[Asterisk-Users] Grandstream Handytone 286 RTP Problems - FIXED

[Mike Machado]

For the benefit of the archives, here is what I did to fix the problem:

Simply reordering

allow=ilbc
allow=ulaw

to 

allow=ulaw
allow=ilbc

in sip.conf

Fixed the problem. I guess the Handytone is not that graceful in codec
negotiation?

I did notice * sends RTP packets with payload type 97, which ethereal
says is an unknown type. * also sends the payload 97 to sipura, but
after a few packets, it starts to send ones with payload type 97, which
ethereal identifies as "ITU-T G.711 PCMU", maybe after it notices sipura
is sending them payload type 0 packets. In the case of handytone,
handytone sends NO RTP packets to *, so maybe it does not get the clue.



On Sun, 2004-01-04 at 20:16, Mike Machado wrote:
> I am trying to get the handytone 286 to make a very simple call to * and
> having problems. It registers with * just fine, but when I place a call
> (to echo test, for example), the RTP stream seems to have problems
> opening. Here is there error I get in *:
> 
> WARNING[98311]: File chan_sip.c, Line 464 (retrans_pkt): Maximum retries
> exceeded on call 20d1c411-e210-5f3d-3f88-19035c8fcb26 at 192.168.2.6 for
> seqno 0 (Response)
> 
> When doing traces with ethereal, I see successful SIP and SDP
> handshakes, but when * sends handytone RTP packets, I see a ICMP Port
> Unreachable messages sent from Handytone to * regarding the UDP RTP
> packet. * then gives up and I see a BYE from *, which handytone acks.
> 
> Handytone config is default except obvious SIP registration parameters.
> I also have a Sipura SPA2000 and everything works perfect for that one,
> same extension and everything (not at same time of course).
> 
> sip.conf entry:
> 
> disallow=all                    ; Disallow all codecs
> allow=ilbc
> allow=ulaw                      ; Allow codecs in order of preference
> 
> [131]
> type=friend
> host=dynamic
> reinvite=no
> canreinvite=no
> qualify=300
> callerid="handytone <131>"
> mailbox=131
> nat=0
> 
> 
> Handytone info:
> 
> Software Version:    Program--1.0.4.17    Bootloader--1.0.0.11
> HTML--1.0.0.19
> 
> 
> Both on same subnet, no NAT. I have two Handytones, both exhibit same
> symptoms. 
> 
> Anyone else have this problem?
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