The cisco vg202xm voice gateways are analog voice gateways for the service provider commercial and enterprise unified communication markets these voice gateways provide voice connectivity to devices such as analog phones fax machines and modems the cisco vg202xm voice gateways provide support for 2 fxs ports and parity with cisco ios faxmodem security and session initiation protocol sip features these voice gateways can be configured with cisco unified communications manager express cucm