ASP Capabilities value 0x2 of interworking field

Hello Folks,

Section "3.10.9.  ASP Capabilities" of SUA RFC allows to specify the
capability of ASP/IPSP.

Could you please clarify value 0x2 of "Signalling Gateway".
In my view this value should not be possible for IPSP nor for ASP,
thus it is never visible in SUA protocol. Why should it be defined as
possible value then?


Does it make sence to have an endpoint and Relay collocated in an
IPSP, then interworking field has to combine 0x3 and 0x1 values?


Thank you in advance

Ilie