Hello there,

I am writing a simple program (in Java) that must call a pre-defined
number and then do some other things.

According to the manual, I'm using the commands below direct to the
Serial Port under HyperTerminal:

ATZ
OK
AT+FCLASS=8 // go to voice mode
OK
AT+VRA=50 // Ringback-goes-away timer set to 5sec
OK
AT+VRN=10 // Ringback=never-appeared time set to 1sec
OK
ATDT <Number> // Call the number
OK // I got the OK message just after 1sec (or the time
// set in the AT+VRN command) but it appear to simple
// ignore the AT+VRA setting

I was expecting to receive the OK message just after the other side
off-hook the phone, as said in the documentation below:
---
+VRA=m
Ringback-Goes-Away Timer: After originating a call in voice mode, this
command selects the length of time the DCE waits between ringbacks
before the DCE assumes the remote party has gone off hook. After
dialing a phone number and detecting a ringback, the modem sends
<DLE><O> to the DTE if another ringback is not detected within this
timer value. This indicates that the remote telephone has been picked
up (that is, gone off-hook). The ringback-goes-away timer is reset
every time a new ringback is detected.
Range: 0–50 (in 100 ms increments)
0 The DCE returns the ‘OK' code immediately after ringback.
50* (50 = 5.0 seconds)*
---

Am I doing something wrong or even anyone knows a workaround to know
if the other side is BUSY and WHEN the other side pick up the phone?

Any help will be welcome.

Regards,

Tomaz Binsztajn wrote:

Just a guess, but it may be that your AT+VRN=10 setting the never
getting a ringback is way too short. Many times after dialing the first
ringback will not be heard for a few seconds, while the connection is
being established. Try setting that to 5 seconds also, and see what
happens. Also it is recommended to reset modems to Factory default when
initializing them, with AT&F rather than ATZ. Good luck.

--
Art Jackson W4TOY Owensboro, KY USA
Life is God's open book test. In order to pass,
you must open His book to find the answers.

Hi,

First of all, thanks for your help...

I've already thought about it... I tried to put a big range of values
in AT+VRN, from 0 to 255 (the max value).

But my modem always returns OK just after the among of time set in
this command (AT+VRN) as if it never heard the ringback tone.

I'm in Brazil and I tried to call either behind a PBX central and
direct to the phone company.

I'm suspecting that the modem is NOT hearding the ringback tone.

Is it possible?
If YES, is it possible to do a workaround?
If NO, what else?

I discarted physical problem because I've already tried with 2 modems
(of different sources, but with the same Intel 537EP chipset).

Best regards,

Tomaz

Art Jackson <nospam@ringading.buz> wrote in message news:<CJIXc.44287$_h.35630@bignews3.bellsouth.net> ...

Tomaz Binsztajn wrote:

The OK just means that the modem accepted the command. The response to
that command, <DLE><O>, would be what you are looking for. That was
indicated in your original post.

"After dialing a phone number and detecting a ringback, the modem sends
<DLE><O> to the DTE if another ringback is not detected within this
timer value. This indicates that the remote telephone has been picked
up (that is, gone off-hook)."

Try sending all the commands as one string. Copy and paste this into
HyperTerminal, add the number, and see what happens. It could be the
commands you are entering, are timing out before you dial out.
AT&F+FCLASS=8+VRA=50+VRN=50DT <Number>

--
Art Jackson W4TOY Owensboro, KY USA
Life is God's open book test. In order to pass,
you must open His book to find the answers.

The modem does not accpet writing all as a single command (as in you
example).
I have an ERROR response :-(

If I write each command in a different line, the modem never give me
any response... only the OK after the timer set in the AT+VRN
setting...

A friend told me that the common voice modems identifies if the other
side pick up ONLY if the other side is a modem too. But there is
special modems with this "knowledge" that costs about US$200.
Is that true?

Regards,

Art Jackson <nospam@ringading.buz> wrote in message news:<UpRXc.37811$cx.20137@bignews4.bellsouth.net> ...

On 30 Aug 2004 05:42:54 -0700, tomazfb@gmail.com (Tomaz Binsztajn) put
finger to keyboard and composed:

Some commands may need a semicolon to separate them from the following
commands.

Have you checked the AT+VEM command? AT+VEM appears to select those
events which will be monitored by your modem. Perhaps ringback
detection has been disabled.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.

Franc Zabkar <fzabkar@optussnet.com.au> wrote in message news:<8fj9j019bbshdtsdck3tcj6m7scs744vsa@4ax.com>. ..
As I know the use of semicolon do the same than one command per line.
Right?

Yes. I forgot to say... I tried to set AT+VEM=FFFFFFFF (all bits set
to 1) and other configurations to...

With this setting I receive the OK and then a <DLE>b when BUSY (which
helps) but I didn't receive anything about the ringback (when the
other side is ringing and when it picks-up the phone there is no
difference in terminal!)

I'm becaming crazy! :-P

Regards,

Tomaz Binsztajn

On 1 Sep 2004 04:30:43 -0700, tomazfb@gmail.com (Tomaz Binsztajn) put
finger to keyboard and composed:

Is the modem configured for Brazil or USA or some other country? Check
ATI12 or AT+GCI=?


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.

Hi,

Yes. It's configured to Brazil. But I tried a lot of other
configurations too.

But I already solved my problem: my company bought a Hayes Accura V.92
External Modem and it worked as expected (return OK only after the
other side pick up the phone).

Now I'm sure that's a Intel 537EP chipset problem (maybe it does not
work in Brazil or something).


Best regards,

Thanks for your attention,

Tomaz

Franc Zabkar <fzabkar@optussnet.com.au> wrote in message news:<ebacj0h3p8u5tj5gt09cnonfnjm7n0li0q@4ax.com>. ..