My HQ office has site to site vpn established with all our subsidiaries.
Is it possible for the subsidiaries to communicate with each other using the site to site vpn link to HQ without creating another site to site vpn link between subsidiaries? The reason i am asking this is because we have establish an ip phone system where the ip PBX is located in HQ. We deploy some ip phones in the subsidiaries. The ip phone in the subsidiary could call ext no of phones located in HQ and communicate effectively. But when calls are made between 2 subsidiaries, the call could be established but voice could not be heard on both ends. Pls advise. THks in advance.