[Freeswitch-users] Kudos to the FreSWITCH team!

[peely]

This has a whole lot more to do with interconnect agreements than how many
CAPS one solution can send versus another. Frankly any old piece of SIP gear
has the potential to send more CAPS than your average provider would expect
to receive.

Many telcos, especially tier one's will establish an upper limit on the
number of attempts per second that any interconnect can initiate, for
example BT in the UK limit it to one CAPS per 30 channels approximately.
It's not fair to allow one customer to use the whole available capacity at
the expense of other customers.

We're forever clamping customers because their rubbish dialler software has
no understanding of a 503 with Retry-After response and have gone to lengths
to automate this to protect our network, as even FS can get crippled by a
device which relentlessly initiates call after call (in some cases we've
seen well over 100 CAPS from a single device). So when we detect a killer
trunk we'll raise a critical event in the FS logs and use Fail2Ban to ignore
requests from the customer's IP.





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