Comtech EF Data IPSat GW1000 - Manual (Page 12)

01-0945-401 Rev. A 08/2004 2
Internet Protocol Encapsulator (IPE)
The IPE receives data from the hub IP network and encapsulates the data into a MPEG transport stream according to
DVB data broadcast specification EN 301 192.
Satellite Modulator DM-240
The DM-240 is ComStream's standard DVB-compliant satellite modulator. Connecting to the IPE, the input
interfaces include DVB SPI, ASI, M2P, and RS-422. The modulator accepts the input MPEG transport stream and
provides scrambling, FEC encoding, and modulation of the satellite carrier channel in accordance with DVB
specification EN 300 421.
Multiple Receiver Terminal (MRT)
The MRT is a 9 rack-unit chassis housing redundant, hot-swappable AC power supplies, L-band amplifiers and
distribution, and up to 12 SCPC demodulators.
The chassis includes integrated cooling fans and front panel LEDs showing status of all installed demodulators. The
demodulator cards are hot swappable and operate between 19.2 kbps to 8.448 Mbps, meeting the same performance
specifications as ComStream’s standard DBR2000 receiver. Each demodulator is connected to a Cisco router, which
provides a standard Ethernet interface to the hub Ethernet network for return channel traffic from remote stations.
Optional Equipment
Based on the system application, a network may require additional equipment including:
• MPEG video and audio encoders
• TCP optimization hardware
• Quality of service (QoS) or traffic-shaping hardware
• Basic network equipment
• Application servers