Hiding the Caller’s Number from Employees

In some cases, employees should not see the actual phone number of a client. Here is a possible approach to solving this problem: employees will be provided with an alternative number that they can use to call back.

1. Go to System → System File Customization.

"System file customization" section

2. Open the modules.conf configuration file for editing. Set the mode to "Add to end of file".

"Add to end of file" mode

3. Connect the module to calculate the hash sum:

load => func_md5.so

4. Open the extensions.conf configuration file for editing. Set the mode to "Add to end of file".

"Add to end of file" mode

5. Define the context for number substitution:

[dial_create_chan-custom]
exten => s,1,NoOp()
    ; Only for incoming calls
    same => n,ExecIf($["${CHANNEL(channeltype)}" == "Local" || "${FROM_DID}x" == "x"]?return)
    ; No processing required if an internal number is calling
    same => n,ExecIf(${DIALPLAN_EXISTS(internal,${CONNECTEDLINE(num)},1)}?return)
    ; No processing required if the number is not in the list
    same => n,ExecIf($[${DIALPLAN_EXISTS(bluring-extensions,${CHANNEL(endpoint)},1)} == 0]?return)
    ; Retrieve the cached number
    same => n,Set(blNumber=${CONNECTEDLINE(num):-4}*${MD5(${CONNECTEDLINE(num)})})
    same => n,Set(DB(bluring/${blNumber})=${CONNECTEDLINE(num)})
    ; Replace the caller ID
    same => n,Set(CONNECTEDLINE(num)=${blNumber})
    same => n,Set(CONNECTEDLINE(name)=${blNumber})
	same => n,return

6. Describe the context with the numbers for which you need to replace the number:

[bluring-extensions]
; Allow number substitution for extension 201
exten => 201,1,NoOp()
; Allow substitution for all four-digit extensions
exten => _XXXX,1,NoOp()

7. We will provide the opportunity to call back to a replacement number:

[all_peers](+)
exten => _XXXX*.,1,Set(number=${DB(bluring/${EXTEN})})
    same => n,ExecIf($["${number}x" == "x"]?hangup)
    same => n,Goto(all_peers,${number},1)