Troubleshooting Cisco CallManager, Network Signaling and Dial Plan © 2004 Cisco Systems, Inc. All rights reserved. IPTT v Troubleshooting CallManager Dial Plan, Call Routing and Media Resource

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Troubleshooting CallManager Dial Plan, Call Routing and Media Resource: Objectives Upon completing this lesson, you will be able to: List primary CallManager functions Define partition and calling search space Demonstrate problem isolation techniques when troubleshooting Route Patterns in a Dial Plan Demonstrate CallManager problem isolation methods for solving configuration problems related to Centralized Call Processing models Apply Troubleshooting methods for solving Media Resource issues Identify and troubleshoot Media Resource issues

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Outline Overview Cisco CallManager Overview Partitions and Calling Search Spaces Troubleshooting Route Patterns Distributed Call-Processing Model Centralized Call-Processing Model Troubleshooting Media Resources Summary Quiz

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Cisco CallManager Dial Plan Route Pattern Route List Remotes 1st Choice 2nd Choice Digit Manipulation 1. Discard access code 9 2. Send to GK No Digit Manipulation IOS Gatekeeper ARQ Send in H.323 setup Cisco CallManger strips leading digits and uses internal dial length (1212). Digit Manipulation 1. Discard access code 9 2. Insert 1 3. Send to PSTN Local gateway receives DID (1212) and sends internal dial length to Cisco CallManager. Remote CM User dials WAN Down or Insufficient Resources User dials Route Group IP WAN Route Group Local PSTN PSTN IP WAN

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Route Plan Visual Objective PSTN IP WAN A A Gatekeeper(s) Primary Voice Path Strip 52 and deliver to remote CCM Secondary Voice Path Prepend 1408 and send to PSTN (408) 526-xxxx Five-Digit Internal Dialing Users required to dial seven digits for intersite calls San Jose Dallas (817) 283-xxxx Five-Digit Internal Dialing

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Understanding Route Plans Route Pattern Route Group Device (gateway) Device (gateway) Route Group Device (gateway) Device (gateway) 1st Choice 2nd Choice User Dials Number 1st Choice 2nd Choice 2nd Choice 1st Choice Route List

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Internal vs. External Numbers xxxxxxxx 9.1[2-9]xx[2-9]xxxxxx 9.1xxxxxxxxxx 9.91! 9.11 Line #s GRP Pick Park MEET_ME_CONFERENCE DN (Internal) Route Pattern (External) x

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Most Commonly Used Wildcards xSingle digit (0 through American Numbering Plan !One or more digits (0 through 9) [x-y]Generic range notation [^x-y]Exclusion range notation.Terminates access code #Terminates interdigit timeout

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Digit Collection xxxxxxx [2-9]xxxxxx 9.[2-9]xxxxxx User dial string: Match! No other patterns could match extend call CCM actions: Route Pattern Longest match – Wins !

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Interdigit Timeout User dial string: 911 Route Pattern xxxxxxx [2-9]xxxxxx 9. xxxxxxx Match! Matches 1 billion+ digit strings Matches 10 million digit strings Matches 1 digit string

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Number Transformations Route Pattern Discard Digit Instruction Transform Calling Number Transform Called Number Users Dialed Numbers Users 9.1xxx A B C A B C Discard 9 Wildcards allow all dialed numbers to match one route pattern. Users Dialed Numbers A – 1234 B – 1324 C – 1432 x000 Users Directory Numbers A – 5000 B – 5000 C – 5000 x000 Users Dialed Numbers Caller ID A – 1000 B – 1000 C – 1000 D From 5000 Extension 1000 Rings

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Class of Service CoS 1CoS 2CoS 3 LobbyEmployeeExecutive Employee IP WAN PSTN Local International Who can you call? Long Distance 911

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Partition Definition Partition Gateway Local and WAN GatewayPT Route Pattern 5.7xxxx A partition is a logical grouping of patterns. All patterns in a partition are equally reachable. A partition is assigned to directory numbers and route patterns. Partition 911 E911PT Route Pattern Partition Lobby LobbyPT Directory Numbers Directory Numbers x Partition Employee EmployeePT Partition Executive ExecutivePT Directory Numbers x

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Calling Search Space Definition Lobby TelephoneEmployee TelephoneExecutive Telephone Local and WAN GWPT Calling Search Space E911PT EmployeePT Calling Search Space E911PT EmployeePT LocalGWPT WANGWPT Calling Search Space E911PT EmployeePT GWPT ExecutivePT Calling Search Space E911 EmployeePT A calling search space is an ordered list of partitions. Digit analysis looks through the list of partitions when searching for the closest match for the dialed number of the caller. A calling search space is assigned to devices, telephones, and gateways.

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Deployment Models Site A A PSTN Headquarters Branch B Branch C Distributed Campus Headquarters Branch B Branch C IP WAN PSTN Centralized IP WAN PSTN

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Overlapping Dial Plan xxxxxxxxxx Route Pattern Wait 15 Seconds [2-9]xx[2-9]xxxxxx Route Call What makes this overlapping ?

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Second Dial Tone 92xx 9.[2-9]xx xxxx 9.[2-9]xx[2-9]xx xxxx User dial string: Cisco CallManager actions: Route call Yes Outside Dial Tone Route Pattern

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Second Dial Tone (Cont.) User dial string: xx 9.[2-9]xx xxxx 9.[2-9]xx[2-9]xx xxxx Yes Outside Dial Tone Route Pattern Cisco CallManager actions: Route call

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Improper Routing Global Switch or PBX Digital Gateway 8 cents per minute WS-X6608-T1 12 cents per minute WS-X6624-FXS 15 cents per minute 1st choice Route Group B Route Group A Route List Route Pattern 2nd choice 1st choice Cisco Gateways 2nd choice

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v One-Way Calling Partition A 1211 Partition B CSS B, A 1234 CSS B X Reorder tone Call me back What happens if both DNs were not assigned a partition? OK

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Discard Digits Assignments PSTN Dial Plan Discard: PreDot 1010 dialing xxx1[2-9]xx[2-9]xx xxxx PSTN Dial Plan Discard: PreDot 91010xxx.1[2-9]xx[2-9]xx xxxx Gateway

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Reorder Tone Digit Dialed Reorder tone

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Distributed Call-Processing Model Headquarters Branch B Branch C IP WAN CCM VM or UM PSTN CCM VM or UM CCM VM or UM Primary path Secondary path VM or UM = voice mail or unified messaging

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Call Routing to PSTN Headquarters Branch B Branch C IP WAN CCM VM or UM PSTN CCM VM or UM CCM VM or UM Primary path Secondary path VM or UM = voice mail or unified messaging

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Off-Net Call to Another Cluster Headquarters Branch B Branch C CCM VM or UM CCM VM or UM CCM VM or UM No Entry for in Dial Plan IP WAN PSTN Primary path Secondary path VM or UM = voice mail or unified messaging

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Off-Net Call to Another Cluster (Cont.) Headquarters Branch B Branch C CCM VM or UM CCM VM or UM CCM VM or UM IP WAN PSTN BRANCH_B_GWY_CSS INTERNAL_PT Primary path Secondary path VM or UM = voice mail or unified messaging

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Remote Call Drops Immediately IP Phone C 30VIP X Y IP Phone A 7960 SCCP H.323 or Intercluster Trunk SCCP G.729 G.723 IP Phone BIP Phone D WAN(FR)

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Centralized Call-Processing Model Headquarters Branch B Branch C VM or UM IP WAN PSTN

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Geographic Boundaries Router or Gateway Hub IP WAN Router IP WAN Router Centralized Cisco CallManger Cluster Site 1 Site 2 PSTN Intralocation calls Interlocation calls Local PSTN calls IP WAN

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Media Resources Overview Media resources common issues: Software Conference Bridge or software- based MTP Hardware Conference Bridge or hardware- based MTP Transcoder (XCODE) Media termination points Music on hold (MOH) Headquarters Branch B Branch C IP WAN PSTN Centralized

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Common Media Resources Issues There are incorrect media resource groups and list configuration. Cisco CallManager ignored the Meet-Me Conference or Confrn soft key. Calls are dropped after they are connected. IP Phone cannot transfer or place on hold a PSTN call. Unicast or multicast MOH is not heard internally and or externally.

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Transcoder (XCODE) XCODE G.729 G.711 Voice Messaging MTP Input Stream Stream for Supplementary Services H.323 v1

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Media Resource Group Lists Media Resource Group Media Resource 1 Media Resource 2 Media Resource 3 Media Resource 4 1st Choice 2nd Choice User Needs Media Resource 1st Choice 2nd Choice 2nd Choice 1st Choice Media Resource Manager Similar to Route Lists and Route Groups Media Resource Group Assigned to Device Media Resource Group List

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v NO_CONF_LIST MTP MRG MTP1 MTP2 MOH MRG MOH1 MOH XCODE MRG XCODE1 XCODE2 Restrict Access to Conference Resources Result Device cannot use any conference resources. A MTP MRG MTP1 MTP2 CONF MRG SW-CONF1 SWCONF2 HW-CONF1 HW-CONF2 MOH MRG MOH1 MOH2 Resource_List XCODE MRG XCODE1 XCODE2 4

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Summary The Cisco CallManager dial plan design architecture includes route lists and groups, route patterns, translation patterns, dial peers, partitions and calling search spaces, and overlapping dial plans. You can define IP telephony CoS categories within partitions and calling search spaces as internal to a PBX, on the public switched network, or on a packet switched network. Different deployment types within a Cisco CallManager installation each have their own separate dial-plan issues. Problems specific to the distributed call-processing model include calls routing to the PSTN, off-net calls getting a reorder tone, and remote calls dropping immediately. Problems specific to the centralized call-processing model include calls routing to the wrong gateway and calls not using the proper gateway for a toll bypass. Media resource groups all allow hardware and software resources to coexist and allow users access to cluster and enable Cisco CallManager access resources available in the cluster. Media resource groups help load balance resources within a group of similar resources.

© 2004 Cisco Systems, Inc. All rights reserved. IPTT v Lesson Review 1. Which of the following is NOT an external route plan element? 2. Which route pattern wildcard represents a single digit (0-9)? 3. When does CCM perform digit analysis? 4. Which of the following describes a route group? 5. Which of the following best describes a partition?