How to Configure Inter Cluster Trunking (ICT)without Gatekeeper in CallManager 6 , 7 and 8?

Four different methods of trunking:

1. H.225 trunking with Gatekeeper

This trunking is used if one side cluster is using Ver 3.0 or Latest CUCM and other side is having Ver 6.0, 7 and 8 CUCM.

2. Inter Cluster Trunking with Gatekeeper

This trunking is used if one side cluster is using Ver 3.0 or older CUCM while other side is having Ver 6.0, 7 and 8 CUCM.

3. Inter Cluster Trunking without Gatekeeper

If there is no Gatekeeper and both sides can use any version of CUCM then this option is better to select. It is also known as Peer-to-Peer trunking.

4. SIP Trunking

If one side is using CUCM and other side is having SIP server or any other vendor then SIP trunking is used.

Inter Cluster Trunking without Gatekeeper:

Configuration:

Step 1: (Complete Routing on both Gateways)

Step 2: (CM1 Configuration)

- Cisco Unified CM Administration -> Device -> Trunk -> Add New -> Trunk Type = “Inter-Cluster Trunk NON-Gatekeeper Controlled” -> Device Protocol = “Inter Cluster Protocol” -> Next -> Device Name “ICT-site-1” -> Device Pool -> Select “default”

- Remote Cisco Unified Communications Manager Information -> Enter other side’s CUCM IP Address = 192.168.100.101 -> Save -> Reset.

Step 3: (Define Route Pattern)

- Cisco Unified CM Administration -> Call Routing -> Route/Hunt -> Route Pattern -> Add New -> Route Pattern “9.XXXX” -> Select gateway = “ICT-site-1” -> Called Party Transformation = PreDot -> Save

Step 4: (CM2 Configuration)

- Remote Cisco Unified Communications Manager Information -> Enter other side’s CUCM IP Address = 192.168.10.6 -> Save -> Reset.

Step 5: (Define Route Pattern)

Cisco Unified CM Administration -> Call Routing -> Route/Hunt -> Route Pattern -> Add New -> Route Pattern “9.XXXX” -> Select gateway = “ICT-site-2” -> Called Party Transformation = PreDot -> Save.

Suggested Reading

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