Network Technologies DVB-ASI to IP - Manual (Page 64)

ASI-IP-GTW User's Manual
Page 64
5.2.3 IP Receive Mode
In IP receive mode, the ASI-IP-GTW receives IP packets from the data
Ethernet interface. The ASI-IP-GTW will receive streams from different
sources. In the case of unicast, the ASI-IP-GTW will parse the IP stream
and send the transport stream to the ASI output which is configured
with the matching UDP port. In case of multicast, the ASI-IP-GTW will
send a join message to join the configured multicast. When reception is
disabled, the ASI-IP-GTW will send a leave message to the network.
For each transport stream, the reassembled MPEG-2 transport packets
are held in a buffer. The function of this buffer is to handle re-ordering
of packets, eliminate network jitter and support the adaptive rate
recovery.
After clock recovery, the MPEG-2 transport stream is passed to the
DVB ASI output port.
In the current version of the product, the ASI output will always output
188 byte packets. If you require 204 byte packets, please contact
Network support as this is likely to be available in a future software
version.
5.2.4 IP Bi-directional Mode
In IP bi-directional mode, half the ASI ports are operate as described in
IP transmit mode, while the other half are operated as described in IP
receive mode.
5.2.5 Management
The ASI-IP-GTW provides an Ethernet management port for
configuration and control of the unit. The management port has its own
IP address. This interface provides the following features:
o
WEB interface for remote control
o
SNMP for alarm and status monitoring (optional).
o
FTP for software and firmware updates
o
Telnet for engineering and debug purposes
In addition, the IP address of the management port can be set though
the RS232 connector.
The WEB interface is described in detail in Chapter 1. SNMP is an
option to the product. The unit will send SNMP traps to report alarm
conditions; in addition it is possible to read from the unit all active
alarms and trap history. The MIB is available on request.
5.2.6 Alarms
The ASI-IP-GTW indicates alarm or fail status to the user in four ways:
o
WEB interface
o
Alarm LED on the front and on the rear
o
SNMP traps to Network Management System
o
Alarm relay
The user can define the severity level of the different alarm events. The
three levels are No alarm, Warning and Critical.