It is wise to install more than 1 kannel ?

[Lucky Lusiano]

Hi All,
Right now I´m using 7 kannel, each kannel handle 1 GSM Modem, total 7 Modem.

1. Is this the right thing to do ?
2. Some time one of my kannel receive waited for bearerbox and the modem
hangs, What happen?

I'm using cvs-20090317

Thank You.