I just added a third SV8100 to our network(site3).. Already have two others up and running fine at two other sites.

Funny thing with the third is that i am able to 4 digit dial from the new site(site3) to the other two site successfully, but if i try to dial to the new site(3) from old sites(1 and 2) i get a busy signal.

Firewall definately not an issue per site routers do not firewall.. firewall resides at host site.. no ports blocked either per not having this issue between sites 1 and 2

Any help would be appreciated..Thx

Check ARS/LCR on sites 1 and 2. Make sure that the new site's extensions are allowed and are directed to the CCIS route.

I would especially check whichever site is the "hub" site (i.e. 2 calls 1 which relays to three, one is the hub; or 1 calls 2 which relays to three, two is the hub).

What type of network? CCISoIP, K-CCIS or Netlink?