I'm testing this feature with these scenarios:
7960 + CUVA / 7985 > CCM 5.1.3 > ISR GW 2811 (12.4(20)T) + VIC2-2BRI > ISDN > Polycom ViewStation SP384
7960 + CUVA / 7985 > CCM 5.1.3 > ISR GW 2811 (12.4(20)T) + VIC2-2BRI > ISDN > IPVC GW 3527 (v5.5) > GK > Polycom VSX7000
Both the 2811 and the Polycom has 1 BRI connected. The 3527 has 1 PRI.
The only "successful" call is from the 7960+CUVA vs the Polycom VS, using G.711 A law and H.263. The problem is that I have experience is one-way audio. I don't why we can't connect to the 3527.
Do you have tested it? Can we change opinions?
Thanks and regards!