SNMP OID IP/Interface Information

I understand PepLink has custom MIBs but a standard location (1.3.6.1.2.1.4) should provide Interface/IP information. When I do a SNMP walk at the location I get 0 results. My Networking monitoring provider is saying that PepLink should be providing data at that OID as an industry standard. Does anyone know of how I can get my IP information to show at that OID location.

Yes I do have the PepLink MIBs and yes I know the locations, but my monitoring service is persistent on the 1.3.6.1.2.1.4 location. More information about this location can be found here: RFC 1213: Management Information Base for Network Management of TCP/IP-based internets: MIB-II