The CDM-570 and the CDM-570L are Comtech EF Data's entry-level satellite modems that provide industry leading performance and flexibility in a 1 RU package at a very competitive price. It is the platform of choice for Network Operators, Enterprise users, Service Providers, Broadcasters and Government users for a wide range of applications - Cellular Backhaul over IP, Voice-over-IP (VoIP), LAN/WAN connectivity, Satellite News Gathering (SNG), Communication-on-the-Move, Maritime, Offshore applications etc.
Designed to address the market for low-cost terminals, the modems are available with 70/140 MHz or L-Band IF and EIA-530/-422, V.35, EIA-232 and G.703 data interfaces. An optional Internet Protocol (IP) Module with 10/100BaseT Ethernet port is available for IP centric applications.
The advanced FPGA-based architecture along with the internal Flash memory allows for easy field upgrades via the Ethernet port.
Key Features
The optional Turbo Product Codec delivers significant performance improvement when compared to Viterbi with concatenated Reed-Solomon. It offers increased coding gain, lower decoding delay, and significant bandwidth savings compared to traditional FEC. | EDMAC & AUPC Operation CDM-570/L has the ability to monitor and control the distant end of a satellite link using EDMAC. User data is framed and bits are added to pass control, status, and AUPC information. This is transparent to the user. ManagementThe modem can be configured and monitored from the front panel, or through the remote M&C port. Ten complete configurations may be stored in the modem. An Event log stores alarm and status information in nonvolatile RAM, while the Link Statistics log stores link performance (Eb/No and AUPC performance) for monitoring and reporting purposes. The CDM-570/L also offers a 10/100BaseT Ethernet port for management with an embedded Web Server (HTTP), SNMP agent, and Telnet capability. IP Module and Vipersat Networks VMSWith the optional IP Module, the CDM-570/L provides advanced features for IP networking including Quality of Service (QoS), Header and Payload Compression. Optionally, it can also be integrated with the Vipersat Management System (VMS) to provide fully automated network and capacity management. |
Cellular networks require precise synchronization of base stations, which is a challenge when using IP backhaul. Most operators are forced to use GPS based external equipment for site synchronization.
CDM-570/L offers a G.703 Clock Extension option that propagates a high stability reference from Hub to the Remote. A high stability E1/T1 reference signal is fed to the Hub modem. The Remote modem generates a T1/E1 signal synchronized to the reference signal that is then used for synchronizing the Remote site. G.703 Clock Extension can be used with the IP Module or when using serial synchronous data interfaces. This process does not require additional bandwidth.
Fast Feature EnhancementsThe FAST codes make it easy to upgrade the modem capability in the field. New features can be added on site, using FAST access codes purchased from Comtech EF Data that can be entered via the Front Panel.
With its innovative architecture and support for advanced capabilities, an IP-Module equipped CDM-570/L allows for efficient IP networking and transport over satellite links. It supports a wide range of applications and network topologies.
Key Features
Configurable on a per route basis, 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 also be reduced by 10% via IP/TCP header compression. Payload Compression OptionConfigurable on a per route basis, Payload compression can reduce the required satellite bandwidth by up to 40%. | Data Encryption Option Configurable on a per route basis, the IP Module supports 3xDES data encryption to prevent unauthorized access to data transmitted over the satellite link. Quality of Service (QoS) OptionThe IP Module supports multi-level QoS to reduce jitter and latency for real time traffic, provides priority treatment to mission critical applications and allows non-critical traffic to use the remaining bandwidth. Supported modes are:
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