> ## Documentation Index
> Fetch the complete documentation index at: https://doc.khcolo.com/llms.txt
> Use this file to discover all available pages before exploring further.
# How to Choose a Cloud Server in Cambodia — Decision Guide
> Assess latency benchmarks, NBC compliance, bilingual support, VoIP CPU sizing, and bandwidth costs to pick the right cloud server for Cambodia.
Selecting the right cloud server in Cambodia involves more than comparing vCPU counts and RAM on a spec sheet. Network topology, regulatory compliance, support responsiveness, and total cost of ownership all shape whether a platform actually delivers the performance and reliability your business needs. This guide walks you through each decision factor in order of priority so you can confidently shortlist and evaluate providers.
## 1. Latency
Network latency is the single most visible performance variable for real-time applications — particularly VoIP phone systems running on platforms like 3CX. High latency introduces perceptible audio delay, jitter, and call quality degradation that no amount of RAM or CPU can fix.
For VoIP workloads, target a round-trip latency of **under 40 ms** between your cloud server and your primary office. KHCOLO's Singapore data centers (AWS Singapore, Google Cloud) deliver 5–40 ms to Phnom Penh; domestic Phnom Penh DCs typically achieve under 10 ms.
| DC Location | Typical RTT to Phnom Penh | Best Use Case |
| --------------------- | ------------------------- | ------------------------------------------------------------- |
| Phnom Penh (domestic) | \< 10 ms | VoIP, real-time apps, local data residency |
| Singapore (AWS / GCP) | 5 – 40 ms | International connectivity, global SaaS, CDN-facing workloads |
Run a pre-purchase latency test from your office network to the provider's public test endpoint before signing a contract. A short proof-of-concept period is always worth requesting.
## 2. Data Residency and Compliance
Cambodian businesses — especially those in financial services, healthcare, and government — must verify that their cloud provider meets applicable data-residency obligations.
The **National Bank of Cambodia (NBC)** issues directives requiring licensed financial institutions to store certain categories of customer data within Cambodia or in approved jurisdictions. If your business holds a payment, banking, or microfinance license, consult your legal team and confirm your cloud provider's data-residency documentation before provisioning any production workloads.
Key questions to ask your provider:
* In which country are the physical servers located?
* Do you hold any certification relevant to local regulations (ISO 27001, SOC 2)?
* Can you provide a data processing agreement (DPA) that specifies storage jurisdiction?
* Do you support customer-managed encryption keys (CMEK) for data at rest?
Local providers such as **Ezecom Cloud** and KHCOLO's Phnom Penh DC options are positioned to satisfy domestic data-residency requirements that international-only providers cannot meet.
## 3. Technical Support Quality
Downtime at 2 AM on a public holiday is exactly when your support contract is tested. Evaluate your provider's support model before you need it.
KHCOLO provides **24/7 bilingual technical support** in Khmer and English. Having a support team that communicates fluently in your language removes ambiguity during high-pressure incidents and accelerates mean time to resolution (MTTR).
When evaluating support, look for:
* **Response SLA:** What is the guaranteed initial response time for critical (P1) incidents?
* **Language:** Is native-language (Khmer) support available, or is English the only option?
* **Channel:** Phone, ticket, and live chat — or ticket-only with long queues?
* **Escalation path:** Can you reach a senior engineer, or are all contacts first-level?
* **Account manager:** Does your plan include a named technical contact for proactive reviews?
Providers that offer only English-language support or rely on offshore call centers may introduce critical communication delays during a live incident. For mission-critical deployments, verify that a local (Cambodia-based) engineer is reachable at any hour.
## 4. Compute Specifications
Raw resource numbers — vCPUs, RAM, disk size — are easy to compare, but they can be misleading without context.
### CPU: Prioritise Single-Thread Performance for VoIP
3CX and other real-time communication platforms perform audio codec transcoding (G.711, G.729, Opus) on a per-call basis. This work is **single-threaded** — it cannot be parallelised across many cores. A server with 2 high-frequency cores (e.g., 3.5 GHz+) will handle more concurrent calls with lower latency than a server with 8 slow cores at 2.0 GHz.
When sizing a cloud server for 3CX, ask your provider for the **base clock speed and CPU generation** of the physical host, not just the vCPU count. Modern AMD EPYC (Zen 4) and Intel Xeon (Ice Lake/Sapphire Rapids) platforms deliver strong single-thread throughput.
### RAM: Scale With Concurrent Sessions
| Concurrent Calls | Recommended RAM |
| ---------------- | --------------- |
| Up to 25 | 4 GB |
| 26 – 100 | 8 GB |
| 101 – 300 | 16 GB |
| 300+ | 32 GB+ |
### Storage: NVMe SSD for Databases
Call recordings, voicemail, and configuration databases are write-intensive. Choose a plan backed by **NVMe SSD storage** or a high-IOPS SAN tier — spinning disk or low-IOPS SAN will become a bottleneck as your call volume grows.
## 5. Cost Modeling
The advertised monthly price of a cloud server is rarely the true total cost. Model the complete bill before committing.
Always request a **full pricing breakdown** that includes compute, storage, egress bandwidth, snapshot storage, and support tier fees. Providers that appear cheap on compute often recover margin through high bandwidth transit charges.
Costs to itemise:
| Cost Component | What to Check |
| ----------------------------- | ------------------------------------------------------------- |
| **Compute** | vCPU + RAM monthly fee; on-demand vs reserved pricing |
| **Storage** | Per-GB cost; NVMe vs SSD vs HDD tier pricing |
| **Bandwidth / Egress** | Per-GB outbound data transfer fee; included monthly allowance |
| **Snapshot / Backup Storage** | Cost per GB for automated snapshots and backup retention |
| **IP Addresses** | Cost per additional public IPv4 address |
| **Support Tier** | Basic vs priority vs managed support monthly fee |
| **Licensing** | OS licensing (Windows Server), cPanel, Plesk if applicable |
### Cambodia-Specific Bandwidth Consideration
International bandwidth transit in Cambodia is priced differently from Singapore or Western markets. Domestic peering (Phnom Penh DC to Cambodian ISPs) is typically cheaper per GB than international circuits. If your application generates high outbound traffic, a Phnom Penh DC may reduce your bandwidth bill significantly compared to a Singapore-hosted equivalent.
## Decision Summary
| Priority | Factor | Key Signal |
| -------- | -------------- | ---------------------------------------------------------- |
| 1 | Latency | ≤ 40 ms RTT to your office; test before buying |
| 2 | Data Residency | NBC compliance → prefer Phnom Penh DC |
| 3 | Support | 24/7 bilingual Khmer/English; local escalation path |
| 4 | Compute | High single-thread CPU GHz for VoIP; NVMe storage |
| 5 | Cost | Model compute + bandwidth + backups + support holistically |
Once you have shortlisted a provider, review the [Migration Checklist](/cloud/migration-checklist) to plan a safe, structured transition from your existing infrastructure.