Re: PTT audio crashing on Mac v.85b1

John Ingham (
Fri, 4 Oct 1996 11:21:53 +0930

Jeff said (in part)...

>Hi all,
> I was wondering if someone could help me out. I've been trying to
>get audio to work using CUSeeMe v.85b1 between two PPC machines.
> The setup
> PowerMac 7500
> 32Meg Ram
> 28.8 modem
> system 7.5.3r2
> CUSeeMe v.85b1
> Video Camera hooked to video in port
> PowerMac 7200
> 24Meg Ram
> 28.8 modem
> system 7.5.2
> CUSeeMe v.85b1
> B/W Quickcam
> Video works okay. I am able to connect to reflectors and see and hear
>everything nicely. I hear audio off the NASA reflector.
> When I hit the PTT my machine hangs consistantly. (I'm on the 7500)
> I had the same problem under .83

I think I have some good news for you Jeff!

Some time ago I created a new thread called "Suspect MacOS 7.5.3 or Open
Transport" in which I stated that I was having trouble running CUSM or
Enhanced CUSM on a PCI Macintosh 7200 running MacOS 7.5.3 and Open
Transport. The symptoms were slowdown of the Graphical User Interface and
total lock-up whenever I tried to speak. In other words, exactly the same
symptoms you report Jeff.

I cured my problem by the upgrading my IP client to FreePPP 2.5v2. I am
now able to run system 7.5.3 and Open Transport and my Graphical User
Interface is responsive and there is no sign of lockup when I speak.

You didn't state your IP client Jeff but I'll bet it's not FreePPP 2.5v2 -
probably a previous version like FreePPP 2.5rf. You can downlown FreePPP
2.5v2 (as I remember it) from

Let's know how you go Jeff.

John Ingham
Supervisor, Technical Operations, CALS (Centre for Applied Learning Systems)
Adelaide Institute of TAFE (Training and Further Education)
GPO Box 1872 Adelaide South Australia 5001
Ph: +61 8 8207 8550 Fax: +61 8 8207 8552
Web Site: