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Digital Microwave Systems

HOME > Products & Solutions > Digital Microwave Systems

Comba Digital Microwave System (DMS) is a point-to-point digital microwave solution providing a wireless radio

links operating at microwave frequencies between two points. Where fiber/cable infrastructure cannot be

built, Comba allows transmission links to be established rapidly to realize cost savings and enabling rapid networks

rollouts.

Consisting of Indoor Unit (IDU), Outdoor Unit (ODU) and

Network Management System (NMS), Comba DMS supports

data rates from 4Mbps to 155Mbps across 7GHz to 26GHz

frequency ranges.

The DMS product lines are comprised of IP, SDH and PDH

equipment and include:

* PDH (PDH Radio System)

* Super PDH (TDM/IP Radio System)

* SDH (STM-1 SDH Radio System)

* IP (Native IP Radio System)

Comba DMS provides the high reliability with more than 99.999% availability. It is easy to manage, and fully

integrated into the Comba network management system.

Applications

The unique architecture of Comba DMS makes it ideal for deployments in a variety of applications such as mobile

network backhaul applications and fixed services applications.

Lower frequency coverage provides the ability to cover long distances over difficult terrain, and higher frequencies

are suited to short-distance urbandeployments as a fiber/cable alternative for backbone or access traffic.

* Mobile Communication Network

For 2G and 2.5G backhaul, Comba PDH systems are used by carriers to interconnect base transceiver stations

(BTS), and high-capacity SDH/SONET radios to āinterconnect base station controllers (BSC).

For 3G backhaul, our low/medium-capacity PDH systems interconnect UMTS mobile base stations (Nodes B), while

our high-capacity SDH systems interconnect UMTS radio node controllers (RNC).

* Fixed Service Network

Comba DMS supports IP network, LAN and WAN, with integrated voice and data transmissions over the same

microwave link. A typical application would be for an enterprise with a branch office located at some distance from

the main premise.

* Private Communication Network

Comba DMS is also used to provide communications links for private networks. For companies requiring frequent

communications into areas without extensive telecommunications infrastructure or in areas where the cost of local

access is high, installing and maintaining a Comba DMS can be very cost effective.

* Backup Communication Network

Microwave radio networks do not suffer from the long periods of outrage which often occurs when a fiber optic

cable is cut. Comba DMS is a viable secure and reliable alternative to protect mission critical communication

services.

* Broadcast Contribution/Distribution Network

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With the implementation of terrestrial digital broadcast, Comba DMS is an excellent alternative for carrying both

contribution and distribution services. Whether the network is PDH, SDH or IP-based, Comba DMS will provide

reliable and high performance transmission of the DAB/DVB signals.

Key Features and Highlights

* Broad frequency coverage (all ITU frequency bands, from 7-26GHz)

* E1, STM-1, Fast Ethernet tributary interface options

* Data Compatibility

With field-replaceable plug-in modules for IP interfaces, Super PDH provides extremely cost-effective 100 Base-T

transport, with a duplex throughput of up to 100 Mbps, to provide superior error performance for the transport of

data-orientated ATM or IP data.

* Powerful Configuration Options

Configuration options for high availability 1+1 hot standby, space and frequency diversity for protection of traffic

over challenging paths. Choice of standard or high power options, with Automatic Transmit Power Control (ATPC).

* Compact and split-mount architecture

Lightweight and compact size simplifies site acquisition and installation. Small footprint avoids complicated cabling,

as one indoor unit is capable of supporting several outdoor units.

* Fully integrated into Comba network management system for end-to-end network visibility and system

management

* Cost Effective Deployment and Maintenance

Features designed to enhance ease of use for installation, commissioning and maintenance, such as simple

front-panel controls, advanced loopback options, SNMP Network Management, and performance monitoring to

ITU-T Rec. G.821/826.

l Complies with all relevant ITU-R, ITU-T, and ETSI standards

ODU IDU

Frequency Band Frequency Range

6GHz 5.925-7.110

7 GHz 7.10-7.9

8GHz 12.80-13.20

13 GHz 14.50-15.30

15 GHz 17.70-19.70

18 GHz 21.20-23.60

23 GHz 24.20-23.60

Product Line Capacity Interface

PDH

2×E1

4×E1

8×E1

16×E1

16×E1+Wayside E1

(ETH optional)

Balanced(RJ45)

Unbalanced(BNC)

Super PDH

14×E1+4×ETH

32×E1

32×E1+4×ETH

(66Mbps)

E1:DB78

IP:RJ45

SDH STM-1Electrical

Single-mode Optical

IP34Mbps

100MbpsIP:RJ45

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