[Asterisk-Users] Media Negotiation Failed

[Sebastian Nocetti]

Hi, I have this scenario
 
Cisco 5300 (public ip. 200.47.xx.xx) <---> Asterisk (public ip:
64.76.xx.xx) <--> Cisco 3600 (public ip: 64.76.xx.xx , same network than
* )
 
When a calls comes in Cisco 5300, this send this calls with SIP to *,
asterisk plays a welcome message and resend call to Cisco 3600 that have
4 analog lines connected... but after cisco play welcome message and
when send SIP to 3600, I have this error:
 
v=0
o=root 20045 20045 IN IP4 64.76.xx.xx -> asterisk ip address
s=session
c=IN IP4 64.76.xx.xx -> asterisk ip address.
t=0 0
m=audio 15372 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
 (no NAT) to 64.76.xx.xx:5060 -> 3600 ip address
Sip read: LI>
SIP/2.0 400 Bad Request - 'Media Negotiation Failed'
Via: SIP/2.0/UDP 64.76.xx.xx:5060;branch=z9hG4bK31ba01da -> asterisk ip
address
From: "1143724956" <sip:1143724956 at 64.76.xx.xx>;tag=as33c45436 -> * ip
address
To: <sip:1152672000 at 64.76.xx.xx> -> 3600 ip address
Call-ID: 28b30df021508ba32b21208459e10765 at 64.76.126.30
Warning: 304 64.76.xx.xx:0 "Media Type(s) Unavailable" -> 3600 ip
address
CSeq: 102 INVITE
 
then I have too another GW 5300, with same IOS and same config.. and
with it, all  work OK!!!... I don't understand what is the problem!!...
 
 
IT WORKS OK!!!..
 
Cisco 5300 (public ip. 64.76.xx.xx) <---> Asterisk (public ip:
64.76.xx.xx) <--> Cisco 3600 (public ip: 64.76.xx.xx , same network than
* )
 
 
Some clue?....
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