This section contains advanced ISDN configuration information for the V.35/RS-449/RS-530, PRI, and BRI network interfaces. The information displayed on the various ISDN configuration screens varies according to the network interface that is attached to your ViewStation FX or VS4000 system. The configuration information is divided into:
❑
Advanced V.35/RS-449/RS-530 Network Interface Configuration❑
Advanced PRI Network Interface Configuration❑
Advanced Quad BRI Network Interface ConfigurationOnce your ISDN configuration is complete, you may want to place a test call. For information about placing a call, refer to Video Calls on page 176.
Advanced V.35/RS-449/RS-530 Network Interface Configuration
This section describes information and settings for the following advanced V.35/RS-449/RS-530 configuration screensR:
❑
Advanced V.35 (Setup). See Configuring theV.35/RS-449/RS-530 Serial Interface Control Signals, on page 122.
❑
Broadcast Mode. See Setting up Satellite (H.331) Broadcast Mode, on page 123.❑
Dialing Speeds. See Selecting Dialing Speeds, on page 125.❑
Advanced Dialing (Calling Profile, Prefix, Suffix). See Setting the Calling Profile, on page 126.❑
Crypto Resync Pulse. See Enabling Crypto Resync on page 128.Notes
The V.35/RS-449/RS-530 network interface supports the V.35, RS-449, or RS-530 protocol depending on the cable you use to connect your equipment to the network interface.
For information about the initial V.35/RS-449/RS-530 configuration screens, see Setup for the V.35/RS-449/RS-530 Network Interface on page 80.
Configuring the V.35/RS-449/RS-530 Serial Interface Control Signals The ViewStation FX and VS4000 are designed to be compatible with the tested network equipment without any modification needed..
However, if your network equipment varies from the conventional V.35/RS-449/RS-530 video implementations, use the Advanced V.35 screen to adjust the operation of many of the signals.
To access this screen:
Select System Info > Admin Setup > Video Network > Advanced V.35.
Figure 4-9. Advanced V.35 Screen
The default setting for these signals is Normal. To invert these signals, select Inverted.
Note
For more detailed information about serial interface control signals, to the Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000.
Direct Connect
The following information applies only to V.35 Direct Connect setups.
Direct Connect users can choose to have the local system answer a video call when it detects data from a remote site, or hang up when it detects lack of data from the remote site. This Direct Connect signal lead would be in addition to existing V.35 signal leads that control answer/hang up call states. A description of the use of these signals can be found in the Integrators’ Reference Manual for
ViewStation EX, ViewStation FX, and VS4000.
Setting up Satellite (H.331) Broadcast Mode
The ViewStation FX and VS4000 with a V.35/RS-449/RS-530 network interface support H.331 broadcast mode for broadcast transmissions via satellite. In this mode, your system sends and receives audio and video without handshaking with the far-site system or H.331-compatible systems.
One system can send video and audio to many systems or other H.331-compatible systems, such as large satellite network.
Broadcast configuration parameters should be set to accommodate the lowest common denominator of the systems which are receiving the broadcast. For example, if one system in the conference supports H.261 only, broadcast should be set to H.261 to ensure all systems participate in the conference.
To access the Broadcast Mode screen:
1. Enable Broadcast Mode Setup in the Video Network screen (System Info > Admin Setup > Video Network > Video Network). The Broadcast Mode Setup satellite icon appears.
2. Select the Broadcast Mode Setup icon to access the Broadcast Mode configuration screen.
Figure 4-10. Video Network Screen and Broadcast Mode Screens
On the Broadcast Mode screen, you can set the following video and audio preferences:
❑
Video Format—Select QCIF to transmit Quarter Common Interchange Format (176 x 144 resolution). Select FCIF to transmit FCIF (Full CIF 352 x 288 resolution)❑
Video Protocol—Select H.261 to transmit video using the H.261 video standard. Select H.263 to transmit video using the H.263 enhanced video algorithm. Far-end systems that support H.263 receive H.263.❑
Audio Mode—Select the preferred audio protocol to transmit audio: G.728, G.711u, G.711A, G.722-56, G.722-48, or Off.❑
Frame Rate—Select the preferred video frame rate for the broadcast transmission: 30 fps, 15 fps, 10 fps, or 7.5 fps.Selecting Dialing Speeds
This screen lets you limit the choices that appear as speed selections.
Offering a minimum number of speeds is a way to lower network traffic. The speeds that are selected in this screen will be displayed as dialing speed selections in the Video Phone and in the Address Book screens.
To select dialing speeds:
1. Enable RS-366 Dialing on the Video Network screen (System Info > Admin Setup > Video Network > Video Network).
2. Select Dialing Speeds. Choose the appropriate dialing speeds on the Dialing Speeds screen.
The default dialing speeds are 2 x 64 Kbps, 128 Kbps, 256 Kbps, 384 Kbps, 512 Kbps, and 768 Kbps.
3. To add or remove speeds, scroll through the data rates and press the SELECT button on the remote control to select your preferred dialing speeds; a red check appears when a dialing speed is selected.
The selected dialing speeds apply only to RS-366 calls.
The Nx56 and Nx64 columns list the dialing speeds available for ISDN calls.
The IPx56 and IPx64 columns list the dialing speeds available for IP calls.
For non-dialed calls, the call speed is determined by the DCE.
Figure 4-11. Dialing Speeds Screen
Note
A V.35/RS-449/RS-530 system cannot receive an inbound call from a non-V.35/RS-449/RS-530 system at an n x 56 k common speed.
Common speeds are speeds that are divisible by both 56 and 64.
These include 8 x 56k (448 or 7 x 64), 16 x 56k (896 or 14 x 64), and 24 x 56k (1344 or 21 x 64). Because a V.35/RS-449/RS-530 system cannot determine how bandwidth is allocated–it only receives the total clock speed–it does not know how these “common speed”
connections are supposed to be established. This causes problems when a non-V.35/RS-449/RS-530 system calls a
V.35/RS-449/RS-530 system at one of these n x 56k common speeds (the connection is not established correctly).
Setting the Calling Profile
The Advanced Dialing screen lets you set or modify your calling profile. Calling profiles for several manufacturers are included in the ViewStation FX and VS4000 system.
If you enabled RS-366 Dialing, you need to set the dialing prefixes and suffixes associated with dialing through your particular DCE equipment and your system.
Dialing prefixes are numbers and characters that are sent to your DCE equipment before sending the number dialed.
Dialing suffixes are numbers and characters that are sent to your DCE equipment after the number is dialed.
Prefixes and suffixes are used to tell your DCE equipment at what speed to dial the call. Users have only to select the dialing speed when they place a call.
Note
Prefixes and suffixes are a function of your DCE. Please consult the DCE user guide for additional information on setting dialing profiles.
To set or modify the calling profile:
1. Make sure that RS-366 Dialing is enabled on the Video Network screen (System Info > Admin Setup > Video Network).
2. On the Video Network screen, select Advanced Dialing.
The Advanced Dialing screen appears. This screen lets you select or modify the Calling Profile associated with dialing through a DCE.
Figure 4-12. Advanced Dialing Screen (Page 1)
3. Select the Calling Profile field if you select or modify your Calling Profile associated with dialing through your DCE. The following calling profile list appears.
Figure 4-13. Advanced Dialing Screen (Calling Profile List)
4. Select the appropriate equipment/manufacturer from the drop-down list and press the SELECT button on the remote control.
5. When you have finished, review your entry. The Prefix or Suffix information (depending on the equipment name that you selected) is now visible on the Advanced Dialing screen.
Note
You have to enter this information only once on the Advanced Dialing screen. When you place a call, there is no need to enter the prefix again; simply select the preferred dialing speed and the system enters the proper prefix.
Enabling Crypto Resync
If a cryptographic encoder/decoder is connected between the ViewStation FX or the VS4000 system and the network, it may require a resynchronization signal from the ViewStation FX or VS4000. This is a signal indicating that the ViewStation FX or the VS4000 has lost video synchronization due to a network problem and requires that the cryptographic encoder/decoder resync with the equipment at the other end of the connection
To access the Crypto Resync Pulse screen:
1. Select System Info > Admin Setup > Security.
2. In the Security screen, select the Crypto Resync option.The Crypto Resync Pulse screen appears.
Figure 4-14. Crypto Resync Pulse Screen
You can configure the following options on this screen:
❑
Crypto Resync—This option is Off by default. To enable Crypto Resync, select On.❑
Time Between Pulses (sec)—This option lets you set the time between pulses (in seconds).❑
Pulse Width (millisec)—This option lets you set the pulse width (in milliseconds).If the system is in a call, and it loses H.320 synchronization, it continuously sends the resynchronization pulses at the specified rate with the specified pulse width until H.320 regains
synchronization.
The resync pulse is output on the RTS signal. If this feature is enabled, the RTS signal no longer functions as the Ready-To-Send signal.
Most installations that use encryption equipment require a custom cable. The cable should be designed to route the RTS signal from the system to the appropriate resync input on the encryption
equipment. The encryption equipment can get its RTS input from the system’s DTR output or by wiring this input to an always-high tie-off. In this non-dialed mode, the DTR output and RTS output act exactly the same.
Note
Refer to Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000 for more information on these signals.