The report that I ended up with in the end was this
SELECT n.sysname, LocalPortNumber, RemoteSystemName, RemotePortId as MAC, RemoteIpAddress, l.nodeid
FROM NodeLldpEntries l, nodes N
where RemoteSystemName like 'LG-E%' and l.nodeid = n.nodeid
order by sysname, localportnumber
Lists all LG-Ericsson IPECS VoIP phones, which switch and port they are on.