Video Call

Video Call Type

This section is only applicable to the lab application.

In the lab application only, the Synchronous/Transparent CS Data Service supports three types of video calls, UE-to-UE video calls, UE-to-8960LAN video calls, and Loopback video calls. A test application with the required feature license supports only UE-to-UE video calls.

When the test set receives a request from the UE for a video call connection, the Video Call Type setting determines whether the test set attempts to set up the connection as a UE-to-UE video call (the test set must have an External Device Connection with another test set for this to succeed), a UE-to-8960LAN video call, or a Loopback video call.

GPIB command: CALL:VIDeo:TYPE

This setting can only be changed when call status is idle.

UE-to-UE Video Call

This section is only applicable to the lab application and to a test application with the required feature license.

The Synchronous/Transparent CS Data Service can be used to make an 3G-324M (derived from H.324M) UE-to-UE video call. Before making a UE-to-UE video call, you must first establish an External Device Connection between two 8960s. The external device connection allows the two 8960s to coordinate the setup and release of the CS data service and exchange the traffic plane data being sent by the UEs. This configuration allows the 3G-324M layers in the two UEs to communicate as they would in a real network to provide a video call service.

Once you have established an external device connection between the two 8960s and have camped the UEs to the 8960s, you can originate a UE-to-UE video call from one of the UEs, and answer the call on the other. The 8960 connected to the originating UE commands the other 8960 to set up a CS data synchronous/transparent call to its UE. Once the call has been connected (the UE has responded to the page and you've answered the call), the call setup is completed to the originating UE and 3G-324M traffic data begins to flow (see UE-Initiated UE-to-UE Video Call Origination Ladder Diagram ladder diagram). You can release the UE-to-UE video call from either of the UEs (see UE-Initiated UE-to-UE Video Call Release Ladder Diagram ladder diagram), or from either of the 8960s (see Test Set-Initiated UE-to-UE Video Call Release Ladder Diagram ladder diagram).

For the lab application only, the number dialed into the UE originating the call is displayed in the UE Information area under Called Party Number , and if Calling Party Number Inclusion is set to Include , the Calling Party Number is displayed on the screen of the UE receiving the call (see Calling Party Number Parameters ). Once a UE-to-UE video call is established, the Current Service Type becomes CS Data - UE to UE Video Call.

While on a UE-to-UE video call, you can perform many transmitter measurements on the UEs. For the lab application only, you can also monitor the over-the-air messaging between the 8960s and UEs using the Wireless Protocol Advisor's (WPA) Protocol Logging functionality. The WPA will not capture the proprietary messages sent between the two 8960s, nor will it decode the 3G-324M application layer messages from the UEs.

Other Considerations

The 8960 receiving the UE-to-UE video call origination must be in Active Cell Operating Mode , in Idle state.

If one of the 8960s is partially preset while up on a UE-to-UE video call, the call to its UE is dropped with no over-the-air signaling. If the other UE does not recognize that the call has dropped (and thus ends the call), you should manually end the call or partially preset its 8960 as well.

If one of the 8960s is fully preset while up on a UE-to-UE video call, the external device connection is disconnected, which causes both 8960s to end the call with their respective UEs.

UE-to-8960LAN Video Call

This section is only applicable to the lab application.

The UE-to-8960LAN video call feature is used to establish a 3G-324M (derived from H.324M) video call between a UE and an external device via the test set's LAN 2 PORT . The test set processes the signalling required to establish a Synchronous/Transparent CS Data Service bearer. The UE and external device then exchange signalling and 3G-324M data over this bearer.

The UE-to-8960LAN feature includes two interfaces: the control interface and the data interface.

The control interface sends and receives control messages to and from the external device. The following messages can be sent between the test set and external device control interfaces:

Establish Video Call Request

You can originate a UE-to-8960LAN video call from your UE (see UE-Initiated UE-to-8960LAN Video Call Origination Ladder Diagram ). You can also originate a UE-to-8960LAN video call from your external device by sending an "Establish Video Call Request", which is formatted as follows:

The test set then pages the UE and establishes the CS data bearer. See External Device-Initiated UE-to-8960LAN Video Call Origination Ladder Diagram .

Allow Remote Call Origination State must be set to On to originate a UE-to-8960LAN video call from your external device.

Terminate Video Call Request

You can release the UE-to-8960LAN video call from your UE (see UE-Initiated UE-to-8960LAN Video Call Release Ladder Diagram ) and from the test set (by selecting End Call ( F3 ), see Test Set-Initiated UE-to-8960LAN Video Call Release Ladder Diagram ). You can also release the UE-to-8960LAN video call from your external device by sending a "Terminate Video Call Request", which is formatted as follows:

The test set then sends a Disconnect message to the UE and releases the CS data bearer. See External Device-Initiated UE-to-8960LAN Video Call Release Ladder Diagram .

Allow Remote Call Release State must be set to On to release the UE-to-8960LAN video call from your external device.

Video Call Established Indication

If you set Sending of Call Status Indication State to On , after the CS data bearer is established (call status changes to Connected ), the test set will send a "Video Call Established Indication" to the external device, which is formatted as follows:

See UE-Initiated UE-to-8960LAN Video Call Origination Ladder Diagram and External Device-Initiated UE-to-8960LAN Video Call Origination Ladder Diagram . Note that the timing between the "Video Call Established Indication" and the arrival of the first data message on the data interface is not specified; either message can arrive at the external device first.

Video Call Terminated Indication

If you set Sending of Call Status Indication State to On , after the CS data bearer is released (call status changes to Idle ), the test set will send a "Video Call Terminated Indication" to the external device, which is formatted as follows:

See UE-Initiated UE-to-8960LAN Video Call Release Ladder Diagram , Test Set-Initiated UE-to-8960LAN Video Call Release Ladder Diagram and External Device-Initiated UE-to-8960LAN Video Call Release Ladder Diagram . Note that the timing between the "Video Call Terminated Indication" and the arrival of the last data message on the data interface is not specified; either message can arrive at the external device last.

UE-to-8960LAN Control Parameters

• Allow Remote Call Origination State

  Allow Remote Call Origination State must be set to On before you can originate a UE-to-8960LAN video call from your external device (using an Establish Video Call Request ). If Allow Remote Call Origination State is set to Off , if the external device sends an "Establish Video Call Request", an error is posted by the test set.

  GPIB command: CALL:VIDeo:LAN:CONTrol:RCORiginate[:STATe]

  This setting can only be changed when call status is idle.

• Allow Remote Call Release State

  Allow Remote Call Release State must be set to On before you can release the UE-to-8960LAN video call from your external device (using a Terminate Video Call Request ). If Allow Remote Call Release State is set to Off , if the external device sends a "Terminate Video Call Request", an error is posted by the test set.

  GPIB command: CALL:VIDeo:LAN:CONTrol:RCRelease[:STATe]

  This setting can only be changed when call status is idle.

• Sending of Call Status Indications State

  If you set Sending of Call Status Indication State to On , the test set sends Video Call Established Indication and Video Call Terminated Indication messages to the external device as the call status changes.

  GPIB command: CALL:VIDeo:LAN:CONTrol:CSISend[:STATe]

  This setting can only be changed when call status is idle.

• Control Message Receiving UDP Port

  This setting controls the UDP port number that the test set uses to receive control messages from the external device. The IP address that the test set uses to receive control messages from the external device is determined by the LAN IP Address setting. Ensure that your external device is set to send control messages to the UDP port and IP address specified by these two settings.

  GPIB command: CALL:VIDeo:LAN:CONTrol:RECeive:UDP:PORT

  This parameter can only be changed when call status is idle. This parameter is a non-volatile parameter; it is not affected by any reset operation and can only be changed by direct access to the parameter itself.

• Control Message Destination IP Address

  This setting controls the IP address that the test set uses to send control messages to the external device. Ensure that your external device is set to receive control messages at the IP address specified by this setting.

  GPIB command: CALL:VIDeo:LAN:CONTrol:SEND:IP:ADDRess

  This parameter can only be changed when call status is idle. This parameter is a non-volatile parameter; it is not affected by any reset operation and can only be changed by direct access to the parameter itself.

• Control Message Destination UDP Port

  This setting controls the UDP port number that the test set uses to send control messages to the external device. Ensure that your external device is set to receive control messages at the UDP port number specified by this setting.

  GPIB command: CALL:VIDeo:LAN:CONTrol:SEND:UDP:PORT

  This parameter can only be changed when call status is idle. This parameter is a non-volatile parameter; it is not affected by any reset operation and can only be changed by direct access to the parameter itself.

UE-to-8960LAN Data Parameters

The data interface routes the CS data packets that contain the 3G-32M data between the UE and external device. The test set supports one type of data message: 160 byte (1280 bits) comprising two RLC blocks of the 64k UL/DL CS data service. The data message does not have any header fields.

• Data Message Receiving UDP Port

  This setting controls the UDP port number that the test set uses to receive data messages from the external device. The IP address that the test set uses to receive data messages from the external device is determined by the LAN IP Address setting. Ensure that your external device is set to send data messages to the UDP port and IP address specified by these two settings.

  GPIB command: CALL:VIDeo:LAN:DATA:RECeive:UDP:PORT

  This parameter can only be changed when call status is idle. This parameter is a non-volatile parameter; it is not affected by any reset operation and can only be changed by direct access to the parameter itself.

• Data Message Destination IP Address

  This setting controls the IP address that the test set uses to send data messages to the external device. Ensure that your external device is set to receive data messages at the IP address specified by this setting.

  GPIB command: CALL:VIDeo:LAN:DATA:SEND:IP:ADDRess

  This parameter can only be changed when call status is idle. This parameter is a non-volatile parameter; it is not affected by any reset operation and can only be changed by direct access to the parameter itself.

• Data Message Destination UDP Port

  This setting controls the UDP port number that the test set uses to send data messages to the external device. Ensure that your external device is set to receive data messages at the UDP port number specified by this setting.

  GPIB command: CALL:VIDeo:LAN:DATA:SEND:UDP:PORT

  This parameter can only be changed when call status is idle. This parameter is a non-volatile parameter; it is not affected by any reset operation and can only be changed by direct access to the parameter itself.

Loopback Video Call

This section is only applicable to the lab application.

The loopback video call provides a way for a UE to establish an H.324M video call directly with the test set without requiring any external entities (as are required for UE-to-UE video calls and UE-to-8960LAN video calls).

For this type of video call, the video and audio streams are simply looped back from the uplink to the downlink. That is, the UE will display the same data that its video camera is sending. The test set mimics a true H.325M peer to UE since it has the control plane layer (H.245) and the multiplexing layer (H.223) fully implemented. Since the test set is looping back data sent from the UE rather than generating data, it relies on the UE to initiate the H.324 procedures and simply agrees to any requests from the UE.

Related Topics

Manual Operation: How Do I Make a Video Call?

Video Call Ladder Diagrams

CALL:STATus:SERVice:TYPe?

Troubleshooting Video Call

External Device Connection

Synchronous/Transparent CS Data Service