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Narrowcast streaming zones
Last Updated: July 07, 2026

All narrowcast service groups are assigned to streaming zones so that all DEPI enabled transport streams are uniquely identified within an RxD device using a session ID.

An operator can define the range of Narrowcast Session IDs from 0x80008000-0x8000DFFF allowing for 57,344 unique Narrowcast Session IDs. However, due to various operational and service providing use cases that drive a large number of Narrowcast Service Groups and the services provided within them (number of transport streams, and so on), a maximum of 57,344 unique transport stream session IDs may not be adequate.

To overcome this issue, operators can manage Streaming Zones, where each Streaming Zone has its own pool of unique Narrowcast DEPI Transport Stream session IDs (0x80008000-0x8000DFFF) assigned to it. A Streaming Zone can then be applied to one or more Narrowcast Service Groups. Since sessions IDs need to be unique within an RxD, an RxD device can only belong to Narrowcast Service Groups assigned to the same Streaming Zone.

Add Narrowcast streaming zone

  1. Click Configuration in the navigation bar.
  2. Select the Narrowcast Streaming Zones tab.
  3. Click the (Menu) button.
  4. Click Add.

    The Add Streaming Zone dialog is displayed.

  5. In the Add Streaming Zone dialog, enter a streaming zone name.
  6. Click Save.

    A new streaming zone is added.

Edit Narrowcast streaming zone

  1. Select Configuration in the navigation bar.
  2. Select the Narrowcast Streaming Zones tab.
  3. Select a streaming zone to be edited.
  4. Click the (Menu) button.
  5. Click Edit.
  6. Edit the streaming zone name.
  7. Click Update.
  8. Click Close.

Narrowcast streaming zone details

Each streaming zone consists of the following information:

FieldDescription
NameA name assigned to the streaming zone for unique identification.
Service GroupsThe number of service groups associated with the streaming zone.
Transport StreamsThe number of transport streams associated with the streaming zone.
DEPI Sessions In Use The count of DEPI session IDs in use for this streaming zone. For DEPI transport streams, VTM maintains a pool of session IDs per streaming zone where this count identifies the number of session IDs in-use for these DEPI transport stream sessions.
DEPI Sessions AvailableThe count of DEPI sessions IDs available for DEPI transport stream session within this streaming zone.

Delete a streaming zone

  1. Click Configuration in the navigation bar.
  2. Select the Narrowcast Streaming Zones tab.
  3. Select a streaming zone to be deleted.
  4. Click the (Menu) button.
  5. Click Delete.
  6. In the Delete window, click Delete.
    NOTE: You cannot delete the default narrowcast streaming zone.
    The streaming zone is removed.