Back to BlogVoIP Routing

LCR Routing Explained: How to Get Cheapest & Best Quality Routes

LCR (Least Cost Routing) automatically finds the best combination of price and quality for every call. Learn how it works and how to configure it in HexaVoice.

Arjun Mehta
VoIP Solutions Architect
April 8, 20267 min read

What is LCR (Least Cost Routing)?

Least Cost Routing (LCR) is a smart routing strategy that automatically selects the best carrier route for each call based on:

  1. Cost — per-minute rate
  2. Quality — ASR (Answer Seizure Ratio) and ACD (Average Call Duration)
  3. Priority — your manually set preferences

LCR ensures you always get the optimal balance between cost savings and call quality.


How LCR Works at HexaVoice

When you make a call:

  1. Our LCR engine checks all available routes to the destination
  2. It ranks them by your configured criteria (cost, quality, or both)
  3. It selects the best route and attempts the call
  4. If the first route fails, it automatically tries the next best route (failover)

This all happens in milliseconds — callers never experience delays.


Setting Up LCR in Your Dashboard

  1. Log into HexaVoice dashboard
  2. Go to Routes → LCR Settings
  3. Choose your LCR strategy:

- Cost-first: Cheapest route always wins

- Quality-first: Highest ASR route wins

- Balanced: Weighted combination (recommended)

  1. Set minimum ASR threshold (we recommend 85%+)
  2. Set maximum cost per minute for each destination group
  3. Save and activate

LCR Strategies Explained

Cost-First LCR

Selects the cheapest route regardless of quality. Good for bulk, non-time-sensitive traffic.

Quality-First LCR

Selects the route with the highest ASR (answer rate). Best for call centers where answer rates are critical.

Balanced LCR (Recommended)

Assigns a score to each route combining cost and quality. Most businesses do best with this setting.


Monitoring LCR Performance

Check your route performance in Analytics → Route Quality:

  • ASR by destination
  • ACD (Average Call Duration) by route
  • Cost savings vs. fixed routing

Customers using HexaVoice LCR typically save 20-35% on termination costs compared to single-route setups.