[Serusers] no inward calls from PSTN possible

[Gerd Feiner]

Hi,

(sorry for posting this to two different lists, but I think there maybe 
different considerations of this problem)

I have an SER setup with mediaproxy and a Cisco AS5350.  The 
SER/mediaproxy is setup following the guide at www.onsip.org.  The 
AS5350 does just simple mediaconversion (so there are two dial-peers, 
one for PSTN and one for VOIP).  These dialpeers worked fine with a 
less tightened SER-config, but always had the problem of not giving me 
any dialtone.

Now, when I dial inwards from PSTN there is a very short dialtone which 
gets interrupted by silence.  So far so good.  But, when I pick up the 
SIP-phone I get an error-message on my PSTN-phone telling that the 
service was unavailable (yes - I payed my bill :--) and the SIP-phone 
gets disconnected.

When debugging the AS5350 i noticed that is does net get an rport when 
dialing inwards:

voip_rtp_create_session: callID=277, dstCallID=-1 laddr=195.234.128.23, 
lport=18114,raddr=0.0.0.0, rport=0, type=2, sig_tos=3, ip_tos=5

When the SIP-phone is picked up, the AS5350 gets a new information 
regarding the rport:

May  7 15:39:28 195.234.128.23 57384: ^I  State                  : 
STREAM_ADDING (2)
May  7 15:39:28 195.234.128.23 57385: ^I  Callid                 : 277
May  7 15:39:28 195.234.128.23 57386: ^I  Negotiated Codec       : 
g711alaw, bytes :160
May  7 15:39:28 195.234.128.23 57387: ^I  Negotiated DTMF relay  : 
inband-voice
May  7 15:39:28 195.234.128.23 57388: ^I  Negotiated NTE payload : 0
May  7 15:39:28 195.234.128.23 57389: ^I  Negotiated CN payload :  0
May  7 15:39:28 195.234.128.23 57390: ^I  Media Srce Addr/Port   : 
195.234.128.23:18114
May  7 15:39:28 195.234.128.23 57391: ^I  Media Dest Addr/Port   : 
62.141.42.76:16032

but immediately after that the call gets disconnected.

When dialing from SIP to PSTN everything seems fine with the rport:

voip_rtp_create_session: callID=278, dstCallID=279 
laddr=195.234.128.23, lport=17496,raddr=62.141.42.76, rport=16034, 
type=3, sig_tos=3, ip_tos=5

I also noticed that there is a difference in the type-value: 2 when 
dialing inwards and 3 when dialing outwards.

Any ideas why this is happening?

Brgds,
Gerd
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