© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Configuring Voice Networks Configuring Dial Peers

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Outline Overview Dial Peers and Call Legs End-to-End Calls Types of Dial Peers Configuring POTS Dial Peers Configuring VoIP Dial Peers Configuring Destination-Pattern Options Default Dial Peer Matching Inbound Dial Peers Matching Outbound Dial Peers Configuring Hunt Groups

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Outline (Cont.) Digit Collection and Consumption Configuring Digit Manipulation Summary Lesson Self-Check

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Dial Peers And Call Legs

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v End-to-End Calls

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Types of Dial Peers A dial peer is an addressable call endpoint. Dial peers establish logical connections, called call legs, to complete an end-to-end call. Cisco voice-enabled routers support two types of dial peers: –POTS dial peers: Connect to a traditional telephony network –VoIP dial peers: Connect over a packet network

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Dial Peer

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v POTS Dial Peers

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Practice Item 1: POTS Dial-Peer Configuration

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v VoIP Dial Peers

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Practice Item 2: VoIP Dial-Peer Configuration

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Common Destination-Pattern Options

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Default Dial Peer 0

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Matching Inbound Dial Peers Configurable parameters used for matching inbound dial peers: incoming called-number –Defines the called number or DNIS string answer-address –Defines the originating calling number or ANI string destination-pattern –Uses the calling number (originating or ANI string) to match the incoming call leg to an inbound dial peer port –Attempts to match the configured dial-peer port to the voice port associated with the incoming call (POTS dial peers only)

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Practice Item 3: Matching Inbound Dial Peers

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Matching Outbound Dial Peers

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Hunt-Group Commands Preference (dial-peer command) –Specifies which dial peers in a hunt group will be used first –Options are 0 through 9, with 0 being most preferred Huntstop (dial-peer command) –Stops dial-peer hunting on the dial peer if it is not matched dial-peer hunt (global command) –Specifies the global hunt-selection order for all hunt groups

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Hunt-Group Configuration

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Practice Item 4: Configuring Hunt Groups

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Digit Consumption and Forwarding POTS dial peers: –By default, the router consumes the left-justified digits that explicitly match the destination pattern and forwards wildcarded digits. –Use the no digit-strip command to disable the automatic digit- stripping function. VoIP dial peers: By default, the router forwards all digits collected.

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Digit Collection Step 1: The router collects digits, one at a time, until it can match an outbound dial peer. Step 2: After a match is made, the router immediately places the call. Step 3: No further digits are collected.

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Digit Manipulation Commands prefix –Dial-peer command –Adds digits to the front of the dial string before it is forwarded to the telephony interface forward-digits –Dial-peer command –Controls the number of digits forwarded to the telephony interface num-exp –Global command –Expands an extension into a full telephone number or replaces one number with another translation-rule –Global and dial-peer command –Digit translation rules used to manipulate the calling number digits, or ANI, or the called number digits, or DNIS, for a voice call

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Practice Item 5: Digit Manipulation

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Summary A call is segmented into call legs with a dial peer associated with each call leg. A call leg is a logical connection between two gateways or routers or between a gateway or router and a telephony endpoint. An end-to-end call comprises four call legs: two from the voice router perspective, and two from the destination router perspective. A dial peer is an addressable endpoint. Cisco voice-enabled routers support POTS dial peers and VoIP dial peers. Basic POTS dial-peer configuration consists of defining the dial peer with a tag number and POTS designation, defining the destination pattern, and defining the voice port to which the device is connected.

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Summary (Cont.) Basic VoIP dial-peer configuration consists of defining the dial peer with a tag number and VoIP designation, defining the destination pattern, and defining the remote voice-enabled router through the session target command. Destination patterns can define specific telephone numbers or use wildcards to define a range of numbers. If no matching inbound dial peer is configured for a call, the default dial peer is used. Inbound dial-peer matching uses the incoming called-number, answer- address, destination-pattern, and portin that orderto match inbound dial peers. Outbound dial-peer matching uses the longest number match in the destination pattern to match an outbound dial peer.

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v Summary (Cont.) Hunt groups are created when more than one dial peer has the same destination pattern but points to a different voice port or session target. –The preference command defines the order in which dial peers are used in a hunt group. –The huntstop command stops hunting at a specific dial peer if that dial peer is not matched. –The dial-peer hunt command defines the hunt behavior for all hunt groups on a device. On POTS dial peers, only wildcard-matched digits are forwarded by default. The prefix and forward-digits commands define how digits are sent out to the voice port. The num-exp and translation-rule commands define how one number is replaced with another number.

© 2006 Cisco Systems, Inc. All rights reserved. CVOICE v