• Any member of Voice VPN group may use Short Digit Dial (SDD) code or actual Directory Number (DN) to reach another member of the same group
• All the Voice VPN on-net calls made by the subscriber using the Voice VPN service shall be billed to the corporate and should not be reflected in individual user's phone bill
• OneOffice Duo also provides enterprises with a Self-service portal for administrators to add/delete/modify the members to OneOffice Duo and manage their service profile

You can include the following services under One office Duo(OOD):

• Wireline – Centrex Exchange, PRI, FLP.
• Wireless – CDMA – Mobile, FWP, FWT. GSM (RCOM & RTL networks) – Mobile.