[VoIP] 782-37xx 'NNX-Series' Now Active

[john jones]

The 3810 E&M card is also pretty neat.  You have a choice of 2 or 4 wire talk path (with a simple config change!) and a great deal of flexibility with signaling.  Google E&M and you'll find that there are 4 or 5 varieties and the 3810 supports them all.

Steph Kerman helped me to understand how a trunk interface on a TeleNorm PAX system worked and I built and E&M interface/TeleNorm trunk and third version actually worked!

John

----- Original Message ----
From: Spock71 <spock71 at paonline.com>
To: Voice Over IP Tandem for Analog Switches <voip at ckts.info>
Sent: Tuesday, January 29, 2008 7:58:23 PM
Subject: [VoIP] 782-37xx 'NNX-Series' Now Active


After 
alot 
of 
troubleshooting 
and 
aquiring 
assistance 
from 
John 
(actually 
BOTH 
John-s), 
I 
now 
have 
2-way 
connectivity 
on 
CNET.  
My 
many 
thanks 
go 
to 
John 
Novak, 
and 
thanks 
go
to 
John 
Covert 
as 
well 
for 
helping 
isolate 
my 
incoming 
"context/username" 
issue 
with 
the 
iax2.conf 
file.

My 
next 
step 
is 
to 
populate 
some 
of 
my 
numbers 
with 
recorded 
audio 
once 
I 
discover 
how 
to 
easily 
load 
audio 
files 
onto 
Astlinux.
  
Then 
I'll 
look 
into 
FXO 
and/or 
appropriate 
interface 
hardware 
to 
allow 
attachment 
of 
external 
hardware, 
as 
I 
don't 
believe 
standard 
FXO 
boxes 
will 
allow 
me 
to 
interface 
the 
kind 
of 
circuits 
I 
plan 
to 
use 
to 
implement 
my 
"plastic 
intercom" 
interfaces 
to 
Asterisk.  
The 
"dial-window-call-button" 
circuits 
will 
probably 
be 
the 
most 
difficult 
to 
design 
since 
they 
will 
also 
need 
interfacing 
to 
FXO-type 
circuits,but 
I 
suppose 
it'd 
be 
possible 
to 
use 
FXS 
to 
interface 
them 
also 
(but 
then 
there's 
the 
problem 
of 
the 
ring-cycle, 
which 
I 
don't 
want 
on 
my 
Plastic 
system 
-- 
I 
want 
the 
ringing/ringbacktone 
to 
come 
FROM 
that 
Plastic 
system, 
and 
allow 
the 
caller 
to 
use 
DTMF 
directly 
into 
the 
Plastic 
interface, 
and 
use 
the 
'#" 
key 
to 
send 
the 
approx. 
9-volts 
required 
to 
generate 
theringtones 
which 
are 
produced 
inside 
of 
each 
phone 
internally 
both 
for 
ringback-tone 
thru 
the 
line 
at 
reduced 
db 
levels, 
and 
at 
AMPLIFIED 
levels 
out 
thru 
the 
phone's 
external 
mic/speaker).
  
An 
additional 
variable 
tone-oscillator 
will 
be 
added 
to 
give 
the 
simulated 
ring 
effect 
that 
was 
prevalent 
when 
we 
attached 
more-than-one 
phone 
to 
one 
line 
back 
in 
the 
'70's 
and 
early 
'80s; 
the 
effect 
was 
very 
unique 
when 
the 
right 
audio 
freqs. 
were 
combined 
to 
produce 
a 
"warble" 
ring 
effect 
which 
was 
different 
in 
tone/freq.division 
for 
each 
phone 
on 
the 
system; 
some 
sounded 
like 
a 
high-pitch 
tone 
with 
15-Hz. 
ring 
mixed 
in, 
some 
sounded 
like 
a 
30-Hz. 
or 
higher 
ring 
voltage 
with 
a 
500 
or 
600-Hz. 
tone 
mixed, 
and 
some 
were 
simply 
very 
strange 
effects 
WITHOUT 
description.  
I 
believe 
an 
extremely 
low 
minute 
voltage 
was 
placed 
on 
any 
of 
the 
phone's 
lines 
when 
they 
would 
go 
off-hook, 
so 
a 
transistor 
circuit 
would 
be 
needed 
for 
each 
of 
the 
extensions 
on 
the 
Plastic 
system 
to 
act 
as 
a 
line-relay 
of 
sorts.

I 
find 
that 
this 
project 
will 
be 
very 
challenging, 
but 
no 
matter 
how 
long 
it 
takes, 
I 
want 
to 
see 
it 
eventually 
come 
to 
fruition, 
even 
if 
it 
means 
paying 
for 
some 
of 
the 
design 
help, 
as 
my 
knowledge 
of 
transistor 
design 
is 
very 
rusty 
now, 
since 
my 
Electronics 
Tech. 
training 
at 
school 
over 
25 
years 
ago.
In 
the 
meantime, 
I'll 
post 
some 
of 
the 
recordings 
of 
our 
funtimes 
with 
the 
plastic 
phones 
on 
the 
various 
numbers 
in 
my 
pool, 
so 
that 
those 
interested 
can 
get 
some 
idea 
of 
how 
they 
worked 
and 
maybe 
offer 
suggestions, 
(if 
not 
also 
for 
amusement, 
which 
I 
think 
is 
the 
aspect 
of 
the 
recordings 
most 
ppl 
will 
benefit 
from, 
lol).

Meanwhile, 
782-3729 
is 
presently 
active, 
along 
with 
some 
other 
numbers 
for 
the 
standard 
* 
tests.  
I 
will 
update 
my 
directory 
as 
I 
add 
recording 
files 
to 
different 
numbers.

73's
de 
Jeff  
 
(KA3RXE)  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
 
Amateur 
Radio: 
A 
National 
Resource  
  
[http://www.arrl.org]
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