Subject: From: Date:

Continuing modem stutter problems Ingo Dean Sat, 20 Feb 1999 16:56:31 -0500

---

I'm still having problems with ECS 4.0 stuttering when playing a
Phone-Recording-C to the modem.

What's odd here is that playing the same Phone-Recording-C file to the
soundcard (Play->VC) sound perfect.  But when I send it to the modem
(Play->HS), it stutters, with the "RD" light on the modem flashing
during every pause.  It plays about 1 1/2 seconds, pauses for 1/10 of a
second or so, plays another 1 1/2 seconds, pauses, etc.  (The pauses are
very short, but long enough to break up the words to where they're not
understandable).  Another way of saying this: If I record a single long
tone using the handset and play it back to the soundcard (play->VC) it
sounds perfect, but if I play it back to the modem (Play->HS) it breaks
it up into multiple 1 1/2 second long tones.

It's a Zoom model 2835 external modem on COM2.  COM2 is setup for 115200
baud, hardware flow control.  The modem is also setup for 115200 baud,
(8N1 parity) with hardware flow control in the Modems control panel.
The FIFO's are both set to maximum.  All on a Pentium 200MMX with an
Asus P55T2P4 motherboard with "2 high-speed UART compatible serial
ports".

It seemed like a flow-control problem, but didn't go away when I made
sure the baud rates were nice and high and it was using hardware flow
control.  I rebooted after every change, and held the shift key down
while logging in to make sure no other programs are running.  But if
it's a flow-control problem, it should also do it when recording from
the voice modem, right?

I've tried every combination of flow-control, baud rates, and FIFO
settings, but nothing makes a difference. Maybe I need a different
modem?

Is anyone else seeing this?  Would you all try to reproduce this and let
me know if it's my system, or if ECS is causing it?  Just create a
Phone-Recording-C item, record a continuous tone into it, and play it
back to both your soundcard and to the handset.

--
Work: mailto:Ingo_Dean@MentorG.com  Personal: mailto:idean@iname.com
              http://www.geocities.com/Hollywood/Hills/2948/

---