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Stripping digits

suthomas1
Level 6
Level 6

Goodday all,

i am pretty new to voice, hence wanted some answers about how extension numbers & digit strips work. 
why is digit stripping done for calls. If the call is not to an external number & if its to an internal number within the organisation, does it need stripping of digits?will the internal calls work if dialled using the full phone number & without just usung the extension digits?

 

thanks in advance.

 

2 Replies 2

If the call is not to an external number & if its to an internal number within the organisation, does it need stripping of digits?

 

We normaly  don't use digit strip for extensions to extension call, for example user A extension 200 and user b extension 201, in this scenario no need of digit strip. you can dial each other by extensions number.

 

When to use digit strip.

 

Pstn  call

 

Outgoing call

 

For example, assume that you use  access code 9  for outgoing calls. when calling    an 8 digit GSm number(99028165) you will dial 999028165 if you send this number  to ISP, they will reject the call saying invalid number. so in this case you need to strip the access code 9. and send  only the 8 digit GSm number which will be 99028165. 

 

Incoming call.

For  example assume that your  DID is 24586201 and  extensions configured on the phone  is 201.

if ISP send full digit 2458620, your call processing sever will not be able to process it.  because configured extension is 201 and call manger will not know what to do with 2458620. so you need to strip 24586. 

For the same DID and configured extension,  If you receive 3 digit from ISP, called number 201 you don't need to strip. 

 

 

Trunk calls

If Office A   and Office B use same   range  of extension, for example if both office use 2XXX range extensions, we normally add an extra digit before sending the call and strip when receiving. 

 

The use of digit strip depend on the scenario. the above mentioned are just a few informations. these things change with scenarios. 

 

 

Go through below link or google it, there are so many contents available. 

 

https://www.ciscopress.com/articles/article.asp?p=1745737&seqNum=5

 



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TONY SMITH
Spotlight
Spotlight

It would be helpful to know what products and services you are using, is it CME, CUCM or something different?  And are you external calls placed using a SIP service, ISDN or analogue.