# FaxCore Evolution eV6 — Complete System Reference

> Comprehensive system, architectural, administrative, and developer reference for FaxCore Evolution eV6 enterprise fax server.

## Overview
FaxCore Evolution eV6 is a centralized, high-volume enterprise document delivery and Fax-over-IP (FoIP) server platform designed for high availability, multi-tenant deployment, virtualization, cloud, and on-premises environments.

- Headquarters: FaxCore, Inc. | 19590 East Main Street, Suite 207, Parker, CO 80138, USA
- Documentation: https://faxcore.com/docs
- Support Portal: https://support.faxcore.com
- Main Website: https://faxcore.com
- About FaxCore: https://faxcore.com/about/

## Key Modules & Capabilities

### 1. Multi-Tenant Architecture & Domain Hierarchy
FaxCore eV6 models multi-tenancy as an Active Directory-style forest and tree structure. The root `SYSTEM` domain anchors the installation. Child domains can be provisioned for business units, divisions, branch offices, or distinct client companies. Permissions and configurations follow a strict hierarchical precedence:
1. User Level (Highest precedence, direct overrides)
2. Domain Level (Middle precedence, inherited policies)
3. Server / Global Level (System-wide baseline)

### 2. Line Interfaces & FoIP Support
- Enghouse Brooktrout SR140 FoIP (SIP / T.38 and G.711 pass-through)
- TE-SYSTEMS XCAPI FoIP middleware (SIP / H.323)
- etherFAX Cloud Integration (Hybrid cloud FoIP without local SIP trunks)

### 3. Authentication & User Provisioning
- Local native user accounts with configurable password complexity
- Active Directory / LDAP synchronization with scheduled polling and group mapping
- SAML 2.0 Single Sign-On (SSO) with Microsoft Entra ID (Azure AD), Okta, Ping Identity, and ADFS
- Self-Service User Onboarding with cryptographically signed, expiring URL tokens
- CSV Bulk Import and Export utility

### 4. Integration Gateways & Protocols
- SMTP Relay with pre-configured templates for Microsoft 365, Google Workspace, SendGrid, Amazon SES, Mailgun, and custom MTAs
- Email-to-Fax and Fax-to-Email bidirectional routing
- Native SMTP Listener Service (`FXC6.SMTPListenerAgent`): Standalone Topshelf Windows service replacing deprecated IIS 6.0 SMTP; provides multi-port listening (25/587/465), TLS 1.2/1.3 encryption, Windows Certificate Store binding (`certlm.msc`), envelope domain whitelisting, and automated SPF/DKIM validation.
- File Gateways: Hot folder / drop directory monitoring with XML and control file specifications
- Print-to-Fax and Network Printer capture
- Webhooks for real-time status notifications to third-party endpoints

### 5. Routing Engine
- Inbound: Direct Inward Dialing (DID/DNIS), Caller ID (CSID/ANI), Port-based, OCR text recognition, Barcode recognition, Domain-level fallbacks, and Unrouted Fax queues
- Outbound: Least Cost Routing (LCR), Area Code / Country Code rules, Carrier rate prioritization, and automatic failover groups

### 6. High Availability & Resilience
- Active-Active multi-server clustering
- Microsoft SQL Server AlwaysOn Availability Groups
- Centralized network storage (UNC / SAN / NAS / DFS) with volume failover
- Automated database purging and regulatory archival retention

### 7. REST API & Developer Integration
- OpenAPI 3.0 REST API at `https://faxcore.com/docs/api/`
- Full endpoint coverage: Auth, Messages, Users, Domains, CoverPages, Gateways, Logs, and Reports
- Bearer token authentication and role-scoped permissions