APC-1515: Tunneling As Supplementary Service (Siemens)

I have a quick question on the intent of clause 5) of section 9. of APC-1515. It reads as follows: 5) It is the responsibility of the ingress gateway to insure that the tunnel is only sent when the egress gateway has compatible capabilities. (This specifically excludes the use of interworking capable gatekeepers.) Does that parenthesized statement mean that you intend that there be no interworking capable gatekeepers, or does it mean that there can be no such involved in the specified supplementary service? Tom Taylor E-mail: taylor@nortelnetworks.com (internally Tom-PT Taylor) Tel.: +1 613 765 4167 (internally 395-4167) FAX: +1 613 763 7236 (internally 393-7236)