/mcpConfigure Incoming Calls Task Flow Procedure Purpose Command or Action Configure all gateways or trunks in the Cisco Unified Communications Manager cluster to be OffNet (external) or OnNet (internal). (Optional) Configure the Clusterwide Service Parameter, on page 509 Step 1 Configure gateways as OnNet (internal) or OffNet (external) by using Gateway Configure Gateways for Call Transfer Restrictions, on page 510 Step 2 Configuration. When the feature is used in conjunction with the clusterwide service parameter Block OffNet to OffNet Transfer, the configuration determines whether calls can transfer over a gateway. You can configure the following devices as internal and external to Cisco Unified Communications Manager: • H.323 gateway • MGCP FXO trunk • MGCP T1/E1 trunk Configure trunks as OnNet (internal) or OffNet (external) by using Trunk Configuration. When Configure Trunks for Call Transfer Restrictions, on page 510 Step 3 the feature is used in conjunction with the clusterwide service parameter Block OffNet to OffNet Transfer, the configuration determines whether calls can transfer over a trunk. You can configure the following devices as internal and external to Cisco Unified Communications Manager: • Intercluster trunk • SIP trunk Configure the Clusterwide Service Parameter To configure all gateways or trunks in the Cisco Unified Communications Manager cluster to be OffNet (external) or OnNet (internal), perform the following steps: Before you begin Configure the Service Parameter for Call Transfer Restrictions, on page 508 Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 509 Receiving Calls Configure Incoming Calls Task Flow