Jason Chan (jasonOfficial) wrote:
What's next? Well... thanks to the buggy
firmware and imcompatable standard with Asterisk...
First of all, I can't deny that Planet VIP-450
does a good job in packetizing voice stream, the voice quality is
really good and delay is really small. Also the hardware itself is
quite robust, it seldom halt.. (the machine has been up for a few
days). Also it is quite feature-rich, I can say. BUT I think there is
quite a number of BUGS in the firmware!
In order to see which kind of DTMF Relay it is
using, I have done a packet analysing. When I try to pass SIP INFO type
DTMF band to VIP-450, it replies "501 Unimplemented". Also when I try
to pass DTMF from my POTS phone via the FXO port, only RTP payload can
be seen in the packet captures. I DID suspect that it is RFC2833,
because as far as I know RFC2833 did have the DTMF textx inside the RTP
packet somewhere (seems header). But asterisk just simply did not
regconize them (of coz I have set DTMFmode=rfc2833)! It is pretty
strange that the user manual states "VIP handles DTMF Relay per SIP
specification". So VIP-450 actually is using what kind of SIP
specification?
Sounds familiar.See below.
How about using its Inband DTMF relay? This
will certainly generate strange warning just like my case : improper
ilbc frame size and tell me to use u-law to do DTMF even if I AM using
G.711 u-law. It is seems that the DTMF tone generated by VIP-450
generate is kinda strange...
So the final solution is, SIMPLY SWITCH OFF THE
DTMF RELAY IN VIP-450. Please try to type "show coding" in console mode
and you will see a lot of coding (codec) profiles. Most of them are
with DTMF relay. Just switch off them by "set coding <profile id>
dtmf_relay off" (please check with the manual). If you want to stop
certain codec, just simply make that coding profile unusable in voice.
For example, "set coding <profile id> voice off". If you only
turn on the profile with u-law, the SIP header it issues will just
consist of 0x4 (ulaw) codec, not 0x105.
This is what got my attention.Take a look at the commands that I use
for the Yoda VG-400. If I'm not mistaken, they're exactly the same for
the Planet.Same firmware libraries I presume.
http://lists.digium.com/pipermail/asterisk-users/2005-August/120588.html
If you notice, I also set dtmf_relay off.Too bad you didn't post any
commands earlier, you would have saved a lot of time.
Looks like we should compare notes.
In my point of view, Planet is expecting this
device is connected to another VIP-450, not really for Asterisk or
anything else, even not for a soft phone. Certainly this is not enough
for everyone, at least I can't do any IVR and something what a PBX
should have (just like what I can do in Asterisk). I hope my experience
will help anyone who is using VIP-450 with Asterisk, just like me. I
have done Googling for 3 days but I can search for nothing related to
this issue. Sorry for my poor written English.
Cheers,
Jason Chan, Hong Kong
This is exactly what Yoda wants as well. I remember planning to buy a
Planet unit during my love-hate relationship with Yoda and Asterisk but
I'm now glad I didn't. It seems I would have had to tackle the same
problems. I'm just happy the units I have work well. Thanks to Yoda's
support. They're set on GnuGK rather than Asterisk so it was a first
for me as well as them.
Xie Xie
--
JP Carballo
http://www.netfone2x.com
Bringing the world closer.
It might look like I'm doing nothing, but at the cellular level, I'm really quite busy.
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