smaller differences in drive voltages
they stay unlit. To avoid doing timing circuits would it be possible
to construct simple analogue differential amplifier
monitoring lines 31 and 2 for
'unavailable' and 31 and 6 for 'withheld'.?
Just one phase sense ,say BP greater than segment by 2.2V or whatever
(set on test),
and ignore the the reverse phase which is only there to keep
the liquid crystal happy, as far as i know.
Integrated outputs each gating one of 2 tones or patterns on a sounder,
heard between the rings of the phone.

On second thoughts i will choose 4h (pcb lines 30 and 8 ) as
the identifier of the vertical W segment
of WITHHELD (AND the 5h 'I' of 'withheld' ) ,
and 5h ( pcb lines 30 and 10) V of unaVailable
as i seem to remember,very rarely, some displayed
long mobile phone numbers use all 14 digits for the
number of the phone so a 2,3,4,5,6,8 or 9 there would
falsely register as withheld or unavailable

e-mail (removing .....) diverse2@tcp.co.u.....k
electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse

Nigel,Diverse Devices,Southampton,England