Blocking Incoming Calls by Caller ID

[rtsoi]

Is there a way to block a caller ID from reaching any of our DIDs?

I know how to do it via VRT to an individual extn.

 

[jimbojimbo]

Many ways. Easy way is to setup a station with ec500 on a COR that can't dial any other COR and assign the calling party number in the off premise station mapping so the PBX thinks the inbound caller is this station.

 

[ZeroZeroOne]

There is a little trick you can use with EC500.

The following pieces have been programmed in the PBXs:

COR 666:

display cor 666                                                 Page   1 of  23
                              CLASS OF RESTRICTION
 
               COR Number: 666
          COR Description: Blocked
 
                      FRL: 0                                APLT? y
  Can Be Service Observed? n           Calling Party Restriction: origination
Can Be A Service Observer? n            Called Party Restriction: none
        Time of Day Chart: 1       Forced Entry of Account Codes? n
         Priority Queuing? n                Direct Agent Calling? n
     Restriction Override: none       Facility Access Trunk Test? n
     Restricted Call List? n                 Can Change Coverage? n
 
            Access to MCT? y            Fully Restricted Service? n
Group II Category For MFC: 7            Hear VDN of Origin Annc.? y
         Send ANI for MFE? n             Add/Remove Agent Skills? n
            MF ANI Prefix:              Automatic Charge Display? n
Hear System Music on Hold? y   PASTE (Display PBX Data on Phone)? n
                        Can Be Picked Up By Directed Call Pickup? n
                                    Can Use Directed Call Pickup? n
                                    Group Controlled Restriction: inactive

Station 946666 has been set up with COR 666

display station 946666                                          Page   1 of   4
                                     STATION
 
Extension: 946666                        Lock Messages? n               BCC: 0
     Type: 9630                          Security Code: *                TN: 1
     Port: S11254                      Coverage Path 1:                 COR: 666
     Name: Inbound Call Blocking       Coverage Path 2:                 COS: 1
                                       Hunt-to Station:
STATION OPTIONS
                                           Time of Day Lock Table:
              Loss Group: 19         Personalized Ringing Pattern: 1
                                                 Message Lamp Ext: 946666
            Speakerphone: 1-way               Mute Button Enabled? y
        Display Language: english
 Survivable GK Node Name:
          Survivable COR: internal              Media Complex Ext:
   Survivable Trunk Dest? y                          IP SoftPhone? n

Off-PBX-Telephone configuration-set 6

display off-pbx-telephone configuration-set 6
 
 
 
                                  CONFIGURATION SET: 6
 
                      Configuration Set Description: Blocked
                               Calling Number Style: network
                                CDR for Origination: phone-number
                 CDR for Calls to EC500 Destination? n
                        Fast Connect on Origination? n
                       Post Connect Dialing Options: out-of-band
                      Cellular Voice Mail Detection: none
                                      Barge-in Tone? y
                        Calling Number Verification? y
          Call Appearance Selection for Origination: primary-first
                                   Confirmed Answer? n

To add numbers to the blocking use change off-pbx-telephone station-mapping 946666

On page 1, enter a new line with the following information:

change off-pbx-telephone station-mapping 16666                  Page   1 of   2
                  STATIONS WITH OFF-PBX TELEPHONE INTEGRATION
 
 Station        Application Dial   CC  Phone Number      Trunk       Config
 Extension                  Prefix                       Selection   Set
 946666            EC500         -     ##########         ars        6
                                 -
                                 -
                                 -

Where ########## = the number to be blocked.

On page 2, a new line is automatically created:

change off-pbx-telephone station-mapping 16666                  Page   1 of   2
                  STATIONS WITH OFF-PBX TELEPHONE INTEGRATION

 Station       Call       Mapping      Calls       Bridged        Location
 Extension     Limit      Mode         Allowed     Calls
 16666          2       both           all         both

Change the fields to the following:

change off-pbx-telephone station-mapping 16666                  Page   2 of   2
                  STATIONS WITH OFF-PBX TELEPHONE INTEGRATION
 
 Station       Call       Mapping      Calls       Bridged        Location
 Extension     Limit      Mode         Allowed     Calls
 946666         2       origination    none        none

Save. All calls from the entered number will be blocked. Be sure not to change any existing information.
Limitations:
Each extension requires one user license, reducing the total number of available stations.
Up to six (6) numbers can be programmed per extension.

 

[rtsoi]

Can you use an XMobile license or it has to be a station license?

 

[biglebowski]

Do the calls come in via an SBC?

 

[avayaguy23]

I used to block callers through a vdn/vector. The first line of every vector i had it linking to another vector that checked to see if the ani was in the block list. It was clunky but worked.

 

[dagwoodsystems]

Note that you should be able to have up to four entries in the off-pbx-telephone station-mapping record. So there's a small amount of economy there. You'll have to build a new record for the next four and so on. I used this technique for a long time at a hospital and also began to get irritated that my resources were getting eaten up. My rule was to give the oldest entries six months and then remove them. By then the spoofers will be tumbling/spoofing different CID.

Tim Alberstein

 

[ZeroZeroOne]

rtsoi - I believe it has to be a station license but it's been a while.

biglebowski - I assumed OP (rtsoi) didn't have SIP but yes, Adaptation Entries would also work well for blocking unwanted calls from either specific or a range of numbers.

avayaguy23 - The advantage of using EC500 over Vector steps is that the system checks every incoming call to every station, not just ones that hit the VDNs.

dagwoodsystems - Yes, four (4) entries per station in EC500. Not sure where I got the number 6 from. Still, your rule is almost exactly what I practiced: I had three extensions set aside for blocking and would rotate out the oldest spammers. I also had a CDR and would run a report to find instances of when a single number dialed in to multiple DIDs. You could see them dial in every 20 to 30 seconds right down the number line: xxx-1001, xxx-1002... Sometimes users alerted me, sometimes the spammers called me, too!

 

[avayaguy23]

ZeroZ3roOne. EC500 also requires station licenses. Its a very expensive way to manage blocked calls.

 

[Arlo555]

Have you considered setting up a blacklist in your Session Manager SIP firewall?

 

[rtsoi]

No SIP, calls come in via PRI.