Re: [Linphone-users] Windows Call Quality Window vs iPhones - Further Testing

[Robert Dixon]

Thanks for your reply!

On Oct 24, 2015, at 2:40 PM, Russell Treleaven <address@hidden> wrote:

What version of ios?

7.1.2  That is the latest version available for the Iphone 4.

What version of linphone?

2.3  

What codec are you using?

Whatever is the default.  Should I try something else?

Can you be more specific about the sound quality issues?

The transmitted sound is fine for the first 10 or 15 seconds.  Then it begins to get choppy, and the call quality indicator on the PC or Mac

begins to say things like “very bad”.  The delay time to the other end gets greater and greater, up to 5 or 10 seconds.

After that it is unintelligible at the other end.

This is unique to the Iphone 4 s.  The Iphone 5 s work fine, but they have IOS 9.1 .

Bob

I just tested linphone 2.2.4.2 on ios 8.3 using opus and it sounds great.

General sound quality is great.

Echo cancellation is great.

Noise cancellation is particularly great.

Sincerely,

Russell Treleaven

Sincerely,

Russell Treleaven

On Sat, Oct 24, 2015 at 1:30 PM, Robert Dixon <address@hidden> wrote:

I have confirmed that the same result occurs when using Linphone on a Mac laptop.
Two Iphone4 s do not work and Two Iphone5 s work fine.

I have seen no reply to this problem.

This is a serious problem because I am building a small suitcase that will provide cell phone service to first responders when normal cell service is destroyed in a disaster.  Linphone is the key to all this.  Using 5 Iphones that are stored in the suitcase, they will be able to call out of the area using ham radio mesh technology.  A Ubiquity Bullet wifi access point is connected to another Ubiquity Bullet which has been converted to AREDN mesh radio.  I could afford to buy 4 Iphone 4s, but not 5 Iphone 5s, so the project is completely stalled until this problem can somehow be resolved. Please help!

Dr Robert Dixon


> On Oct 15, 2015, at 8:52 PM, Bob Dixon <address@hidden> wrote:
>
>
> I am trying to call directly from Iphones running Linphone to a Windows PC running Linphone, over a local wireless network.
> If I use an Iphone 5 it works fine.  But if I use an Iphone 4 it does not (Tried with 2 different Iphone 4's.) The wireless signals
> are very strong. The Iphones and the PC and the wireless access point are within a few feet of one another.
>
> On the Windows PC, there is a small window just to the right of the time-in-call window, which seems to be some kind of call
> quality window.  With the Iphone 5, it is nearly full scale. But with the Iphone 4's, it fluctuates between full and zero scale.
> When it is low, the audio quality is bad and it is delayed as long as 5 seconds.
>
> What exactly does that window mean?   Why is there a difference between the different Iphones? How can I fix this
> problem?
>
> Thanks!
>
> Bob


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