AI voice agents for UAE businesses: keep your number and connect your lines

AVA, the voice agent we deliver as Voice as a Service, answers and places calls, uses your business knowledge to handle routine questions, books appointments and transfers the caller to a staff member when a person is needed. Your team keeps extensions, ring groups, business-hours routing and voicemail on the same phone system.

Calls from the SIM pass through a GSM gateway, then an IP PBX, then an encrypted SIP/TLS link to the voice agent. You provide an active SIM with a voice plan that permits gateway use, good signal at the install point, office internet and power. This suits businesses whose customers call a mobile number and branches that want to keep it without moving to a SIP provider.

If your fixed business number is delivered as a SIP trunk from an operator such as etisalat by e& or du, the IP PBX connects to the trunk on one network port and to your office internet on another, then reaches the voice agent over encrypted SIP/TLS. You provide the trunk login or IP allowlist, server addresses, codec (typically G.711 A-law) and number format. A separate session border controller is available for large or high-security deployments.

Copper PSTN lines connect to an FXO gateway, one line per port, then to the IP PBX and the voice agent. A Grandstream HT841 takes 4 lines and an HT881 takes 8. This suits shops and offices that keep a published landline with their current provider and do not want to port the number.

Simultaneous calls are set by the channels you actually have and by your AVA plan, not by spare hardware. On mobile, capacity follows the active cellular voice channels; extra SIM slots alone do not add calls. On SIP, it follows the trunk channels you subscribe to. On analog, each connected line carries one call, and spare gateway ports do not add provider lines. The standard Grandstream UCM6300A IP PBX supports up to 50 concurrent calls and 250 users, with higher-capacity models selected per project.

Every deployment follows the same path, starting small:

All three options need reliable office internet and power at the install point. Plans are sized by monthly hours, minutes and concurrent callers, and quoted after a consultation. For larger organisations, options include multiple or backup trunks, multi-level IVR menus, department routing and greetings by language and time of day.