VOS3000 Dial Plan: Complete Number Transformation & Prefix Manipulation Guide

VOS3000 dial plan is a powerful feature that enables precise number transformation for routing, billing, and gateway interconnection scenarios. Understanding dial plan syntax and configuration is essential for VoIP operators who need to manipulate called numbers, handle international prefix variations, and ensure seamless interoperability between different networks and devices. This comprehensive guide covers all dial plan capabilities based on official VOS3000 2.1.9.07 documentation.

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🔍 Understanding VOS3000 Dial Plan

The dial plan in VOS3000 provides a flexible mechanism for transforming phone numbers before routing and billing. When a call is processed, VOS3000 can apply dial plan rules to modify the called number (callee) or calling number (caller) based on pattern matching and substitution rules.

📊 Dial Plan Application Points (VOS3000 Dial Plan)

Reference: VOS3000 2.1.9.07 Manual, Section 4.3.1 (Page 219-220)

Application Point	Location	Purpose	Affects
Mapping Gateway Dial Plan	Mapping Gateway > Additional settings	Transform incoming called number	Number before routing decision
Routing Gateway Dial Plan	Routing Gateway > Additional settings	Transform outgoing called number	Number sent to downstream gateway
Phone Dial Plan	Phone Management > Additional settings	Transform called number for phone	Number before routing from phone

📐 Dial Plan Syntax and Wildcards (VOS3000 Dial Plan)

Reference: VOS3000 2.1.9.07 Manual, Section 4.3.1 (Page 219-220)

🔤 Wildcard Characters

VOS3000 dial plan supports wildcard characters for flexible pattern matching:

Wildcard	Name	Matches	Example
*	Asterisk	Any number of any digits (including zero)	* matches any number
?	Question Mark	Single random digit (in target prefix only)	123?78 matches 123178, 123278, etc.
$	Dollar Sign	Keep original digit at position (in target only)	$$$ keeps first three digits unchanged

🔧 Escape Characters for Length Constraints (VOS3000 Dial Plan)

VOS3000 dial plan supports escape characters to specify number length constraints:

Escape Char	Meaning	Syntax	Example
L	Length Less Than	Prefix followed by L and digit count	13L9 matches 11-digit numbers starting with 13
E	Length Equal To	Prefix followed by E and digit count	010E7 matches exactly 10 digits starting with 010
G	Length Greater Than	Prefix followed by G and digit count	010G7 matches 11+ digits starting with 010

Note: Use backslash before escape character (\L, \E, \G) to remove its special meaning and match literally.

📋 Complete Dial Plan Examples from Manual

Reference: VOS3000 2.1.9.07 Manual, Table 4-1 (Page 219-220)

📊 Dial Plan Transformation Table (VOS3000 Dial Plan)

Original Prefix	Target Prefix	Example Input	After Transformation	Description
0	0	02584316146	02584316146	No change – pass through
0	010	02584316146	01084316146	Change prefix 0 to 010
025	(empty)	02584316146	84316146	Remove prefix 025
*	025*	117	025117	Add prefix 025 to all numbers
025*	010	02584316146	01084316146	Change prefix 025 to 010
010*	(empty)	02584316146	01002584316146	Add prefix 010 (empty = append)
*	(empty)	02584316146	(empty)	Delete all numbers
*	12345678	02584316146	12345678	Replace all numbers with constant
025*	8008100-8008121	02584316146	8008100 to 8008121	Range-based random selection
*	12345?78	02584316146	12345178, 12345278, etc.	? becomes random digit
0??8431	8431	02584316146	84316146	? matches any digit in pattern
0134	$$$	0134131	013131	$ keeps original digit position

🔀 Longest Matching Principle

Reference: VOS3000 2.1.9.07 Manual, Section 4.3.1 (Page 220)

When multiple dial plan rules exist, VOS3000 uses the longest matching principle to select which rule to apply. This ensures that more specific patterns take precedence over generic ones.

📊 Longest Matching Examples (VOS3000 Dial Plan)

Dial Plan Rules	Input Number	Matched Rule	Result	Reason
0 → 0 010 → 025	01012345678	010 → 025	02512345678	010 is longer match than 0
* → 025* 01 → 00	0112345678	01 → 00	0012345678	01 is longer match than *
0 → 0 01 → 025 011 → 00	01117654321	011 → 00	0017654321	011 is longest matching prefix

Important: The pattern “*” has the lowest priority and will only be matched when no other pattern matches. This makes it useful as a “default” rule.

🔧 Multiple Substitution Targets (VOS3000 Dial Plan)

VOS3000 dial plan supports multiple substitution targets separated by semicolons (;). When “?” exists in the target, each “?” is replaced by a randomly generated digit.

📋 Multiple Target Examples

Multiple Substitution Target Examples:
======================================

Target: 12345678;8008100-8008121;12345?78

This means randomly choose ONE of:
- 12345678 (constant)
- Any number from 8008100 to 8008121 (range)
- 12345?78 where ? is a random digit (pattern)

Result Examples:
- 12345678
- 8008105
- 8008119
- 12345178
- 12345878

Use Cases:
==========
1. Load balancing across multiple destination numbers
2. A/B testing different routes
3. Redundancy with fallback numbers
4. Random selection for pool allocation

⚙️ Dial Plan Configuration in VOS3000

📍 Configuring Mapping Gateway Dial Plan (VOS3000 Dial Plan)

Reference: VOS3000 2.1.9.07 Manual, Section 2.5.1.1 (Page 28-32)

Step-by-Step Mapping Gateway Dial Plan Configuration:
=====================================================

1. Navigate to:
   Navigation > Operation management > Gateway operation > Routing gateway

2. Right-click gateway and select "Additional settings"

3. Find "Callee number transform" section:
   - Callee number transform: Original prefix → Target prefix
   - Multiple rules separated by comma

4. Example Configuration:
   Original: 00
   Target: (empty)

   Effect: Remove 00 prefix from incoming calls

5. Apply changes and test

Example Scenarios:
==================

Scenario 1: International calls coming with 00 prefix
Need to route to gateway expecting numbers without 00
Solution: Original: 00, Target: (leave empty)

Scenario 2: Local calls coming without area code
Need to add area code for routing
Solution: Original: *, Target: 025* (adds 025 prefix to all)

Scenario 3: Convert mobile prefix
Solution: Original: 013, Target: 8613 (convert Chinese mobile format)

📍 Configuring Routing Gateway Dial Plan

Reference: VOS3000 2.1.9.07 Manual, Section 2.5.1.1 (Page 32-39)

Setting	Location	Purpose
Callee number transform	Routing Gateway > Additional settings > Dial plan	Transform called number before sending to this gateway
Caller number transform	Routing Gateway > Additional settings > Dial plan	Transform calling number before sending to this gateway
Gateway prefix	Routing Gateway > Main settings	Add prefix for routing to this gateway

🎯 Common Dial Plan Use Cases

🌐 International Prefix Handling

Scenario	Original	Target	Example
Remove 00 international prefix	00	(empty)	004412345678 → 4412345678
Add 00 international prefix	*	00*	4412345678 → 004412345678
Convert + to 00	+	00	+4412345678 → 004412345678
Add country code	*	86*	13812345678 → 8613812345678

📞 Area Code Manipulation

Scenario	Original	Target	Example
Add area code to local numbers	E8	025*	84316146 → 02584316146
Remove area code	025	(empty)	02584316146 → 84316146
Change area code	025	010	02584316146 → 01084316146

🚨 Emergency Number Routing

Emergency Number Dial Plan Examples:
====================================

Scenario: Route emergency numbers to specific gateway

1. Emergency 911/112 routing:
   Create routing gateway with prefix: 911,112
   Dial plan on mapping gateway:
   - Original: 911, Target: (empty - pass through)
   - Original: 112, Target: 911 (convert 112 to 911)

2. Police emergency:
   Original: 110
   Target: (empty or specific routing number)

3. Ambulance/Medical:
   Original: 120
   Target: (routing destination)

Important Notes:
================
- Emergency numbers should have highest priority
- Use specific prefixes (not wildcards) for emergency routing
- Test thoroughly before production deployment

🔍 Troubleshooting Dial Plan Issues

🚨 Common Problems and Solutions

Problem	Possible Cause	Solution
Number not matching expected rule	Longer pattern exists and takes precedence	Review all dial plan rules, use longest matching principle
Prefix not removed	Original prefix doesn’t match exactly	Verify exact prefix in CDR, adjust dial plan
Wrong transformation applied	Multiple rules with overlapping patterns	Check longest matching, reorder if needed
Billing discrepancy	Dial plan changes number after billing lookup	Verify dial plan application point (before/after billing)
Number becomes empty	Target prefix is empty for full match	Use correct wildcard patterns, avoid deleting entire number

📋 Dial Plan Testing Procedure

Dial Plan Testing Steps:
========================

1. Enable Debug Trace:
   System > Debug trace > Check "On"

2. Make Test Call:
   Place call with number to test

3. View Call Analysis:
   CDR > Right-click failed call > Call analysis

4. Check Number Transformation:
   - Look for "called number" before and after transformation
   - Verify correct dial plan was applied

5. Check CDR:
   - Verify "callee billing" shows correct number
   - Compare with "callee access" for incoming number

6. Adjust if needed:
   - Modify dial plan rules
   - Re-test with new configuration

🔗 Related Resources (VOS3000 Dial Plan)

• 📖 VOS3000 Callee Rewrite Rule and Prefix Conversion
• 📖 VOS3000 Prefix Settings Guide
• 📖 VOS3000 Call Routing Guide
• 📖 SIP Trunking with VOS3000
• 📖 VOS3000 Downloads

❓ Frequently Asked Questions

What happens when multiple dial plan rules match?

VOS3000 applies the longest matching principle. The dial plan rule with the longest matching prefix is selected. For example, if you have rules for “0” and “010”, the number “01012345678” will match “010” because it’s longer. The “*” wildcard has the lowest priority.

Can I use dial plan to change caller ID?

Yes, VOS3000 supports caller number transformation in routing gateway settings. Configure “Caller number transform” in the routing gateway’s additional settings to modify the calling party number before sending to the downstream gateway.

How do I test if my dial plan is working correctly?

Enable debug trace in VOS3000, make a test call, then check the CDR and call analysis. The call analysis will show the number before and after transformation, confirming which dial plan rule was applied.

Can dial plan affect billing?

Yes, dial plan can affect billing if applied before the rate lookup. Mapping gateway dial plan transforms numbers before billing, while routing gateway dial plan transforms numbers after billing. Consider this when designing your number transformation strategy.

What’s the difference between gateway prefix and dial plan?

Gateway prefix is used for routing decisions – it determines which gateway handles the call. Dial plan transforms the actual number. Gateway prefix matching happens first for route selection, then dial plan transforms the number for the selected gateway.

📞 Get Expert Help with VOS3000 Dial Plan

Need assistance with complex dial plan configurations? Our VOS3000 experts can help you design and implement number transformation strategies for any VoIP scenario.

📱 WhatsApp: +8801911119966

Contact us for VOS3000 installation, dial plan configuration, gateway setup, and professional VoIP support services!

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