Does shared public fixed user database links work with 9.2.0.8

Hi,
I'm trying to test benefits of using 'shared public fixed user database links' in 9.2.0.8 .
I've monitored tcp/ip communication after creating db link via:
CREATE SHARED PUBLIC DATABASE LINK sales.us.americas.acme_auto.com CONNECT TO scott IDENTIFIED BY tiger AUTHENTICATED BY anupam IDENTIFIED BY bhide USING 'sales';
but as far as I've observed there is new tcp/ip connection made after new user requesting remote table .
So looks like there is 1:1 relationship between user sessions requesting remote table and network connection opened .
Actually there are 2 network connection opened for every session using remote table .
tcp4 0 0 192.15.x.y.44141 192.15.x.y.1521 ESTABLISHED
tcp4 0 1127 192.15.x.y.1521 192.15.x.y.44170 ESTABLISHEDAs of both instances sharing same hardware ,maybe better aproatch would be BEQ communication ?
But I dont see obvious reasons that IPC communication would be better than few connections (because of shared db links) via tcp/ip .
Maybe my understanding of shared db links is wrong but I think that at some point there will be no 1:1 relation between user session requesting remote table
and number of network connection with remote instance . So for exaple with 100 user session I see only 10 network connections .
Regards.
Greg

Thank You, that looks promising .
But could You help with creating test case scenario in which I can clearly see the difference in tcp/ip connection numbers between shared non-shared db links.
Regards.
Greg

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