In order to dial emergency services, please configure the following settings:

• Login to the system administration
• Navigate to 'Settings->Servers->Edit'
• Click on 'Emergency Services'
• Add emergency services numbers
• Navigate to 'Trunks' and edit a trunk you wish to use as an emergency trunk
• Set 'Emergency Trunk' = 'yes'
• Save settings

Any emergency number that is dialed will go over the set trunk.