# Editing the route

Routes are used to assign the right trunk group to outgoing calls, thereby specifying the exchange connection.

A route uses the trunk group allocation to determine which network interface is used to route an outgoing call.

Table 1. Route settings
Parameter | Explanation
Route | Route reference number.
Call number / Name | Call number and name of the route.
Max outgoing calls | Restricts the number of calls outgoing simultaneously. No further calls are set up via this route once the set limit is reached. This is signalled to the caller by means of the congestion tone. This allows you to ensure that lines remain free for outgoing/incoming calls. If one of the defined call destinations is busy, the caller obtains the busy signal.
Total B channels | Shows the number of available B channels.
Send access code | Here you can enter a prefix which is added to the call number dialled.
Send delay | Here you can specify how many digits the caller has to have dialled in direct dialling before the call is set up. Applications: The called destination does not support Overlap Dialling and can only evaluate complete call numbers. Line resources are scarce and seizure time should be restricted to a minimum.
External digit barring | The external digit barring allocated to the calling user is activated and prevents the connection from being set up if unauthorised digits are dialled. The digits of the external call number dialled are not verified.
Numbering plan identifier (NPI) | Dial E.164 if the outgoing calls are routed to the public network via this route.
Impulse interval for virtual charges | Lets you set up a virtual charge counter by entering the charge pulse interval for exchange line circuits that do not supply charge information (such as SIP). No virtual call charges are set in the default setting (setting “0”).
Trunk group allocation | Here you can specify which trunk groups are used to route the calls from this route to the network. You can enter several trunk groups. The route attempts to send a call via the first available trunk group.

Parent topic: Outgoing call routing
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