hello,
i have tried with a friend
recently, im unsure if it's the proper place to talk about it, but it's
one of the rare forums with a category focused about SIP/VoIP.
here it is :
gigaset c530ip, i guess it's among the most solt model from the last decade, from that manufacturer.
on
frenchy telcos forums, several nerds also have it, so i guess that
device is pretty well know. What is highly less known, is the
gigaset.net voip network offered by the manufacturer. I was thinking it
was running about xmpp protocol. Looks like it's sip only. Well, it
started like :
1. i tried to see if it was usable, alive, for a
several yrs old device. So i looked into the phone's system, and saw a
kind of directory, really difficult to use nowadays, regarding our
smartphone's new features : it's both slow and limited in entry's public
directory. well, half-public : browse it requires to get a gigaset voip
professional phone.
2. when i discovered that "worldwide"
directory, i tried to "call" like that, registred accounts. Uh: all
were busy/unactive, no one seems available. From family-like accounts,
to SMB or others usages, hundred of "sip account" are still registred,
and listed.
3. well, after few months of little investigation,
with a friend whom gets a such similar phone, we tried to see if it was a
out of order network, or just a dormant one with thousand of forgotten
accounts. we were then surprised to see that the network was working
well, able to get a (unsecured) sip/voip communication.
4. thus,
device looks like to get released in retail too early to support s/zrtp.
however, even if between both same models, from two different cities,
with two different internet access, the communication was working, but
from another type of phone/service, it's not at all : i tried from both
linphone/ippi software/services. Each time, the gigaset rings, shows the
incoming call alert, but even when pushing the green button to hang up,
isnt able to start a new communication : it's blocked on the gigast
device, while the other (not gigaset, linphone) phone says its entered
in communication, with no sound at all, for a while (about a minute)
before the communication gets stopped.
qusetion is : how could it
be fixed? anyone get success to call a sip gigaset device on
gigaset.net network, with a working communication?
here are various logs we went about to retrieve from a friends (from linphone app or device's base with tcpdump) are here :
https://e.pcloud.link/publink/show?code=kZaqksZwM00MtijVWhqlGajWiyL7RWmDwg7