Hi Stuart,
Again thanks very much for the reply.
I apologize if I am source of frustration through not giving enough
information, but I am a simple English teacher trying to find a solution
that my direct tech support seem unwilling or unable to assist with, I am
effectively going over their heads to find a solution. We can speak at
length about irregular past participles, however IPv6/4 is outside of my
wheel house and it could lead to many misunderstandings, so again apologies
in advance.
*Context:*
The company I sub-contract for requires me to make calls from my home
office in Cape Town in South Africa to various mobile and landline numbers
in France, Germany, Switzerland and Spain. To this end they have provided
the Keyyo system which is a French company who offer the KeyyoPhone
application. In the instances where KeyyoPhone cannot be loaded onto a
computer (which appears to be the case for my computer) we are given the
Linphone application to connect using an SIP line that comes from Keyyo.
Here is the number of my line with a few place holders.
sip:***@keyyo.net.
I have been using the Linphone application for 18 months with virtually no
problems up until this month. I really like the Linphone UI and have found
it very light on resources so my ideal preference is managing some kind of
silicon time travel to go back to the good ol' days 3 weeks ago.
On my Macbook I have downloaded and installed the Keyyophone app and it
works well using the same LAN, however this computer is 8 years old and the
'probability of failure' curve gets steeper with use, thus me searching for
a solution to get back to using my primary PC.
I can ask the IT team at my customer to help set up Linphone on my Mac for
testing purposes although my interactions with them have never been as
fruitful as the two emails we have exchanged.
*In Response to questions:*
The echo test is provided by Keyyo and tests the Keyyo line. I guess this
makes it more ambiguous?
I may well be locked into an IPv4 prison although I am pretty sure that I
have a direct connection to the internet. I have attached a screen shot of
my network settings as confirmation. I'm not sure what the limits are in
terms of South African infrastructure, however I have an ADSL line provided
by a telecoms company through a phone line. I get +- 9.8MB/s D/L and a
shameful 0.8MB/s U/L and until fiber rolls out this is the best package
available to me.
If you have other devices with peer to peer capable SIP software on the
same LAN, you can test peer to peer calls using your private IP. E.g. call
sip:***@192.168.1.245 from another SIP capable device if your PC
address is 192.168.1.245. ! That will only work within the LAN, of course.
I did not do this, mostly because I did not
understand. I did however make a call from my mac using Keyyo to Linphone
on my PC (screenshot attached) This worked well. I then made a call from
my PC to my Mac and again the call went well (screen shot attached). I hope
this was not a useless test.
I have also taken a few screen shots of the settings menus in Linphone in
case this provides some more of the information that you need.
I appreciate your time and effort
Regards Grant G
Post by Grant GrieselThanks so much for your reply.
I will be honest, much of what you said required a google but I think I
have understood.
Post by Stuart D. GathmanHave you tried switching services?
I have switched to Skype through my PC and I am able to make calls
without trouble. I have also used a different VOIP system called Keyyo
through an old Macbook using the same internet connection without trouble.
No, you need to try a different SIP service with your failing device to
see whether it is linphone or your service that is failing (you have
already eliminated hardware by trying skype on the same device - although
that is not SIP). For instance, you can register with ekiga.net (if they
are still working), or add your Keyyo account to linphone (assuming Keyyo
is SIP).
Post by Stuart D. GathmanCan you use an echo-test service?
I can use one and have done so without a problem.
Assuming you did the echo-test with linphone, then that indicates that
linphone is not problem. However, if the echo-test was provided by the
same SIP service that is giving you problems, then the result is more
ambiguous.
Post by Stuart D. Gathmanthe intermittent nature of your problem screams to me "NAT firewall
issue".
Post by Stuart D. GathmanI went into my router and found "NAT virtual server set up". There was
a server set up under the name Whatsapp... I removed this and disabled NAT
and I will run a few tests making calls tomorrow to see if there is any
success.
In addition I checked the settings on Linphone and within the "settings"
menu under "network settings" there are four options at the bottom of the
menu page;
'direct connection to the internet'
'Behind NAT/Firewall (specify gateway IP)'
' Behind NAT/Firewall(use STUN to resolve)'
' Behind NAT/Firewall(use ICE)'
Currently " 'direct connection to the internet' is selected and I have
not changed this. Should I change it?
That all depends on whether you have a direct connection to the internet.
:-) Does the IP address of your device look like 192.168.*.* or
172.16.*.* or 10.*.*.* ? If so, then you do not have a direct connection.
You are going to have to provide more details. You should at least let
us know what SIP service you are trying to use.
By "NAT firewall", I mean't an external firewall, like a home router.
Often, these will set up a "session" when you first connect out, that then
times out at an inopportune time. NAT is evil. IPv4 is obsolete for 15
years.
Post by Stuart D. GathmanYou just have to swear off IPv4 just like you have to delete your
Facebook
Post by Stuart D. GathmanIn the same "network settings" section mentioned above there is an
option to tick "Allow IPv6". In the spirit of a process of elimination I
will not select this option until I have tested the effect of changing the
router, but it will be my next port of call.
It will not help you to make calls through a centralized SIP service (like
your are apparently using now). And it will not work at all until you
actually have IPv6.
The purpose of IPv6 is to allow direct peer to peer SIP calls (and emails,
and innumerable other decentralized protocols), with no NAT, so that no
centralized service is needed. &nb! sp;If you have a fixed IPv6 address,
then you can use that like a phonenumber with linphone (assuming parties
you wish to call can also be educated on peer to peer). For instance, if
your login is "griesel" and your IPv6 address is 2001:db8::1234, then you
registering with any service or server. These can be added to the address
book just like ancient phone numbers. (You can alse give names to your
IPv6 via DNS, but that is another topic.) Even if you still need to use a
service to connect to the 100 years obsolete telco system (or prisoners in
IPv4 NAT jail), making peer to peer calls is a valuable test to narrow down
problems. If you have other devices with peer to peer capable SIP software
on the same LAN, you can test peer to peer calls using your private IP.
your PC address is 192.168.1.245. ! That will only work within the LAN,
of course.
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