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Hi all,

I am attempting to put together a system involving Ser, so that customers can make VoIP calls, and depending on the destination, they get billed.

We would like to be able to cut people off if they run out of credit, so we have decided to use b2bua.

From what I've been reading about this (b2bua working with ser), it would seem that it works.

However, I'm having a few problems, and was kinda hoping someone would be good enough to spare some time to answer my questions.

Currently, what we have is this (in a nutshell):

Softphone <-----> Ser Server (+ developed Plugin) <-----> b2bua <---------> SIP Gateway.

With the flow of call being as follows:

Softphone initiates the call, and passes an INVITE message to the Ser

The Ser does his biz on the message (the config file is available if required), and once all goes well, forwards the message to the b2bua

b2bua does his biz again on the INVITE, and forwards the message to the Sip Gateway.

Sip Gateway connects the call, and call proceeds until someone disconnects.

Call is billed, if it is a PSTN call.

All seems simple so far. However, my main problems are as follows:

1) Sometimes the messages (INVITE, ACK, BYE) seem to get caught in a vicious loop, and won't break out of it, even though the max forward headers is set to 10. I assume this is a bad config file error, and results in this loop. However, I've changed the file so amny times at this point, I'm not exactly sure where the loop is beginning.

2) Sometime when I make a call, the tmie it takes to connect results in the call being disconnected before it connects (or just after). As a result, the destination customer wouldn't humanly have enough time to get to the phone and answer it (unless they had the phone surgically attached to them). I feel that there is a bottleneck/delay somewhere (perhaps related to question 1), and as a result the time to connect is way too long.

Is it a case of I have too many components, and there is a delay, or something similar.

These problems are bad enough when I'm performing single user testing, but when we take on board 20/50/100/500 customers, it's going to become a rather large head-ache :-)

Any help would be most appreciated.

Regards,

Derek