We need to deploy Cisco IPT in Manila. But they're using E1 R2 for DID (incoming) trunks and analog CO for outgoing trunks. Can anyone share the vg configuration as we know this vg should be h323 config? Would you please also suggest which IOS is better work for E1 R2? The vg we use is C2851 and our CCM is 4.1(3) SR3a.