- Introduction
- Components Used
- Network Topology
- Configuring Cisco Unified Communications Manager
- Configuring the Cisco Unified Border Elements
- Troubleshooting
- Related Information
Introduction
This document covers the Network Design and Configuration of SIP Trunk deployement between the Cisco Unified Communications Manager (CUCM) and Service Provider Soft Switch.
This model of SIP Trunk Interconnection is widely used by large enterprises with branch office connecting to SIP Service Provider for routing Long distance Calls. It covers the Network topology with Components used and the Configuration screenshots.
Components Used
- Cisco Unified Communications Manager 7.1(3)
- Cisco Unified Border Element (Cisco UBE)
- 7962 IP Phones
Configuration in this document are tested on specific lab environment using CUCM 7.1(3). The Procedures remains the same for CUCM 7.x and 8.x. Hence this document will be applicable for both CUCM 7.x and CUCM 8.x
Network Topology
Cisco Unified Communications Manager CUCM is located at the Headquarters with IP Phones Interconnected and Cisco UBE with SRST feature is located at the Branch office Interconnecting the IP Phones in the Branch location.
Case Study
SIP Trunk has to be established between the CUCM 172.16.101.210 at Headquarters, Cisco Unified SRST and the SIP Service Provider Soft Switch 10.6.33.32.
Long Distance Calls with Route Pattern 98400 has to be routed from the CUCM IP Phones at the Headquarters and Branch towards the SIP Service Provider thru the Cisco UBE in the respective locations.
CUCM: 172.16.101.210
Cisco UBE at Headquarters: 10.30.97.5
Cisco UBE at Branch: 10.40.95.2
SIP SP Softswitch: 10.6.33.32
Configuring Cisco Unified Communications Manager
1. Configuring the System Parameters : Server
Go to Cisco Unified CM > System > Server and Configure the following
· Host Name / IP address : 172.16.101.210
· Description : CUCM - HDQ
2. Configuring the System Parameters : Region
Go to Cisco Unified CM > System > Region and Configure the following
· Name : Region-HQ-IPPhone
· Audio codec : G.729
· Video call Bandwdth
Similarly Create the Region, "Region –Branch-IPPhone" and "Region WAN"
3. Configuring the System Parameters : Device
Go to Cisco Unified CM > System > Device and Configure the following
· Device Pool Name : DevicePool _Region_HDQ
· Region : Region-HQ-IPPhone
· Video call Bandwdth
Similarly Create the Device Pool, "DevicePool_Branch" and "DevicePool_WAN"
4. Configuring the System Parameters : Location
Go to Cisco Unified CM > System > Location and Configure the following
· Name : HUB_HDQ
· Audio Bandwidth
· Video Bandwidth
Similarly Create the Location "HUB_REGION"
5. Configuring the System Parameters : SRST
Go to Cisco Unified CM > System > SRST and Configure the following
· Name : SRST-to-BRANCH1
· Port : 2000
· IP address : 172.16.103.210 (Branch CUBE IP address with SRST enabled)
· SIP Port : 5060
6. Configuring the Call Routing Parameters : Class of control
Go to Cisco Unified CM > Call Routing > Class of control and Configure the following
· Name : Partition_HDQ_IPPhones
· Description : Partition_HDQ_IPPhones
Similarly Create the Partitions, "Partition_Region_IPPhones"
7. Configuring the Call Routing Parameters : Calling Search Space
Go to Cisco Unified CM > Call Routing > Calling search space and Configure the following
· Name : CSS_HDQ_IPPhone
· Description : CSS_HDQ_IPPhone
· Select the Partitions to Route Partitions for the Calling search space
Similarly Create the Calling search space, "CSS_Branch_IPPhone".
8. Configuring the Device Parameters : Gateway
Go to Cisco Unified CM > Device> Gateway and Configure the following
· Product : Cisco 3845
· Gateway : 3845BR
· Protocol : MGCP
· Domain Name : 3845BR
· Description : Branch1 GW ( located at the Branch office )
9. SIP Trunk Creation from CUCM to Service Provider
9.1. Configuring the Device Parameters : Trunk
Go to Cisco Unified CM > Device> Trunk and Configure the following
· Product : SIP Trunk
· Device Protocol : SIP
· Device Name : GW-SIP-HQ
· Device Pool : DevicePool_Region_HDQ
· Class classification : Use system default
· Location : HUB_HDQ
· Under the section Inbound calls : Calling Search Space – CSS_HDQ_IPPhone
SIP Trunk Creation from CUCM to Gateway at Headquarters IP : 10.30.97.5 and then Call Routed to Service Provider IP : 10.6.33.32
SIP Trunk Creation from CUCM to Gateway at Branch IP : 10.40.95.2 and then Call Routed to Service Provider IP : 10.6.33.32
· Product : SIP Trunk
· Device Protocol : SIP
· Device Name : GW-SIP-BR
· Device Pool : DevicePool_Branch
· Class classification : Use system default
· Location : HUB_REGION
· Under the section Inbound calls : Calling Search Space – CSS_Branch_IPPhone
10. Configuring the Route Pattern for Routing the Calls Towards the SIP Service Provider
10.1. Configuring the Call Routing Parameters : Route/Hunt
Go to Cisco Unified CM > Call Routing > Route/Hunt and Configure the following
Creating Route Pattern for long distance calling from Headquarters
· Route Pattern : 98400xxxxx
· Route Partition : Partition_HDQ_IPPhones
· Description : Longdistance call to SIP SP
· Gateway/Routelist : GW-SIP-HQ( GW: 10.30.97.5, Refer Section 9 : Configuring the Device Parameter :Trunk )
Creating Route Pattern for long distance calling from Branch
· Route Pattern : 98400xxxxx
· Route Partition : Partition_Region_IPPhones
· Description : Longdistance call to SP
· Gateway/Routelist : GW-SIP-BR( GW: 10.40.95.2, Refer Section 9 : Configuring the Device Parameter :Trunk )
11. Configuring the Device Parameters : Phone
Go to Cisco Unified CM > Device> Phone and Configure the following
Create IP Phones in the Headquarters
· MAC Address
· Directory Number : 4155000
· Device Pool : DevicePool_Region_HDQ
· Calling search space : CSS_HDQ_IPPhone
Create IP Phones in the Branch
· MAC Address
· Directory Number : 4156000
· Device Pool : DevicePool_Branch
· Calling search space : CSS_Branch_IPPhone
Configuring the Cisco Unified Border Elements
Configure the Dial-peer for Routing Long distance Outgoing Call from CUCM To SIP Service Provider
CUCM IP : 172.16.101.210
SIP Service Provider IP : 10.6.33.32
Sample Dial-Peer Configuration for Routing Calls to SIP SP
Sample CUBE-HQ Configuration
CUBEHQ # Voice service voip ! dial-peer voice 3000 voip
dial-peer voice 3001 voip
dial-peer voice 3003 voip dtmf-relay rtp-nte digit-drop
********* Routing 98400xxxxx towards SIP Service Provider IP : 10.6.33.32 ***********
|
| Note:- This section covers only the Dial-Peer Configuration for routing calls towards the SIP Service Provider |
Sample Dial-Peer Configuration of CUBE located at Branch office
Sample CUBE-Branch Configuration
BRGW #
voice service voip ! mgcp
********* Routing 98400xxxxx towards SIP Service Provider IP : 10.6.33.32 ***********
dial-peer voice 5000 voip
dial-peer voice 5001 voip
dial-peer voice 5000 voip |
| Note:- This section covers only the Dial-Peer Configuration for routing calls towards the SIP Service Provider |
Troubleshooting
How to do packet capture from cucm when placing a call to /from SIP Trunks?
