This attribute describes the type of the designated port. In MX 3000 only external & internal options are used. All the other options are only for MX 30/300 which need special handling. In order to support interface types in MX 3000, return an ascii string for prtSInterfaceType in this table or support the general RAD value of physicalConnector.

External port - is a port with a physical connector. Internal port - might be of two types: a) A composite port which collects a few external ports data into a common bandwidth (usually routed through DS1 link) b) A port which gets only part of the external ports (usually a few DS0's) The following types are used when all ports are external/ internal and the connector/interface type is necessary (for example, stand-alone units): High Speed port types Low Speed port types Voice port types, CL port types.