Enabling Telephony Features with CUCM - CCNA Voice 640-461 - page 312

Configuring Intercom Features
As previously discussed, the Intercom feature uses special Intercom DNs, Partitions, and
Calling Search Spaces. The following steps walk through setting up the Intercom feature:

Key
To p i c

1. Navigate to Call Routing > Intercom > Intercom Route Partition .
2. Click Add New . In the Configuration Page, enter the name and comma-separated de-
scription of the new Intercom Partition. You can create up to 75 Partitions at once on
this page.
3. Click Save .
4. Navigate to Call Routing > Intercom > Intercom Calling Search Space . Click Find ,and
note that an Intercom CSS has been automatically created as a result of creating the In-
tercom Partition (the auto-named entry will be < partition_name >_GEN). The auto-
generated CSS automatically includes the Intercom Partition just created. You may use
the auto-generated CSS, modify it, or create custom Intercom CSSs as desired.

Note: A custom Intercom CSS is really only necessary if an Intercom button needs to
support multiple (dialed instead of speed dialed) targets, and access to some of those tar-
gets must be limited. If you are creating point-to-point Intercom lines, there is no need to
customize the Intercom CSS.

5. Navigate to Call Routing > Intercom > Intercom Directory Number .
6. Click Add New to create an Intercom DN. You must create at least two, because of
the one-way nature of Intercom DNs and the fact that an Intercom DN cannot call an
ordinary DN.
7. Assign an Intercom Partition and Intercom Calling Search Space to the Intercom
DNs according to your call control design.
To configure a phone with an Intercom button, the Phone Button Template must be modi-
fied. (Alternatively, you could modify the button directly from the Phone configuration
page, but this kind of one-off configuration is more difficult to administer and does not
scale well.) To set up and apply the Phone Button Template, follow these steps:
1. Navigate to Device > Device Settings > Phone Button Template .
2. Select the Phone Button Template that corresponds to the phone/protocol for which
you want to configure Intercom. You may modify the stock profile, copy it and mod-
ify the copy, or create a new one from scratch. Copying and modifying the copy is
the recommended action.
3. In the Phone Button Template configuration window, add the Intercom feature to the
desired button appearance.
4. Click Save .
Figure 11-18 shows the Phone Button Template configuration.

Now that we have the DNs and template set up, we can assign the template to the phones:
1. Apply the template to a phone by selecting the modified template from the pull-
down in the phone's configuration page.