Comtech EF Data CDM-570/570L Vipersat - Manual (Page 69)

Chapter 3 - Using the Command Line Interface (CLI) 3-33
Vipersat Configuration
Note that Auto Switching must be Enabled on a Hub STDMA Controller that is
configured for Entry Channel mode.
Current WAN Transmit Mode
The Current WAN Transmit Mode item is for information only and reflects
the current status (STDMA mode or SCPC mode) of the CDM-570/570L. If the
CDM-570/570L is functioning as a Hub in the network, this item will always
read Continuous as shown in figure 3-40. If the CDM-570/570L is functioning
as a Remote in the network and STDMA is enabled, this item will show
STDMA (Burst) when in STDMA mode, as shown in figure 3-41, or Continu-
ous when switched out into SCPC mode.
Tip: This menu item is useful for determining whether a Remote modem is
currently operating in STDMA or SCPC mode.
Voice & Video Application Switching
One of the four automatic switching functions that the Vipersat CDM-570/570L
is able to perform is Application Switching. The Vipersat CDM-570/570L
provides application switching for non-encrypted SIP and/or H.323 traffic that
is detected on the satellite network. When encryption prevents the detection of
this type of traffic, an alternate means of SCPC switching can be configured
using the ToS auto switching feature.
Detection of the voice and video traffic occurs in the Remote modem classifier,
which looks at traffic that is passed in both directions (Hub-to-Remote and
Remote-to-Hub). Once the Voice and Video Switch Detection features are
enabled, the Remote modem will send an Automatic Switch Request (ASR) to
the VMS when an SIP and/or H.323 call is detected. The ASR contains the
destination IP address of the RTP packets. If available hardware and bandwidth
exist, the VMS will establish the SCPC carrier automatically.
Note: Application switching (Voice and Video) must be Enabled for each
CDM-570/570L in a network that is going to perform Application switch-
ing in order for the VMS to dynamically optimize network circuit parame-
ters to accommodate these applications.
Load switching by the VMS is not affected by this setting.
Voice Switch Detection
This menu item appears for Remote modems only.
Voice Switch Detection is one of the Application switching commands that
provides for a dedicated SCPC connection when an SIP and/or H.323 voice call
is made over the satellite network.
NOTE