Comtech EF Data CDD-562L IP Demodulator
Features for Each Demodulator
- 950 to 2250 MHz or IF Input 70/140 MHz
- 16 kbps to 9.98 Mbps data rate
- Fast acquisition demodulator
- QPSK modulation (8-PSK, 16-QAM optional)
- 2nd Generation Turbo Product Coding (TPC) forward error correction
- LNB support: 10 MHz reference and LNB power
CDD-562L Standard Features
- Static IP routing for unicast and multicast
- Management via SNMP, Web or Telnet
- IGMP v1and v2
- Support for Point-to-Point, Point-to-Multi-Point and hybrid network topologies
- 10/100 BaseT Ethernet data interface (RJ-45)
- Firmware upgrade via FTP
- FAST feature upgrades at the factory or in the field
- Front Panel LEDs for Unit Status, Stored Event and the status of each of the two receive channels
- Interoperable with the CDM-570/L with IP Module, CDM-IP 550, and CDM-IP 300L
Comtech CDD-562L Dual IP Demodulator
The CDD-562L is an integrated dual IP demodulator, capable of receiving 2 independent L-Band channels and combining the output into a single 10/100BaseT Ethernet port for transmission onto the LAN. The 2 demodulators and the integrated IP Module are housed in a 1RU chassis. CDD-562L is designed to operate with Comtech EF Data’s IP-enabled products including modems and Performance Enhancement Proxies
Quality of Service (QoS)
The CDD-562L transparently passes the QoS prioritization established at the transmit end by the CDM-570/L.
Header Decompression Option
Header compression reduces the bandwidth required for Voice over Internet Protocol (VoIP) by as much as 60%. Example: A G.729 voice codec, operating at 8 kbps, requires 32 kbps bandwidth once encapsulated into an IP/UDP/RTP frame. With IP/UDP/RTP header compression, the same voice call needs only 10.8 kbps total WAN satellite bandwidth. Typical Web/HTTP traffic can be reduced by 10% via IP/TCP header compression. Each demodulator can be independently configured for header decompression.
Payload Decompression Option
Payload compression can reduce the required satellite bandwidth by up to 40%. Each demodulator can be independently configured for payload decompression.
Data Decryption Option
The CDD-562L supports 3xDES data decryption to prevent unauthorized access to data over the satellite link, and is configurable on a per demodulator basis.
The CDD-562L simplifies hub installations by reducing rack space and costs by providing two independent demodulators in a 1RU chassis. A bank of CDD-562L demodulators is ideal for a STAR topology network consisting of a shared outbound carrier with multiple return carriers from the remote sites.
At remote sites, the CDD-562L enables mesh connectivity between multiple sites. Operating in mesh topology with direct links between sites eliminates double-hop through the hub, thereby conserving bandwidth and reducing latency.
A Vipersat powered network integrates this advanced demodulator with a powerful network management tool, the Vipersat Management System (VMS). In addition to the traditional Monitoring and Control of the CDM-570/L modems, CDD-564/L and CDD-562L demodulators, the VMS allows these devices to share bandwidth, and when needed, switch automatically to a dedicated SCPC channel.
VMS provides for dynamic bandwidth allocation while in SCPC mode, automatically altering the bandwidth based on traffic conditions. This effectively enables the network to better handle connection oriented applications and reduce network congestion, jitter and latency. The VMS also allows for dynamic point-to-point mesh connections to be established between remotes.
CDD-562L Vipersat Operation Mode
Vipersat operation is enabled via a FAST feature code. Networks can easily start off in point-to-point or point-to-multipoint configurations. As the network grows and users wish to take advantage of the bandwidth on demand savings by implementing a Vipersat network, demodulators can easily be upgraded to Vipersat mode. Vipersat mode provides for the ability to operate in the following modulation/FEC rates:
|STDMA||QPSK, Rate 3/4 Turbo FEC – all STDMA modes.|
Data Rate Range: 64 kbps – 4.5 Mbps
|SCPC||All Turbo Product Code FEC rates as detailed herein|
CDD-562L Block Diagram
|Country of Manufacture||United States|
|Manufacturer||Comtech EF Data|
|Input Power||100 - 240 VAC, -48VDC|
|Max Data Rate||9.98 Mbps|
|Max Symbol Rate||3.0 Msps|
|Modulation||BPSK, QPSK, 8PSK, 8QAM, 16QAM|
|Output Frequency||70 MHz, 140 MHz, 950 - 2250 MHz|
|Dimensions||1.75" x 19" x 17.3"|