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Mitel NuPoint Messenger Technical Documentation - Release 7.0

 

RCOSs use NPA/NXX screening to determine which area codes or exchanges to restrict.  The 
abbreviations NPA and NXX are industry terms for the three-digit area code and the three-digit 
prefix (exchange) within an area code, respectively.  NPA/NXX screening is easy for the system 
administrator to configure and is transparent to mailbox owners. 

When a mailbox owner enters a telephone number for any type of outdial, the system checks the 
number against the call screening set in the mailbox’s RCOS.  If the telephone number is not 
restricted, normal processing resumes.  If the telephone number is restricted, the system 
responds “I’m sorry that telephone number is not within your calling area,” then cycles back to 
entering a telephone number. 

RCOS and NPA/NXX screening have these features: 

• 

Outdial limits for message delivery, automatic wakeup, paging notification, call placement, 
and fax delivery 

• 

Multiple screening levels, including 

-  System screening of specific numbers 

- NPA 

screening 

-  NXX (exchange) screening of up to 64 NPAs (area codes) 

You can perform the following procedures with RCOS. These procedures are located in Volume 2 
of this manual. 

Procedure Number 
RCOS and NPA/NXX Usage 

CP 3293 

Assign an RCOS to a Mailbox 

CP 4335 

Configure an RCOS 

CP 3295 

Delete an RCOS 

CP 5406 

Modify NPA/NXX Tables 

CP 4334 

Modify the Absorption Table 

CP 4332 

Modify the Exact Match Table 

CP 4333 

Set RCOS System-Wide Parameters 

CP 5401 

View RCOS Information 

CP 5404 

 

The system capacity is 640 RCOSs. 

You implement screening by creating a Restriction Class of Service (RCOS) and assigning it to 
the mailboxes. The default RCOS is RCOS 1; it is unnamed and allows unrestricted outdial 
capabilities.  The RCOS 1 contents are summarized in Table 8-8.  To implement NPA/NXX call 
screening, you must modify RCOS 1 or configure another RCOS.  RCOS configuration involves 
setting both system-wide parameters and RCOS-specific parameters.  

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