write buffer full on chan_ss7

[vallimamod.abdullah@xxxxxxxxxxxx (vallimamod abdullah)]

Hello,

I am using asterisk-1.6 with chan_ss7-1.3 on sangoma cards (a104de.)  
Everything is working fine but I notice many time the following  
message on the logs:

	NOTICE[22852] l4isup.c: Write buffer full on CIC=12 (wrote only 160  
of 240), audio lost (suppress 1).
	NOTICE[21785] l4isup.c: Write buffer full on CIC=12 (wrote only 0 of  
240), audio lost (suppress 133).

Anybody knows what can cause this ?
I think that this impact very badly the sound quality (I have many  
customer complaints...)

Thanks,
- vma
.