3CX Phone System

How to deploy 3CX in Cambodia

• Hardware/Cloud: 4GB RAM, 2 vCPUs — VPS in Singapore or on-premise.
• OS: Debian Linux (recommended) or Windows Server.
• Network: Open ports 5060 (SIP) and 9000–10999 (RTP). Use a static public IP.
• Installation: Boot ISO, set static IP, run Startup Wizard, select Cambodia/ICT timezone, configure FQDN.
• SIP Trunk: Configure inbound/outbound routing with your provider.

3CX vs. traditional PBX

Recommendation: 3CX suits SMEs and enterprises seeking modern UC and remote-work capability.

3CX call center cost in Cambodia

• Free Edition: Up to 10 users, 1-year free license.
• Pro/Enterprise perpetual: $2,000–$5,000 USD one-time, based on concurrent calls.
• Annual SaaS: $200–$800+ USD/year (8–16 SC).
• Additional: SIP trunks ~$5–15/channel/mo, VPS ~$30–100/mo, implementation ~$500–1,500.

SIP trunk configuration

• Choose a provider (Ezecom, Online, Smart, Cellcard, Telnyx, Twilio).
• Set Registrar/Host, authenticate with username/password.
• Create outbound rules (e.g., 0[1-9] for local, 00/+ for international).
• Map inbound DDI numbers to extensions/queues.
• Prioritize G.729 or G.711 codecs.

Call recording & CRM integration

• Recording: Enable in Extensions → Forwarding Rules → Record Calls. Store locally or sync to S3.
• CRM: Settings → CRM Integration — select CRM (Bitrix24, Salesforce, HubSpot), enter API details.

3CX + Bitrix24 integration

1. In Bitrix24 Marketplace, search for 3CX.
2. Enter 3CX PBX IP/FQDN, Auth Port, API Key.
3. Synchronize extensions.
4. Benefits: Click-to-call, automatic call logging, call history in deal cards.

Cloud Infrastructure & Migration

3CX migration (on-premise to cloud)

1. Backup: Full backup via 3CX Console (license, logs, FQDN).
2. Spin up: Deploy new Debian/Ubuntu VM in the cloud (AWS, Cambodian Cloud, VPS).
3. Restore: Use New Server Setup Console to restore from backup.
4. Re-IP & DNS: Update firewall NAT rules and point FQDN to new public IP.
5. Re-provision: Phones and apps auto-provision via central URL.

3CX Cloud vs. on-premise

• Cloud (hosted): Zero hardware maintenance, automatic updates — ideal without on-site IT.
• On-premise: Full data sovereignty, direct PRI/ISDN integration, fixed cost — best for compliance.

VPS hosting vs. cloud server

• VPS: Single physical server partitioned, shared hardware, cost-effective for SMEs.
• Cloud Server: Distributed cluster with SAN/Ceph storage, elastic, 99.99% SLA — mission-critical.

How to choose a cloud server in Cambodia

• Latency: Singapore or Phnom Penh DCs (~5–40ms) for VoIP.
• Data residency: NBC and industry compliance (e.g., Ezecom Cloud).
• Support: 24/7 bilingual (Khmer/English).
• Compute: Prioritize single-thread CPU for real-time audio.
• Cost: Watch bandwidth transit fees.

Cloud migration checklist

• Audit: List all servers, dependencies, endpoints.
• Bandwidth test: Confirm uplink can sustain peak calls.
• Security: Restrict ports, allow SSH/HTTPS only from trusted IPs.
• Backup: Full final snapshot.
• DNS: Reduce TTL to 300 seconds 24h before cutover.
• Rollback: Validated plan to revert if needed.

Proxmox VE vs. VMware vSphere

Cloud backup strategy (3-2-1 rule)

• 3 copies: Keep 3 copies of critical data.
• 2 media: Store on 2 different physical media (local + NAS).
• 1 offsite: At least 1 copy in secure cloud storage (S3, Backblaze, Wasabi).

• Local: Veeam, Acronis, or Proxmox Backup Server.
• Cloud: Sync dumps and recordings to S3.
• Schedule: Full backups weekly, incremental daily.

IT Management & Business Continuity

Managed IT support cost in Cambodia

• Per user/device: $30–$60/month (helpdesk, endpoint, Office 365).
• Per server: $100–$300/month (24/7 monitoring, patching, hypervisor).
• Project/break-fix: $50–$80/hour.
• Cost drivers: Number of branches, network complexity, 24/7 SLA.

IT maintenance checklist for SMEs

Daily/Weekly

• Monitor server health (CPU, RAM, storage).
• Review EDR/anti-virus logs.

Monthly

• Apply security patches (Windows/Linux).
• Audit 3CX call quality (MOS, jitter, packet loss).
• Review firewall logs for unauthorized attempts.

Quarterly

• Test DRP — restore critical VMs in sandbox.
• Test UPS battery runtime and generators.
• Update firmware on switches, APs, routers.

Business disaster recovery planning (DRP)

• Risk assessment: Power outages, flooding, fiber cuts, ransomware.
• BIA: Define downtime tolerance (e.g., 3CX <1 hour).
• Hot site: Fully replicated standby for instant failover.
• Warm site: Pre-configured instance restored from backup — recommended for SMEs.
• Cold site: Physical office with spare phones and alternate ISP.
• Communication runbook: Emergency escalation directory.

Server backup best practices

• Regular restore testing: Quarterly drills to sandbox VMs.
• Encryption: AES-256 at rest, TLS 1.3 in transit.
• Geographic isolation: Secondary backup in an external data centre.

Additional IT Solutions

Beyond 3CX and cloud infrastructure, KHCOLO offers a full suite of enterprise services:

• Professional business email: Alibaba Mail with unlimited storage, calendar sync, advanced spam/phishing defence.
• GSM/VoIP gateways: UC2000-VF 16-channel gateways with VoLTE, hot-swappable SIM, SMS API.
• Enterprise email security: Advanced threat filtering and secure gateway.
• Zimbra email services: Scalable collaboration and messaging for mid-large organisations.
• ESET antivirus: Endpoint protection, threat remediation, ransomware shielding.
• Microsoft 365 solutions: Cloud productivity suites, licensing, identity management.
• CRM applications: Tailored systems with deep 3CX telephony integration and workflow automation.
• Cambodia cPanel hosting: High-speed, secure local web hosting with cPanel.

Conclusion & partnership

Adopting 3CX with resilient cloud infrastructure and proactive IT management gives Cambodian businesses a decisive operational and economic advantage. KHCOLO is your trusted partner in achieving IT excellence.

Contact KHCOLO

We're here to help with your 3CX, cloud, and IT management needs. Reach out today.