Turn it on
{Administrator}=>service system modify name = SNMP_AGENT [state] = enabled [log] = false :service system modify name=SNMP_AGENT state=enabled log=disabled {Administrator}=>
Add a RO community
{Administrator}=>snmp community add securityname = ROCommunity communityname = ****** Please retype communityname for verification. communityname = ****** :snmp community add securityname=ROCommunity communityname=_DEV_E43BC822A4BAE52F {Administrator}[snmp community]=>
Where the asterisks are type your chosen community name.
Once this is done I could access the router using SNMP version 1 and my RO community string.
This information was taken from http://usefulthings.org.uk/2007/01/be-24-meg-thompson-speedtouch-snmp-enable/ with thanks.