Site updates

Recent updates.

Pages that have been added or revised across voicetel.com in the last 90 days, newest first. Dates reflect the most recent commit touching the page or any partial or data file it consumes. Subscribe via the Atom feed.

    • Voice support Configuration guides for routers, IP phones, softphones, SBCs, and open-source PBX platforms used with VoiceTel SIP trunking and voice.
    • Authentication types and DID routing How SIP authentication type and DID routing interact on a VoiceTel trunk — Digest, IP, Lax, Strict, route destinations, and outbound SIP requirements.
    • Inconsistent PBX registration A practical checklist for troubleshooting intermittent PBX registration issues on VoiceTel SIP trunks — credentials, ACLs, profile state, and registration targets.
    • SIP Trunking Configuration and troubleshooting guides for VoiceTel SIP trunks — authentication, DID routing, registration, and supported transports.

    • Home Run your Twilio app on VoiceTel. Compatible voice markup. Compatible webhook signatures. Volume discounts your finance team will notice.

    • Support VoiceTel support: voice / SIP trunking configuration guides for routers, phones, PBXes, and SBCs, plus messaging compliance guides for A2P 10DLC.
    • Opening a support ticket How to open a VoiceTel support ticket that gets understood and resolved fast — best and worst practices for describing a voice or messaging problem.

    • API playground Browser-based playground for the VoiceTel API v2.2. Set your API key once — encrypted to this device — and run live GET requests against api.voicetel.com without leaving the page.
    • 10DLC Campaign Registry playground Browser-based playground for the 10DLC Campaign Registry (TCR / CSP) API at api.voicetel.com/v2/csp. Set your VoiceTel API key once — encrypted to this device — and run live GET requests against the proxy without leaving the page.
    • E911 provisioning How to provision, validate, update, and remove Enhanced 911 (E911) records on VoiceTel numbers using the v2.2 REST API.
    • Provision E911 Guided form to validate an address and provision E911 records on VoiceTel numbers using your API key. Runs entirely in your browser — no data is stored server-side.
    • Documentation VoiceTel documentation for VoiceML, REST APIs, SDK migration, webhooks, SIP trunking, PBX integrations, SDN appliance, messaging, and number workflows.
    • VoiceML SDKs Official VoiceML SDKs for Python, TypeScript, Go, Java, C#, PHP, Ruby, and Swift. All open-source, MIT-licensed, hand-written, targeting VoiceML API v0.6.6.

    • Open Source VoiceTel open-source projects: the voicetel/sdks index of 12 VoiceTel REST API libraries, the voicetel/voiceml-sdks index of 8 VoiceML voice + AMD libraries, VoiceTel Phone cross-platform SIP softphone, memdb in-RAM SQLite with PostgreSQL wire protocol, mod_siprec RFC 7866 recording client for FreeSWITCH, and freeswitch-security event-driven threat detection.

    • VoiceML compatibility matrix A compatibility matrix for VoiceML, covering supported, partial, unsupported, and roadmap voice markup features.

    • API reference VoiceTel REST APIs: VoiceML (Twilio-compatible voice), the consolidated VoiceTel API v2.2, and the 10DLC Campaign Registry. OpenAPI specs rendered with Redoc.
    • VoiceTel SDKs Official VoiceTel SDKs for Python, TypeScript, Go, Java, Kotlin, Scala, PHP, Ruby, C#, Rust, Swift, and Lua. All open-source, MIT-licensed, targeting the VoiceTel REST API v2.2.10.

    • Caller Lookup CNAM and caller-ID lookup services for inbound screening, customer-service display, routing, and fraud controls.
    • Carrier Lookup LRN, MNP, and carrier-of-record lookup services for routing decisions, fraud controls, and rate-deck classification.
    • API v2.1 reference (historical) Per-resource OpenAPI specs for VoiceTel API v2.1. Most endpoints are now consolidated into v2.2 — see the current release for up-to-date documentation.
    • API credentials How to retrieve your VoiceTel API key and authenticate against the v2.2 REST API. v2.2 requires the Bearer authorization header — the JSON-payload apikey field is no longer accepted.

    • Infrastructure & uptime VoiceTel network infrastructure: colocation facilities, cloud regions, carrier handoffs, redundancy, status visibility, and the voice availability target.
    • Hosted PBX Hosted PBX on VoiceTel for extensions, voicemail, ring groups, business hours, attendant menus, SIP devices, and VoiceTel Phone users.
    • VoiceTel Phone VoiceTel Phone provides web, desktop, and mobile VoIP calling backed by VoiceTel SIP credentials with WebRTC media, call history, DTMF, and diagnostics.
    • VoiceTel SDN appliance A small on-prem VoiceTel SDN appliance creates a secure tunnel for SIP traversal through NAT, ALG, UDP timer, and firewall constraints.

    • About VoiceTel is a wholesale telecommunications and CPaaS provider focused on Programmable Voice, Voice Calling, messaging, SIP trunking, numbers, and operator support.
    • VoiceML for developers VoiceTel's XML-based voice runtime for teams that already use voice markup, callbacks, recordings, conferences, queues, and API-driven call flows. Move the economics without rewriting call logic.
    • Wholesale voice for enterprise Origination, termination, Anycast / Geocast / diverse routing, and STIR/SHAKEN — wholesale voice for organizations that care about performance and cost visibility.
    • Frequently asked questions Practical VoiceTel FAQ covering accounts, pricing, voice, messaging, hosted PBX, emergency service, compatibility, and support.
    • Messaging SMS and MMS for application messaging, A2P 10DLC, inbound webhooks, delivery events, and high-volume production workloads.
    • Numbers Local, toll-free, mobile, and ported numbers with E911 provisioning, CNAM, caller-ID services, and VoiceTel product integration.
    • Pricing VoiceTel pricing for voice, messaging, numbers, and lookups. Spreadsheet-style calculator with volume-tier discounts; published list rates appear in your customer portal.
    • SIP Trunking Carrier-grade SIP trunks for PBX, UC, contact center, SBC, Asterisk, FreePBX, FreeSWITCH, and FusionPBX deployments.
    • Network status Current VoiceTel service status for voice, messaging, API, portal, phone apps, SDN appliance connectivity, and support systems.
    • Voice Wholesale Voice Calling with origination, termination, VoiceML call control, STIR/SHAKEN, recordings, conferences, queues, and signed webhooks.
    • VoiceML VoiceML is VoiceTel's XML-based Programmable Voice runtime for compatible call control, signed webhooks, recordings, conferences, queues, and SDK migration paths.
    • VoiceML validator Paste your VoiceML markup and validate it against the verb / noun schema. The validator runs entirely in your browser — nothing is uploaded.

    • For developers VoiceML, Messaging, and Lookups — APIs and runtime built for teams who want production communications workflows without platform markup.
    • Caller and Carrier Lookup for developers CNAM, caller-ID, LRN, and carrier-of-record intelligence — make smarter routing, screening, and rating decisions before a call is answered.
    • Messaging for developers Production SMS and MMS traffic for application workflows — A2P 10DLC support, inbound handling, delivery visibility, and clear rates.
    • API credentials How to retrieve your VoiceTel API key and authenticate against the REST API using either a Bearer header or an apikey field in the JSON payload.
    • For larger organizations Wholesale voice, employee calling apps, white-label opportunities, vendor consolidation, and cost modeling — carrier infrastructure for organizations modernizing branch and enterprise communications.
    • Vendor consolidation and migration for enterprise Consolidate voice, numbers, PBX, SIP, and applications under one operational relationship. Line-item pricing plus cost modeling against actual usage.
    • Employee calling and white-label apps for enterprise One calling experience across web, desktop, and mobile, with private-label opportunities for branded internal communications applications.
    • Hosted PBX and VoiceTel Phone for integrators Multi-tenant Hosted PBX and branded calling apps across web, desktop, and mobile — scale from one office to many customer locations.
    • For integrators and resellers Wholesale SIP trunking, multi-tenant Hosted PBX, and numbers + porting — a telecom platform for partners who own the customer relationship.
    • Numbers and porting for integrators Local DIDs, toll-free, mobile numbers where available, CNAM, e911, and a porting process built around eligibility checks, LOA prep, and rollback planning.
    • SIP trunking and SDN appliance for integrators Carrier SIP trunks for Asterisk, FreePBX, FreeSWITCH, FusionPBX, SBCs, and contact centers — plus the SDN appliance for difficult customer networks.
    • Legal VoiceTel terms and conditions, acceptable use policy, service agreements, privacy policy, billing terms, SLA, and master indemnification.
    • SMS messaging compliance and abuse prevention CTIA, carrier, and FCC messaging standards every VoiceTel messaging customer is required to follow — A2P 10DLC requirements, opt-in, opt-out, prohibited content, and carrier enforcement.
    • Messaging support VoiceTel messaging support — A2P 10DLC campaign registration, vetting standards, sample applications, and common filing mistakes.
    • Voice calling compliance and abuse prevention FCC, TCPA, carrier, and industry anti-abuse standards every VoiceTel voice customer is required to follow — consent, caller ID, STIR/SHAKEN, DNC, and prohibited categories.

    • Contact Contact VoiceTel for sales, support, billing, porting, partnerships, legal, press, and technical integration questions.
    • Get started with business messaging A practical step-by-step guide to adding SMS to your business — strategy, consent, platform selection, message flows, launch, and measurement.
    • Launch & grow Soft-launch with a small audience, measure delivery and conversion, expand responsibly. Includes a message-template library, website-ready signup blocks, and the final pre-launch checklist.
    • Platform & flows Choose a messaging platform, register or verify your sender, build your first message flows, and set up STOP / HELP / preferences plus business-system integrations.
    • Strategy & consent Define your messaging goals, choose a first use case, map the customer journey, separate marketing from transactional messaging, design opt-in, and prepare your website pages.
    • VoiceTel Phone — Desktop clients VoiceTel Phone desktop clients for Windows, macOS, and Linux. Native SIP-over-TLS calling with system audio, call recording, and diagnostics.
    • VoiceTel Phone for Linux — Install Guide & FAQ Download, install, and troubleshoot VoiceTel Phone on Linux (AppImage / .deb / .rpm). Step-by-step setup, SHA-256 checksums, first-launch walkthrough, and FAQ.
    • VoiceTel Phone for macOS — Install Guide & FAQ Download, install, and troubleshoot VoiceTel Phone on macOS (.dmg / .zip) for Apple Silicon and Intel Macs. Step-by-step setup, SHA-256 checksums, and FAQ.
    • VoiceTel Phone for Windows — Install Guide & FAQ Download, install, and troubleshoot VoiceTel Phone on Windows (.exe / .msi). Step-by-step setup, SHA-256 checksums, first-launch walkthrough, and FAQ.
    • VoiceTel Phone — Applications VoiceTel Phone applications for web, desktop (Windows / macOS / Linux), and mobile (iOS / Android). SIP-over-TLS, WebRTC media, Bluetooth audio, NAT-friendly.
    • VoiceTel Phone for Android — Install Guide Install VoiceTel Phone on Android using Developer Options and ADB. Step-by-step install guide for the signed APK from S3.
    • VoiceTel Phone — Mobile clients VoiceTel Phone mobile clients for iPhone and Android. Background calling, Bluetooth audio, adaptive network switching, and SIP-over-TLS security.
    • VoiceTel Phone for iPhone — Install Guide Sideload VoiceTel Phone on iPhone using Developer Mode and Apple Configurator 2 or Xcode. Step-by-step install guide for the signed .ipa from S3.
    • VoiceTel SDN Appliance — Technical Specification Technical specification for the VoiceTel VoIP SDN Appliance: hardware requirements, LAN requirements, installation, image download with MD5 sums, authentication, DID routing, and Asterisk / FreePBX / FreeSWITCH / FusionPBX configuration.
    • Sign up Create a VoiceTel account for voice, messaging, numbers, SIP trunking, VoiceML, hosted PBX, phone apps, and lookup workflows.
    • 10DLC campaign registry vetting guide Pass A2P 10DLC vetting on the first try. Standards from CTIA, GSMA, and The Campaign Registry; filing logic reviewers expect; sample application; common mistakes.
    • Pre-vetting QA worksheet and KPIs Pre-vetting QA worksheet for 10DLC campaign submissions plus suggested KPIs for monitoring SMS program health after launch.
    • Disable SIP ALG on ASUS routers Disable SIP Passthrough on ASUS RT-AX, ZenWiFi, and Nighthawk-class routers so SIP signaling and RTP audio reach VoiceTel uninterrupted.
    • ISP cable, DSL, and fiber gateways Disable SIP ALG on ISP-supplied modems and gateways from Comcast, Spectrum, AT&T, Verizon, Cox, and CenturyLink — bridge mode and per-vendor workarounds.
    • Disable SIP ALG on Fortinet FortiGate Disable the SIP session helper and SIP ALG profile on Fortinet FortiGate so SIP and RTP pass cleanly to VoiceTel.
    • Routers and firewalls Disable SIP ALG and configure NAT correctly on consumer and business routers — ASUS, Netgear, pfSense, FortiGate, UniFi, SonicWall, and more.
    • Disable SIP ALG on Netgear routers Disable the SIP application-level gateway on Netgear Nighthawk, Orbi, and business routers so SIP and RTP traffic passes cleanly to VoiceTel.
    • Configure pfSense for SIP traffic Disable the SIP conntrack helper and configure static-port outbound NAT on pfSense so SIP signaling and RTP reach VoiceTel reliably.
    • Disable SIP transformations on SonicWall Disable SIP transformations and enable consistent NAT on SonicWall TZ and NSA firewalls so SIP and RTP pass cleanly to VoiceTel.
    • Disable SIP ALG on Ubiquiti UniFi Disable conntrack SIP module on UniFi Dream Machine, USG, and Cloud Gateway so SIP and RTP pass cleanly to VoiceTel.
    • Add a VoiceTel SIP trunk to 3CX Configure 3CX SIP trunk to VoiceTel — generic SIP trunk template with Digest or IP authentication, DID routing, outbound rules.
    • Add a VoiceTel SIP trunk to FreePBX Configure a FreePBX (or PBXact) PJSIP trunk to VoiceTel — General, PJSIP Settings, Outbound Routes.
    • Add a VoiceTel SIP gateway to FusionPBX Configure a FusionPBX gateway and outbound route to VoiceTel — Digest or IP authentication, codec negotiation, OPTIONS ping.
    • Open-source PBX platforms SIP trunk configuration for FreePBX, FusionPBX, 3CX, and raw Asterisk PBX deployments connecting to VoiceTel.
    • Configure Avaya J100 series phones for VoiceTel SIP account setup for Avaya J139, J159, J169, J179, J189, and B100 series phones running Open SIP firmware against VoiceTel.
    • Configure Cisco MPP phones for VoiceTel Configure Cisco IP Phone 7800 and 8800 series running Multi-Platform (MPP) firmware to register against VoiceTel SIP trunking.
    • Configure Fanvil IP phones for VoiceTel SIP account setup for Fanvil X-series, V-series, and H-series IP phones, plus Fanvil ATAs and door phones, against VoiceTel.
    • Configure Grandstream IP phones and ATAs for VoiceTel SIP account setup for Grandstream GRP series phones and HT80x analog telephone adapters working with VoiceTel.
    • Hardware IP phones SIP account configuration for Yealink, Poly/Polycom, Cisco MPP, Grandstream, and Snom IP desk phones working with VoiceTel SIP trunking.
    • Configure Mitel 6900 series phones for VoiceTel SIP account setup for Mitel 6920, 6930, 6940, 6970 (formerly Aastra) phones running MiNet/SIP firmware against VoiceTel.
    • Configure Poly Edge series phones for VoiceTel SIP account setup for Poly Edge B10, B20, B30, E300, E350, E400, E450, E550 — Poly's post-VVX desk phone line running Poly OS.
    • Configure Poly / Polycom VVX phones for VoiceTel SIP line configuration for Poly VVX 250, 350, 450, and Edge series phones — Lines tab, transport, NAT keepalive.
    • Configure Sangoma IP phones for VoiceTel SIP account setup for Sangoma S-series and D-series desk phones (S205, S305, S505, S705, D60, D80) working with VoiceTel SIP trunking.
    • Configure Snom IP phones for VoiceTel SIP account setup for Snom D7xx, D8xx, M-series wireless, and meeting devices working with VoiceTel SIP trunking.
    • Configure Yealink IP phones for VoiceTel SIP account setup for Yealink T46U, T48S, T54W, and other T-series desk phones, including NAT keepalive and DTMF settings.
    • Porting numbers Documentation for porting phone numbers to VoiceTel: full procedure walkthrough, and how to retrieve account PINs from major US wireless and landline carriers.
    • Porting procedure: numbers in to VoiceTel How to port phone numbers to VoiceTel: what you'll need, what happens after you submit, common rejection reasons, and FOC timing.
    • Retrieving account PINs for porting (US carriers) How to retrieve or reset the account PIN required to port a US wireless or landline number — Verizon, T-Mobile, AT&T, U.S. Cellular, Xfinity, Comcast, Cox, Frontier — with carrier-specific procedures and support phone numbers.
    • Asterisk SIP trunk to VoiceTel Configure Asterisk PJSIP endpoint, AOR, and identify objects to trunk to VoiceTel — Digest or IP authentication.
    • AudioCodes Mediant SBC trunk to VoiceTel Configure an AudioCodes Mediant SBC SIP trunk to VoiceTel — IP groups, proxy sets, IP profiles, and classification rules.
    • Cisco CUBE SIP trunk to VoiceTel Configure Cisco CUBE on ISR/ASR or CSR1000v as a SIP trunk to VoiceTel — voice service voip, dial-peers, voice class codec.
    • FreeSWITCH SBC trunk to VoiceTel Configure FreeSWITCH as an SBC for VoiceTel SIP trunking — Sofia external profile, gateway, ACL, and dialplan bridging.
    • Session Border Controllers SIP trunk-side configuration for AudioCodes, Cisco CUBE, FreeSWITCH, Asterisk, and other SBCs interconnecting to VoiceTel.
    • Configure Bria for VoiceTel Add a VoiceTel SIP account to Bria Solo, Bria Teams, or Bria Enterprise on Windows, macOS, iOS, or Android.
    • Softphones Configure SIP softphones — Bria, Zoiper, Linphone, MicroSIP — for use with VoiceTel SIP trunking and VoiceTel Phone.
    • Configure Linphone for VoiceTel Add a VoiceTel SIP account to the Linphone open-source softphone on Windows, macOS, Linux, iOS, or Android.
    • Configure MicroSIP for VoiceTel Add a VoiceTel SIP account to MicroSIP, the lightweight open-source Windows softphone built on PJSIP.
    • Configure Zoiper for VoiceTel Add a VoiceTel SIP account to Zoiper 5 on Windows, macOS, Linux, iOS, or Android.
    • VoiceML cost calculator A privacy-preserving calculator for comparing VoiceTel workload costs against source-dated competitor list pricing with line-item assumptions.
    • Migrate from Twilio A practical migration page for compatible Twilio voice applications moving to VoiceTel VoiceML with signed webhooks, SDK host overrides, and line-item pricing math.

    • SMS program readiness checklist Pre-flight checklist for U.S. A2P SMS programs — brand readiness, consent readiness, campaign application readiness, and launch readiness.
    • SMS operating rules Day-to-day operating rules for U.S. A2P SMS programs — consent rules, copy rules, frequency rules, and support rules that keep traffic compliant.
    • SMS application and policy templates Copy-pasteable templates for 10DLC campaign descriptions, opt-in disclosures, STOP/HELP messages, sample messages, and privacy/terms language for SMS programs.
    • Themes every passing SMS program shares Cross-provider themes from CTIA, GSMA, and The Campaign Registry guidance — what every passable A2P SMS program has in common.
    • Get a port-out PIN for a VoiceTel number How to get the port-out PIN for a VoiceTel number you're moving to another carrier. Use the LNP portal at voicetel.com/lnp/, enter the numbers, validate, and click Update Pins.

    • Log in Log in to the VoiceTel portal to manage services, numbers, billing, support tickets, and account settings.