Cisco Unified Communications Manager Express System Administrator Guide
Configuring Caller ID Blocking
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Table of Contents

Configuring Caller ID Blocking

Contents

Restrictions for Caller ID Blocking

Information about Caller ID Blocking

Caller ID Blocking on Outbound Calls

How to Configure Caller ID Blocking

SCCP: Blocking Caller ID For All Outbound Calls

Restrictions

SCCP: Blocking Caller ID From a Directory Number

Verifying Caller ID Blocking

Configuration Examples for Caller ID Blocking

Caller ID Blocking Code: Example

SCCP: Caller ID Blocking for Outbound Calls from a Directory Number: Example

Additional References

Related Documents

Technical Assistance

Feature Information for Caller ID Blocking

Configuring Caller ID Blocking

Last Updated: January 3, 2008

 

This chapter describes the Caller ID (CLID) Blocking feature in Cisco Unified Communications Manager Express (Cisco Unified CME).

Finding Feature Information in This Module

Your Cisco Unified CME version may not support all of the features documented in this module. For a list of the versions in which each feature is supported, see the “Feature Information for Caller ID Blocking” section.

Restrictions for Caller ID Blocking

Caller ID blocking on outbound calls does not apply to PSTN calls through foreign exchange office (FXO) ports. Caller ID features on FXO-connected subscriber lines are under the control of the PSTN service provider, who may require you to subscribe to their caller ID blocking service.

Information about Caller ID Blocking

To enable Caller ID Blocking, you should understand the following concept:

Caller ID Blocking on Outbound Calls

Phone users can block caller-ID displays on calls from a particular ephone-dn, or you can selectively choose to block the name or number on outbound calls from a particular dial peer.

The display of caller ID information for outgoing calls from a particular ephone-dn can be blocked on a per-call basis, allowing users to maintain their privacy when necessary. The system administrator defines a code for caller ID blocking in Cisco Unified CME. Users then dial the code before making any call on which they do not want their number displayed on the called-party phone. The caller ID is sent, but its presentation parameter is set to “restricted” so that the caller ID is not displayed.

Blocking CLID displays for local calls from a particular extension tells the far-end gateway device to block display of calling-party information for the calls received from this ephone-dn.

Alternatively, you can allow the local display of CLID information and independently block the CLID name or number on outbound VoIP calls. This configuration has the benefit of allowing caller-ID display for local calls while preventing caller-ID display for external calls going over VoIP. This feature can be used for PSTN calls that go out over ISDN.

How to Configure Caller ID Blocking

This section contains the following tasks:

SCCP: Blocking Caller ID For All Outbound Calls

To block the CLID name or number on outbound VoIP calls from a particular dial peer, perform the following steps.

Restrictions

SUMMARY STEPS

1. enable

2. configure terminal

3. dial-peer voice tag [ pots | voip ]

4. clid strip

5. clid strip name

6. end

DETAILED STEPS

Command or Action
Purpose

Step 1

enable

 

Router> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

 

Router# configure terminal

Enters global configuration mode.

Step 3

dial-peer voice tag [ pots | voip ]

 

Router(config)# dial-peer voice 3 voip

Enters dial-peer configuration mode.

Note You can configure caller-ID blocking on POTS dial peers if the POTS interface is ISDN. This feature is not available on FXO/CAS lines.

Step 4

clid strip

 

Router(config-dial-peer)# clid strip

(Optional) Removes the calling-party number from the CLID information being sent with VoIP calls.

Step 5

clid strip name

 

Router(config-dial-peer)# clid strip name

(Optional) Removes the calling-party name from the CLID information being sent with VoIP calls.

Step 6

end

 

Router(config-dial-peer)# end

Returns to privileged EXEC mode.

SCCP: Blocking Caller ID From a Directory Number

To define a code that phone users can dial to block caller ID display on selected outbound calls from a particular directory number or to block caller ID display on all calls from a directory number, perform the following steps.

SUMMARY STEPS

1. enable

2. configure terminal

3. telephony-service

4. caller-id block code code-string

5. exit

6. ephone-dn dn-tag

7. caller-id block

8. end

DETAILED STEPS

Command or Action
Purpose

Step 1

enable

 

Router> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

 

Router# configure terminal

Enters global configuration mode.

Step 3

telephony-service

 

Router(config)# telephony-service

Enters telephony-service configuration mode.

Step 4

caller-id block code code-string

 

Router(config-telephony)# caller-id block code *1234

(Optional) Defines a code that users can enter before making calls on which the caller ID should not be displayed.

  • code-string —Digit string of up to 16 characters. The first character must be an asterisk (*).

Step 5

exit

 

Router(config-telephony)# exit

Exits telephony-service configuration mode.

Step 6

ephone-dn dn-tag

 

Router(config)# ephone-dn 3

Enters ephone-dn configuration mode.

Step 7

caller-id block

 

Router(config-ephone-dn)# caller-id block

(Optional) Blocks display of caller-ID information for all outbound calls that originate from this dirceory number.

  • This command can also be configured in ephone-dn-template configuration mode and applied to one or more directory number. The ephone-dn configuration has priority over the ephone-dn-template configuration.

Step 8

end

 

Router(config-dial-peer)# end

Returns to privileged EXEC mode.

Verifying Caller ID Blocking


Step 1 Use the show running-config command to display caller ID blocking parameters, which may appear in the telephony-service, ephone-dn, or dial-peer portions of the output.

Router# show running-config

dial-peer voice 450002 voip

translation-profile outgoing 457-456

destination-pattern 457

session target ipv4:10.43.31.81

dtmf-relay h245-alphanumeric

codec g711ulaw

no vad

clid strip

!

telephony-service

fxo hook-flash

load 7960-7940 P00305000600

load 7914 S00103020002

max-ephones 100

max-dn 500

ip source-address 10.115.34.131 port 2000

max-redirect 20

no service directed-pickup

timeouts ringing 10

system message XYZ Company

voicemail 7189

max-conferences 8 gain -6

moh music-on-hold.au

caller-id block code *1234

web admin system name cisco password cisco

dn-webedit

time-webedit

transfer-system full-consult

transfer-pattern 92......

transfer-pattern 91..........

transfer-pattern 93......

transfer-pattern 94......

transfer-pattern 95......

transfer-pattern 96......

transfer-pattern 97......

transfer-pattern 98......

transfer-pattern .T

secondary-dialtone 9

after-hours block pattern 1 91900 7-24

after-hours block pattern 2 9976 7-24

!

create cnf-files version-stamp 7960 Jul 13 2004 03:39:28

!

ephone-dn 2 dual-line

number 126

preference 1

call-forward busy 500

caller-id block


 

Configuration Examples for Caller ID Blocking

This section contains the following examples:

Caller ID Blocking Code: Example

The following example defines a code of *1234 for phone users to enter to block caller ID on their outgoing calls:

telephony-service
caller-id block code *1234

SCCP: Caller ID Blocking for Outbound Calls from a Directory Number: Example

The following example sets CLID blocking for the ephone-dn with tag 3.

ephone-dn 3

number 2345

caller-id block

The following example blocks the display of CLID name and number on VoIP calls but allows CLID display for local calls:

ephone-dn 3

number 2345

dial-peer voice 2 voip

clid strip

clid strip name

Additional References

The following sections provide references related to Cisco Unified CME features.

Technical Assistance

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http://www.cisco.com/techsupport

Feature Information for Caller ID Blocking

Table 1 lists the features in this module and enhancements to the features by version.

To determine the correct Cisco IOS release to support a specific Cisco Unified CME version, see the Cisco Unified CME and Cisco IOS Software Version Compatibility Matrix at http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/requirements/guide/33matrix.htm .

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn . An account on Cisco.com is not required.


Note Table 1 lists the Cisco Unified CME version that introduced support for a given feature. Unless noted otherwise, subsequent versions of Cisco Unified CME software also support that feature.


 

Table 1 Feature Information for Caller ID Blocking

Feature Name
Cisco Unified CME
Version
Feature Information

Caller ID Blocking

3.0

Caller ID blocking per local call was introduced.

1.0

Caller ID blocking for outbound calls was introduced.