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Label routing can be implemented in any routing script by following these 3 simple steps: 
<pre>Gateway -&gt; Routing Script -&gt; YourScript.rb (Edit)
</pre>
1. Add a the following line on top of your script file: 
<pre>require 'routesets_digit_analyzer'</pre> 
2. Include the module in your routing class: 
<pre>class MyRoutingClass &lt; BaseRouting</pre> 
1. 

<br> '''include RoutesetsDigitAnalyzer''' 

1. 

<br> ... 

1. 

<br> end 

2. Add a before_filter with 'routesets_digit_analyzer' method: 
<pre>before_filter&nbsp;:method =&gt;&nbsp;:routesets_digit_analyzer,&nbsp;:trie_order =&gt;&nbsp;:called</pre> 
=== <br>Complete Example  ===
<pre>require 'base_routing'
require 'routesets_digit_analyzer'

class MyRoutingClass &lt; BaseRouting
include RoutesetsDigitAnalyzer

before_filter&nbsp;:method =&gt;&nbsp;:routesets_digit_analyzer,&nbsp;:trie_order =&gt;&nbsp;:called

route_match&nbsp;:call_field_name =&gt;&nbsp;:called
route_match&nbsp;:call_field_name =&gt;&nbsp;:calling
route_match&nbsp;:call_field_name =&gt;&nbsp;:nap
route_match&nbsp;:method =&gt;&nbsp;:match_nap_availability
route_remap&nbsp;:call_field_name =&gt;&nbsp;:called,&nbsp;:route_field_name =&gt;&nbsp;:remapped_called
route_remap&nbsp;:call_field_name =&gt;&nbsp;:calling,&nbsp;:route_field_name =&gt;&nbsp;:remapped_calling
route_remap&nbsp;:call_field_name =&gt;&nbsp;:nap,&nbsp;:route_field_name =&gt;&nbsp;:remapped_nap
end

</pre> 
<br> 

<br> Note: Other filter scripts can be added to the standard scripts to add flexibility in the routing. <br> 

For example:<br> 

- '''Request-URI routing:''' Will route the call on SIP RURI instead of the to: field<br> 

- '''Modify the Nature of Address:''' We can use this to change the NOA to national or international<br> 

- '''Remove Loop: '''Will prevent calls from being routed back to the sender<br> 

- '''Remove Display IE: '''Removes the DISPLAY Information Element from outgoing ISDN/SS7 calls <br> 

These filters can be merged in the same routing script. Please contact support for more details