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Wolfgang S. Rupprecht
Guest
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 Posted:
Tue Oct 11, 2005 1:28 am Post subject:
half-duplex talk path? |
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Has anyone else noticed that sometimes the talk path is half duplex?
One of the uses here was complaining that the other side didn't appear
to hear her, assumed it was a prank call and hung up. She called back
a few minutes later and things were fine.
-wolfgang
--
Wolfgang S. Rupprecht http://www.wsrcc.com/wolfgang/ |
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Cocoamum
Guest
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| Posted:
Tue Oct 11, 2005 1:43 am Post subject:
Re: half-duplex talk path? |
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Wolfgang S. Rupprecht skrev:
| Quote: | Has anyone else noticed that sometimes the talk path is half duplex?
One of the uses here was complaining that the other side didn't appear
to hear her, assumed it was a prank call and hung up. She called back
a few minutes later and things were fine.
-wolfgang
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Yes - yes - yes.
I thought it was always like that and that you had to learn to live with it.
Tine |
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Ivor Jones
Guest
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| Posted:
Tue Oct 11, 2005 2:37 am Post subject:
Re: half-duplex talk path? |
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"Wolfgang S. Rupprecht"
<wolfgang+gnus20051010T132417@dailyplanet.dontspam.wsrcc.com>
wrote in message news:8764s5nmkn.fsf@bonnet.wsrcc.com
| Quote: | Has anyone else noticed that sometimes the talk path is
half duplex? One of the uses here was complaining that
the other side didn't appear to hear her, assumed it was
a prank call and hung up. She called back a few minutes
later and things were fine.
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On what system..? It would help if we knew what network and equipment you
are referring to.
Ivor |
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Wolfgang S. Rupprecht
Guest
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| Posted:
Tue Oct 11, 2005 7:20 am Post subject:
Re: half-duplex talk path? |
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"Ivor Jones" <ivor@despammed.invalid> writes:
| Quote: | "Wolfgang S. Rupprecht"
wolfgang+gnus20051010T132417@dailyplanet.dontspam.wsrcc.com
wrote in message news:8764s5nmkn.fsf@bonnet.wsrcc.com
Has anyone else noticed that sometimes the talk path is
half duplex? One of the uses here was complaining that
the other side didn't appear to hear her, assumed it was
a prank call and hung up. She called back a few minutes
later and things were fine.
On what system..? It would help if we knew what network and equipment you
are referring to.
|
I was trying to get a feel for how common half-duplex talk paths were
and perhaps have someone propose a model for why they would happen.
Embarrassing the SIP gatewaying service I was using wasn't my
intention. Leaving out voip service provider names, the talk path
looks like this:
grandstream_budgetone -> asterisk_current -> VOIP_service_provider
All devices have routable IP addresses and asterisk is setup to use
"can-reinvite" to short-circuit the RTP path, allowing both RTP
endpoints to talk to each other directly.
-wolfgang |
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Wolfgang S. Rupprecht
Guest
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| Posted:
Tue Oct 11, 2005 7:28 am Post subject:
Re: half-duplex talk path? |
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Cocoamum <ta@uu.dk> writes:
| Quote: | Wolfgang S. Rupprecht skrev:
Has anyone else noticed that sometimes the talk path is half duplex?
One of the uses here was complaining that the other side didn't appear
to hear her, assumed it was a prank call and hung up. She called back
a few minutes later and things were fine.
-wolfgang
Yes - yes - yes.
I thought it was always like that and that you had to learn to live with it.
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Thanks! I wasn't sure how common this was. I hadn't heard it
mentioned yet.
Seems like this has the potential to really annoy the people being
called.
-wolfgang |
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Cocoamum
Guest
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| Posted:
Tue Oct 11, 2005 1:39 pm Post subject:
Re: half-duplex talk path? |
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Ivor Jones skrev:
| Quote: | "Wolfgang S. Rupprecht"
wolfgang+gnus20051010T132417@dailyplanet.dontspam.wsrcc.com
wrote in message news:8764s5nmkn.fsf@bonnet.wsrcc.com
Has anyone else noticed that sometimes the talk path is
half duplex? One of the uses here was complaining that
the other side didn't appear to hear her, assumed it was
a prank call and hung up. She called back a few minutes
later and things were fine.
On what system..? It would help if we knew what network and equipment you
are referring to.
Ivor
|
I'm not very experienced in this. I just downloaded SKYPE, put on a
headset, paid 10 euro, and started to talk.
I have an ADSL line with 256/256 speed.
Is this officially a "talk path" or am I answering the wrong thread?
Tine, Denmark |
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Cocoamum
Guest
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| Posted:
Wed Oct 12, 2005 4:20 pm Post subject:
Re: half-duplex talk path? |
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ukcats4218016@yahoo.com skrev:
[quote]I've never come across any VoIP providers that aren't full duplex. Are
there really providers like this?
[/quote]
In may case it turned out it was my sound board and I didn't know. I
bought a skype telephone and don't have a problem anymore.
Tine |
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Guest
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| Posted:
Wed Oct 12, 2005 4:20 pm Post subject:
Re: half-duplex talk path? |
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I've never come across any VoIP providers that aren't full duplex. Are
there really providers like this? |
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Wolfgang S. Rupprecht
Guest
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| Posted:
Wed Oct 12, 2005 9:30 pm Post subject:
Re: half-duplex talk path? |
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ukcats4218016@yahoo.com writes:
[quote]I've never come across any VoIP providers that aren't full duplex. Are
there really providers like this?
[/quote]
They are only half-duplex when things are going badly. A second call
a few minutes later might work fine.
A second observation is that sometimes the talk path is just slow to
open. One can hear the other side, but it takes 5-10 seconds or so
for the other side to start to hear you. Often the other side has
decided it is a prank phone call and hung up, so it isn't clear if the
bad calls would have eventually started working.
-wolfgang |
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Wolfgang S. Rupprecht
Guest
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| Posted:
Wed Oct 12, 2005 9:34 pm Post subject:
Re: half-duplex talk path? |
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Cocoamum <ta@uu.dk> writes:
[quote]I have an ADSL line with 256/256 speed.
Is this officially a "talk path" or am I answering the wrong thread?
[/quote]
A "talk path" comes from old telephone jargon where one has two pairs
of wires used to carry the conversation, one in each direction. Each
direction is a "talk path". If one pair is broken one party can hear
the other, but the other can't hear the first. With careful software
design, this "feature" now appears to be available for VOIP too. ;-)
-wolfgang |
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