![]() When the Cisco IOS router or gateway receives a call setup request, a dial peer match is made for the incoming call in order to facilitate routing the call to different session applications. This represents the POTS physical voice port. The ANI is also referred to as Calling Line Identification (CLID). This is a number string that represents the origin and is derived from the ISDN setup message or CAS ANI. This is the call destination dial string and is derived from the ISDN setup message or channel associated signaling (CAS) DNIS. The three call setup elements are: Call Setup Element Note: For outbound dial peers, this command is matched against the called number or DNIS strings. This dial peer command defines the POTS voice port through which calls to this dial peer are placed. When inbound call legs are matched, this command uses the calling number (initial or ANI string) to match the incoming call leg to an inbound dial peer.Ĭalling Number (ANI) for inboundor the Called number (DNIS) strings for outbound Gwy(config-dial-peer)# destination-pattern string When properly configured, this dial peer command uses the calling number to match the incoming call leg to an inbound dial peer. This dial peer command defines the initial calling number or automatic number identification (ANI) string. Gwy(config-dial-peer)# answer-address ANI_string ![]() When properly configured, this dial peer command uses the called number to match the incoming call leg to an inbound dial peer. This dial peer command defines the called number destination or dialed number identification service (DNIS) string. Gwy(config-dial-peer)# incoming called-number DNIS_string The four configurable Cisco IOS dial peer attributes and related call setup elements are shown here: Dial Peer Attribute ![]() Examples of Voice-Network calls legs are Voice over IP (VoIP), Voice over Frame Relay (VoFR), Voice over ATM (VoATM), and Multimedia Mail over IP (MMoIP). Inbound Voice-Network dial peers are associated to incoming Voice-Network call legs of the terminating router or gateway. Inbound POTS dial peers are associated to incoming POTS call legs on the initial router or gateway. Three information elements sent in the call setup message and four configurable dial peer command attributes are used to match dial peers as follows: Matching Inbound Dial Peers Inbound Dial Peers Elements and Attributes ![]() ![]() Refer to Cisco Technical Tips Conventions for more information on document conventions. If your network is live, ensure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. This document is not restricted to specific software and hardware versions. Voice - Understanding Inbound and Outbound Dial Peers on Cisco IOS Platforms Voice - Understanding Dial Peers and Call Legs on Cisco IOS® Platforms Prerequisites RequirementsĬisco recommends that you have knowledge of these topics: This document describes how the inbound and outbound dial peers are matched to traditional telephone services (POTS) and to Voice-Network call legs. ![]()
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