G'day ! Now we are using SNMP OID .1.3.6.1.4.1.9.10.19.1.1.4.0 for MRTG monitoring of active DS0 channels. It is possible to separate (via SNMP) incoming and outgoing calls , total or per DS1 ? -- Best regards, Andriy A. Yerofyeyev Direct : 1-718-732-3803