VoIP.ms offers a complete PBX directly in the customer portal at no additional cost. Incoming calls arrive on a DID, pass through your configured routing (eg. an IVR, ring group, queue, time condition, or voicemail) and reach the right device or destination. No server to manage, no software to install.

Prefer to run your own PBX software? See PBXs for third-party options including Asterisk, FreePBX, and 3CX.

• IVR (Digital Receptionist) — Play a menu and route callers to the right destination based on their input.
• Ring Groups — Ring multiple devices simultaneously or in sequence.
• Call Queues — Queue incoming calls and distribute them to available agents.
• Time Conditions — Route calls differently based on time of day or day of week.
• Call Forwarding — Forward a DID to an external number or SIP address.
• Callback — Let callers trigger an outbound call back to themselves through VoIP.ms.
• DISA — PIN-protected inbound dial tone for authorized outbound dialing through your account.
• Announcements — Play a pre-recorded message to callers, then optionally disconnect.

• Subaccounts — Each subaccount is a set of device credentials. Assign an internal extension number to allow devices on the same server to call each other directly.
• SIP URI — Route calls to or from any SIP address without using a traditional phone number.

• Voicemail — Hosted voicemail with voicemail-to-email delivery and optional transcription.
• SMS / Text Messaging — Send and receive SMS and MMS on eligible DIDs.

• Call Recording — Record inbound and/or outbound calls. Recordings are stored in the portal and can be downloaded or emailed.
• Call Detail Records (CDR) — Full call log with filters for date, disposition, type, account, and billing.
• Music on Hold — Upload custom audio for callers on hold or waiting in a queue.
• Call Parking — Park a call and pick it up from another extension.
• Caller ID — Configure the outbound number shown when extensions place calls.
• Emergency Services (eg. 911) — Register a physical address for emergency services on your DIDs.

VoIP.ms supports deployments across multiple sites, offices, or tenants. Each location or client can have its own DIDs, subaccounts, IVRs, voicemail boxes, and call routing — all under a single VoIP.ms account.

• Multi-Tenant Configuration — Set up isolated routing, extensions, and voicemail for separate locations or clients within one account.
• Reseller Program — Sub-reseller accounts, per-client billing, and white-label options for MSPs and service providers.
• VoIP.ms API — Automate provisioning, DID management, and call routing programmatically via the REST API.

• Account Restrictions — Set call duration limits and spending caps, and control international calling access.
• IP Restriction — Lock subaccounts to specific IP addresses to prevent unauthorized registration.
• Caller ID Validation — VoIP.ms enforces NANPA/E.164 standards. Calls with invalid caller IDs are rejected.
• PBX Security Tips — Recommended practices for securing your account and connected systems.
• Two-Factor Authentication (2FA) — Enable 2FA on your portal login.