Comtech EF Data Vipersat CDM-570L Manual de usuario descargar pdf (Pagina 2)

CDM-570-IPEN & CDM-570L-IPEN

Advanced Communication Solutions

MANAGEMENT

The modem supports SNMP, web-based and command line

interfaces for management. The modem can also be configured

and monitored from the front panel, or through the remote M&C

port (for non-IP mode of operation). Ten complete RF

configurations may be stored in the modem. An event log stores

alarm and status information in non-volatile RAM, while the Link

Statistics log stores link performance (Eb/No and AUPC

performance) for monitoring and reporting purposes.

E1 RAN OPTIMIZATION (POINT-TO-POINT)

Comtech EF Data’s RAN Optimization technology significantly

reduces the WAN (satellite) bandwidth required to carry an E1

bearer used for cellular backhaul. It provides the user complete

control over the desired level of optimization and link quality.

Depending on the traffic profile, typical bandwidth reduction of

30-35% can be achieved with little or no impact to the voice

quality. The WAN bandwidth can be reduced by as much as 60%

relative to the ingress data rate, allowing users to achieve

desired bandwidth savings and voice quality. The CDM-570/L-

IPEN provides usage statistics to assist with link monitoring.

E1 RAN optimization cannot be used simultaneously with the IP

Module.

G.703 CLOCK EXTENSION

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-IPEN offers a G.703 clock

extension option that propagates a high stability reference from

Hub to the Remote. This process does not require additional

bandwidth.

EDMAC & AUPC OPERATION

The CDM-570/L-IPEN has the ability to monitor and control the

distant end of a point-to-point satellite link using EDMAC or

EDMAC2. User data is framed and bits are added to pass control,

status, and AUPC information.

Automatic Uplink Power Control (AUPC) can be used to

automatically adjust the transmit power based on the Eb/No

feedback from the distant end modem.

EDMAC operation is transparent to the user.

VIPERSAT MANAGEMENT SYSTEM

• Dynamic SCPC carrier allocation & true bandwidth-on-demand

• User-defined policies for upstream carrier switching

• Star and full mesh capabilities using Single Hop On Demand

• Advanced switching takes advantage of using other

modulation/forward error correction combinations

• Guaranteed bandwidth capability

VMS Network & Bandwidth Management

A Vipersat-powered network integrates this advanced modem

with a powerful network management tool, the Vipersat

Management System (VMS). In addition to the traditional

monitoring and control of the CDM-570/L-IPEN modems,

CDD-564/LEN and CDD-562LEN demodulators, the VMS allows

these devices to share bandwidth, and when needed, switch

automatically to a dedicated SCPC channel.

In a Vipersat-powered network, the CDM-570/L-IPEN modem

takes advantage of its fast acquisition demodulation to allow it to

operate in a shared mode. Inbound transmissions (from remote to

hub) can be switched from a shared Selective Time Division

Multiple Access (STDMA) mode to a dedicated Single Carrier Per

Channel (SCPC) connection via a variety of user defined policies

or triggers. This enables the network to more effectively handle

real-time connection-oriented applications and reduces both

latency and network congestion. Through VMS, dynamic point-

to-point mesh connections can also be established between

remotes.

Upstream Switching

Through protocol classification in the remote terminals, the

modem initiates automatic switching. VMS establishes dSCPC

bandwidth based on policies that can be individually enabled on

a per-remote basis, or globally enabled. Policies can be

configured for a variety of applications such as VoIP, video

(VTC), or based on a load, or via a schedule, Type of Service

(ToS), or QoS rules such as IP port or IP address and protocol

type. Operators are able to set minimum and maximum data rates

for each remote as well as excess data rates for an initial

upstream switch.

Vipersat Operation Mode

Vipersat operation is enabled via a FAST feature code. Networks

can initially be deployed in fixed 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, modems 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

BPSK, Rate 5/16 Turbo FEC – Entry Channel Mode only.

Data Rate Range: 32 kbps to 937 kbps.

SCPC

All Turbo Product Code FEC rates as detailed in the

following specifications

FAST FEATURE ENHANCEMENTS

The 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.

SYSTEM SPECIFICATIONS

Frequency Range

CDM-570-IPEN: 50 to 90 or 100 to 180 MHz,

100 Hz resolution

CDM-570L-IPEN: 950 to 2000 MHz,

100 Hz resolution

Data Interfaces

10/100Base-T Ethernet, EIA-422/-530 DCE,

V.35 DCE, Sync EIA-232, G.703 T1 balanced

(option), G.703 E1 balanced or unbalanced

(option)

Data Rate Range

(See user manual for details)

2.4 kbps to 9.98 Mbps (depending on

Modulation, FEC and Framing), 1 bps step with

fully independent TX and RX rates

Modulation & FEC

Data Rate Range

5/16 BPSK TPC

2.4 kbps to 0.937 Mbps

21/44 BPSK TPC

2.4 kbps to 1.430 Mbps

1/2 BPSK

2.4 kbps to 1.500 Mbps

1/2 QPSK/OQPSK

4.8 kbps to 3.000 Mbps

3/4 QPSK/OQPSK

7.2 kbps to 4.500 Mbps

7/8 QPSK/OQPSK

8.4 kbps to 5.250 Mbps

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Comtech EF Data Vipersat CDM-570L Manual de usuario Pagina 2

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