Consistent calling across cities requires standards that travel with the site. Governance enforces dial plan structure, routing rules, and policy inheritance, while allowing controlled local exceptions where regulation or business use demands it. Role scopes limit access, templates prevent drift, and reviews keep the number inventory and emergency rules accurate. 

 

Governance toolkit: 

• Global dial plan standards with site codes and extension lengths 
• E.164 normalisation and blocked calling categories 
• Role scopes for location, helpdesk, and device admins 
• Template and tag model for consistent policy rollout 
• Periodic configuration hygiene and drift checks 

Outcome: a consistent calling experience across sites, consistent policy, and new sites brought online in days.