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External Call Transfer Restrictions is a feature that you can use to configure gateways, trunks, and route patterns as OnNet (internal) or OffNet (external) devices at the system level. By setting the devices as OffNet, you can restrict the transferring of an external call to an external device and thus help prevent toll fraud.
If you try to transfer a call on an OffNet gateway or trunk when the service parameter Block OffNet to OffNet Transfer is set to True, a message displays on the user phone to indicate that the call cannot be transferred.
This chapter uses the following terms:
| Term | Description |
|---|---|
|
OnNet Device |
A device that is configured as OnNet and considered to be internal to the network. |
|
OffNet Device |
A device that is considered as OffNet and, when routed, is considered to be external to the network. |
|
Network Location |
The location of the device, which is considered as OnNet or OffNet, with respect to the network. |
|
Originating End |
The device that gets transferred. The system considers this device as OnNet or OffNet. |
|
Terminating End |
The device that receives the transferred call. The system considers this device as OnNet or OffNet. |
|
Incoming Call |
A call for which only gateways and trunks call classification settings get used to classify it as OnNet or OffNet. Route Pattern call classification settings do not apply. |
|
Outgoing Call |
A call for which the call classification setting of the trunk, gateway, and route pattern gets considered. The Allow Device Override setting on the route pattern determines whether the trunk or gateway call classification setting gets used instead of the route pattern call classification setting. |
| Command or Action | Purpose | |
|---|---|---|
| Step 1 | Configure the Service Parameter for Call Transfer Restrictions
| Block external calls from being transferred to another external device or number. |
| Step 2 | To configure incoming calls perform the following procedures: | Configure gateways and trunks as OnNet (internal) or OffNet (external) by using Gateway Configuration or Trunk Configuration or by setting a clusterwide service parameter. |
| Step 3 |
Configure Outgoing Calls
| Configure transfer capabilities with route pattern configuration. |
To block external calls from being transferred to another external device or number:
| Command or Action | Purpose | |
|---|---|---|
| Step 1 | (Optional) Configure the Clusterwide Service Parameter |
Configure all gateways or trunks in the Cisco Unified Communications Manager cluster to be OffNet (external) or OnNet (internal). |
| Step 2 |
Configure Gateways for Call Transfer Restrictions
|
Configure gateways as OnNet (internal) or OffNet (external) by using Gateway 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: |
| Step 3 |
Configure Trunks for Call Transfer Restrictions
|
Configure trunks as OnNet (internal) or OffNet (external) by using Trunk 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 trunk. You can configure the following devices as internal and external to Cisco Unified Communications Manager: |
To configure all gateways or trunks in the Cisco Unified Communications Manager cluster to be OffNet (external) or OnNet (internal), perform the following steps:
Configure the Service Parameter for Call Transfer Restrictions
To configure the gateway as OffNet, OnNet, or Use System Default, perform the following procedure. The system considers calls that come to the network through that gateway as OffNet or OnNet, respectively.
To configure the trunk as OffNet, OnNet, or Use System Default, perform the following procedure. The system considers calls that come to the network through that trunk as OffNet or OnNet, respectively.
To classify a call as OnNet or OffNet, administrators can set the Call Classification field to OnNet or OffNet, respectively, on the Route Pattern Configuration window. Administrators can override the route pattern setting and use the trunk or gateway setting by checking the Allow Device Override check box on the Route Pattern Configuration window.
| Step 1 | From Cisco Unified CM Administration, choose and click Find to list all route patterns. |
| Step 2 | Choose the route pattern you want to configure, or click Add New. |
| Step 3 | In the
Route
Pattern Configuration window, use the following fields to configure
transfer capabilities with route pattern configuration:
|
| Step 4 | Click Save. |
|
Feature |
Interaction |
|---|---|
|
Drop Conference |
The Drop Conference feature determines whether an existing ad hoc conference should be dropped by checking whether the conference parties are configured as OffNet or OnNet. You use the service parameter Drop Ad Hoc Conference and choose the option When No OnNet Parties Remain in the Conference to configure the feature. You determine OnNet status for each party by checking the device or route pattern that the party is using. For more information, see topics related to Ad Hoc Conference linking in the “Ad Hoc Conferencing” chapter. |
|
Bulk Administration |
Bulk Administration inserts gateway configuration (OffNet or OnNet) on the Gateway Template. For more information, see the Cisco Unified Communications Manager Bulk Administration Guide. |
|
When used to perform digit analysis on a gateway, DNA displays the Call Classification that is configured for the gateway and the route pattern. For more information, see the Cisco Unified Communications Manager Dialed Number Analyzer Guide. |
|
Restriction |
Description |
|---|---|
|
FXS Gateways |
FXS gateways such as Cisco Catalyst 6000 24 Port do not have a Call Classification field on the Gateway Configuration window; therefore, the system always considers them as OnNet. |
|
Cisco VG248 Gateway |
The system does not support the Cisco VG248 Gateway which does not have a Call Classification field. |
|
FXS Ports |
Cisco Unified Communications Manager considers all Cisco Unified IP Phones and FXS ports as OnNet (internal) that cannot be configured as OffNet (external). |