Asterisk-output

hi to all i would like to ask…during i monitor my asterisk server on CLI it says that VOIP is to lagged (__ms/__ms) then again it says its reacheable now…then the call quality are compromised- what could be the possible problem with this… and also im using a linux distros for as my gateway server…before my asterisk server…

Internet==>modem==>Linux gateway(centos)==>asterisk server==>client PC…

i had this problem for about a month already…please any comment…form the public. :frowning:

Unreliable or overloaded internet connection.

ok so its with the bandwidth problem? is NAT have great effect also coz im using SIP with softhphones…what could be you best suggestion to this?