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CME Call Blocking [ CORLIST & After Hours ]
CME Call Blocking
Call Blocking Based on Date and Time
There have been many recorded incidents of business phone calls being placed After-hours, when staff has left for the evening. To prevent this you can implement After-hours call blocking on CME.
After-Hours call blocking allows you to define ranges of times specified as After-hours intervals. User has an option to list a number of patterns that are not allowed during those intervals. If any user places a call from a phone registered to CME (SCCP or SIP) during the After-hours time range that matches one of the defined patterns, CME will play a busy tone and disconnect the call.
In addition to phones, the after-hours configuration applies to dial peers (H323, SIP, or POTS). E.g. CUCM connected to VGW using H323 trunk and a call initiated from CUCM phone to PSTN. After inbound dial-peer matches, in case the dialed pattern matches after-hours pattern and after-hours interval is active, the call is blocked.
After-hours exemptions are used to provide exceptions to some users in order to dial during after-hours intervals. After-hours exemption can be applied at DN, Phone (covers all DNs in the phone), templates, global, or Dial-peer.
Another method to achieve exemption is using phone PIN. CME admin can configure PIN per phone which the phone user will use it to login. Once login is successful, the phone will be considered as exempt. To login, the user should navigate to Services Button > MyPhoneApp > After-Hour Login.
Note: PIN exemption is applicable for SCCP phones only
After-hours call blocking has three major steps of configuration
Step1 Define days and/or hours of the day that your company considers off-hours.
Step2 Specify the patterns that you want to bock during the time specified as off-hours.
Step3 Create exemptions to the policy, if needed.
Configuration Commands
telephony-service
after-hours block pattern tag pattern [7-24] !!!… In case 7-24 is applied, this pattern will be blocked 24×7 and exemption won’t be applied to it
after-hours day day start-time stop-time
after-hours date month date start-time stop-time
login [timeout [minutes]] [clear time] !!!… Defines when PIN login will timeout or be rested.
!
dial-peer voice tag {pots | voatm | vofr | voip}
paramspace callsetup after-hours-exempt true !!!… Exempt dial-peer from call-blocking
!
ephone phone-tag
after-hour exempt
!
ephone phone-tag
pin pin-number
!
voice register pool pool-tag
after-hour exempt
!
voice register dn dn-tag
after-hour exempt
Note: Call-blocking exempt is supported only for phones with soft-key display.
Optionally, you can configure after-hours exemption at telephony service, ephone-template, voice register global, or voice register template using the commands
telephony-service
after-hours override-code pattern
!
voice register global
after-hour exempt !!!… In SIP it will override for all patterns.
Class of Restriction (COR)
COR is used to restrict phones calls based on the dialed patterns. How it works?
COR is often described as a lock and key mechanism. Locks are assigned to dial peers/DNs using an outgoing COR lists. Keys are assigned to dial peers/DNs using incoming COR lists. For a call to succeed, the inbound dial peer/DN must have the key for each of the locks that is assigned to the outbound dial peer.
Below is a summary of COR operation.
|
Incoming COR List
|
Outgoing COR List
|
Result
|
|
None
|
None
|
Call succeeds
|
|
None
|
Applied
|
Call succeeds
|
|
Applied
|
None
|
Call succeeds
|
|
Applied
|
Subset of incoming COR list
|
Call succeeds
|
|
Applied
|
Not a subset of incoming COR list
|
Call fails
|
Follow below four steps to implement COR:
- Define COR labels using the dial-peer cor custom name [label] command
- Build the permissions groups using the dial-peer cor list [list-name] member [label]command. A best practice is to assign one member for each outgoing list and multiple members for incoming lists. This will make the operation similar to CSS/Partition concept in CUCM.
- Apply COR lists to the outgoing dial peers/DNs using the corlist outgoing [list-name]command. Only one outgoing COR list is supported per dial peer/DN.
- Apply COR lists to the incoming dial peers/DNs using the corlist incoming [list-name]command.
Example:
dial-peer cor custom
name LABEL1
name LABEL2
name LABEL3
name LABEL4
!
dial-peer cor list 1
member LABEL1
!
dial-peer cor list 2
member LABEL2
!
dial-peer cor list 3
member LABEL3
!
dial-peer cor list 4
member LABEL4
!
dial-peer cor list MANAGERS
member LABEL1
member LABEL2
member LABEL3
member LABEL4
!
dial-peer cor list Employees
member LABEL1
member LABEL4
!
dial-peer cor list Executives
member LABEL1
!
dial-peer cor list App
member LABEL2
member LABEL3
!
dial-peer cor list SD
member LABEL3
!
dial-peer voice 2 voip
corlist outgoing 2
destination-pattern 1001
voice-class h323 100
session target ipv4:200.200.200.200
req-qos guaranteed-delay audio
acc-qos guaranteed-delay audio
codec g711ulaw
!
dial-peer voice 3 voip
corlist outgoing 3
destination-pattern 200.
session protocol sipv2
session target ipv4:150.150.150.150
dtmf-relay sip-notify rtp-nte
!
ephone-dn 1
description Leeds Admin
number 4005
cor incoming Employees
!
ephone-dn 2
description Leeds Manager
number 4010
cor incoming MANAGERS
!
ephone-dn 3
description Leeds Executive
number 4050
cor incoming Executives
!
voice register dn 1
number 971509242497
!
voice register pool 1
id mac 000D.ED22.ED33
type 7960-7940
number 1 dn 1
cor incoming Executives
Inbound & outbound cor lists can be applied simultaneously to same dial-peer/DN.
