# Plus1CX > Plus1CX delivers 3CX cloud phone systems, contact center tools, AI call analytics, SMS messaging, virtual phone numbers and Plus1CX CRM for US businesses. Everything connects to 3CX or your existing phone system (PBX). Contact: https://plus1cx.com/contact/ ## Pages - [Plus1CX Cloud](https://plus1cx.com/): Plus1CX hosts 3CX in the cloud for US businesses: calls, SMS, email, WhatsApp and web chat in one system, plus AI call analytics, helpdesk, CRM and US numbers. - [Try 3CX free](https://plus1cx.com/free-trial/): Try the 3CX cloud phone system free with Plus1CX: calls, video meetings, website chat, WhatsApp and SMS on Windows, Mac, iPhone, Android and desk phones. - [The history of telephony](https://plus1cx.com/telephony-history/): From Bell's first call in 1876 and manual switchboards to automatic exchanges, digital switching, 2G to 6G, VoIP, cloud PBX and AI-driven communication. - [Plus1CX solutions](https://plus1cx.com/solutions/): Plus1CX add-ons for 3CX or your PBX: missed-call call-backs, SMS, NEXT Call, auto dialer, surveys, AI analytics, helpdesk, Agent Desktop, CRM and API integration. - [Agent Desktop](https://plus1cx.com/agent-desktop/): Calls, email, web chat, SMS, WhatsApp and Messenger in one window with the customer card, Kanban requests, working time, wallboards, NPS and AI analytics. - [AI call analytics](https://plus1cx.com/ai-call-analytics/): Every recorded call becomes a transcript, a summary, a mood score and searchable keywords, attached to the ticket or CRM record. Works with 3CX and other PBX. - [Helpdesk](https://plus1cx.com/helpdesk/): Calls, emails, web chats and SMS become tickets with a status, tag, owner and history on a Kanban board, with auto-replies and reports by topic. Built for 3CX. - [Plus1CX CRM](https://plus1cx.com/crm/): CRM built into your 3CX cloud phone system: companies, contacts, deals, calling from the record, team email, quotes, invoices and an AI summary before every call. - [SMS and messaging](https://plus1cx.com/sms-messaging/): Send single, bulk and automated SMS, WhatsApp and RCS from one platform with templates, scheduling, delivery reports, STOP opt-outs, 3CX integration and REST API. - [Virtual phone numbers](https://plus1cx.com/virtual-phone-numbers/): Local numbers for calls and two-way SMS in the US, Canada and 53 more countries, routed into 3CX, your SIP trunk or a cell phone. Number porting available. - [AI agents](https://plus1cx.com/ai-agents/): AI agents answer inbound calls, make reminder and call-back calls, reply on web chat, WhatsApp and SMS, sort email and hand complex cases to a person with context. - [Automatic call-back after a missed call](https://plus1cx.com/missed-call-callback/): Every missed call is returned automatically as soon as an agent is free, retried if the customer is busy, and reported. Works with 3CX and your existing PBX. - [SMS after a missed call](https://plus1cx.com/sms-after-missed-call/): The customer gets a text within seconds of a missed call and the team is notified in the 3CX chat and queue. Templates, links, replies and reporting included. - [NEXT Call — automatic agent connection](https://plus1cx.com/next-call/): NEXT Call dials customers automatically, plays a short IVR prompt and connects a live agent only when the customer presses 1. Agents talk only to interested people. - [Auto dialer](https://plus1cx.com/auto-dialer/): Power, predictive, progressive and preview dialing from a list with do-not-call filtering, CRM sync of outcomes and campaign reports. Raise outbound productivity. - [Surveys, NPS and CSAT](https://plus1cx.com/surveys-nps-csat/): Ask for a 0–9 rating by automatic call or SMS after service, calculate NPS and CSAT, see the gauge and trend by day, week and month, and turn low scores into tasks. - [API integration](https://plus1cx.com/api-integration/): Start and control calls from your CRM, open the customer card on an incoming call, pass events and recordings, send and receive SMS. HTTPS, JSON, webhooks. - [CRM and ERP integration](https://plus1cx.com/crm-erp-integration/): Connect 3CX to the CRM you already use: customer card on an incoming call, calls logged with recordings, click-to-call. HubSpot, Salesforce, Dynamics, Zoho, Zendesk. - [Contact Plus1CX](https://plus1cx.com/contact/): Book a demo, request a quote in US dollars or ask a technical question about 3CX cloud hosting, contact center, CRM, SMS and numbers. We reply on business days.