SDH microwave system

High-speed networks,high-speed roll-out

MDRS 155 S Data Sheet

Marconi's MDRS 155 S is a cost-efficient, point-to-point, SDH microwave radio system,delivering exceptionally reliable bandwidth to access and trunk networks.

Key benefitsFrequency bands 7 GHz up to 38 GHz

STM-1 transmission

High spectrum efficiency through 128 MLQAM or high hop length through16 MLQAM with the same Outdoor Unit

Fast installation

Compact size

Fully SDH compatible

Universal network management access

Easy upgrade to protected STM-4

Branching of up to eight STM-1 on oneantenna

High reliability through several protectionoptions.

Major advances in technology, fallingequipment costs, and greatly enhancedquality and reliability (over 99.99%) havemade fixed radio one of the fastest growingaccess solutions today. Cheaper to deployand maintain than conventional solutions,wireless is also fast to install, giving new andexpanding operators direct access to thebackbone with a key competitive edge.

The MDRS 155 S is ideal for any applicationwhere a cable is not available, including fastmodification of network topology and rapidroll-out of supporting backbone for accessapplications such as 3G mobile. Suitable forsupporting any SDH application, its compactsize means it can be incorporated easily intoroadside enclosures.

TransmissionStandard transmission rate is STM-1 – via anelectrical or optical baseband interface – withthe option to upgrade to carry protectedSTM-4 transmission. Depending on thefrequency band and the ODU version, up toeight STM-1 signals can be transmitted viaone antenna.

Automatic Transmit Power Control (ATPC)ensures the use of the lowest possibletransmission power, with bit-error-free datatransmission guaranteeing a high frequencyreuse.

ATPC reduces the effects of co-channel andadjacent-channel interference andconsiderably reduces power consumptionunder normal conditions. Highly flexible andsoftware-controlled, it allows correction of up-fading and down-fading, and is easily adaptedto local conditions by configuring the best-received signal level and transmission power.

Depending on the frequency band and theODU type, a Cross Polarisation InterferenceCanceller (XPIC) allows for 128 MLQAMfrequency use on both polarizations,doubling the transmission capacity.

ProtectionVarious protection systems can beimplemented to meet the critical networksituation, such as 1+1 hot-standby, 1+1 lineprotection and 1+1 baseband interfaceprotection. The availability and quality of thetransmission link can be further increased viaspace and/or frequency diversity.

The microwave radio line protection switchingis independent of SDH network protectionswitching and is implemented as RegeneratorSection Protection. The control channelrequired for microwave radio protectionswitching is transported in a media-dependent byte of the Regenerator SectionOverhead. Any existing Multiplex SectionProtection (MSP) or Subnetwork ConnectionProtection (SNCP) are not affected.

Protection switching is activated by error-freepulses or early-warning pulses and alarmsignals.

Integrated 1+1 protection can be upgraded ton+1 or n+2 protection configuration using theDPU STM-4 module. Subsequent extensionsup to 4+2 or reductions back to 1+0 can beimplemented without interruption or link re-engineering.

If only one channel is available in thefrequency band, equipment protection can beoptionally implemented with a 1+1 hotstandby configuration.

Outdoor Unit (ODU)The compact ODU is connected to the IDU via a single coaxial cable up to 300 metres long.There are three ODU types: the high-performance ODU S for best system gain and bestspectrum efficiency (XPIC), the ODU LX and the ODU L. The following table shows thedifferences between these ODUs:

The ODU contains the transmission/receive amplifier and has integrated overvoltage protection,ensuring safe operation at all times. Hot-standby protection is simply achieved by connecting twoODUs to a single antenna via a low-loss switch or a coupler (symmetric or asymmetric).

Indoor Unit (IDU)The compact and lightweight indoor unit contains the major portion of the electronics. The use ofthe very latest technology, together with Marconi's expertise in large-scale integration, provides aworld-class solution which enables the major system features to be controlled electronically.

The shelf is a small 1.5 HE module that enables a rack installation in only 2HE, including therequired cabling.

Thermal management - which is highly critical for such compact devices – is performed by anintelligent thermal control subsystem, allowing other equipment to be placed directly below andabove the shelf. This subsystem protects the unit against damage in the event of overheating.

A fan module with a 1:2 fan-redundancy allows safe operation if a fault arises. A remotediagnostic facility reports faults to the network management system, where repair preparationcan be done remotely. The fan module can be replaced during operation, without trafficinterruption. These features make the equipment among the most reliable on the market.

ODU S ODU LX/L

System gain high LX: MediumL: Low

CCDP (XPIC) yes LX: yesL: no

Channel yes Nobranching

Antenna remote compact ormounting remote

System architecture

AntennaVarying from 0.15 m up to 4.0 m in height, the antenna incorporates the feeding system forboth dual- and single-polar operation. Marconi can assess, design, implement and maintainthe antenna system to ensure optimum performance. Lens, parabolic and shell antennae areavailable.

High Performance ODU S in a 4+0 configuration

High Performance ODU S in a 1+1 hot standby configuration ODU L in a 1+0 configuration with compact antenna mounting

Indoor Unit IDU 155-128 S/LS

ManagementSimple connections are made, via the STM-1 Section Overhead (DCCr or DCCm), the LAN interface (Q3, OSI or IP) or the QD2 interface, toMarconi's ServiceOn Access integrated network management system.

Using the DCCr or DCCm, the radio system automatically searches for, and establishes, the shortest path and the necessary redundancy tomaintain reliability under fault conditions. The open OSI protocol stack and the integrated multi-protocol stack (OD2, OSI and TCP/IP) allowadaptation on any SDH multiplexer or integration of any SNMP-managed equipment. This provides the radio with a simple plug-and-playmanagement solution, powered by ServiceOn Access – the comprehensive end-to-end network management solution which serves Marconi'sAccess portfolio.

Data summary

Modulation Type 16 MLQAM 128 MLQAMFrequency range 7 GHz: acc. to CEPT ECC/REC/(02)06 / ITU-R F.385 Annex 1 + 4

8 GHz: acc. to ITU-R F.386 Annex 1,3 & 411 GHz: acc. to CEPT ERC/REC 12-06 / ITU-R F.387 Annex 2-4, 5 13 GHz: acc. to CEPT ERC/REC 12-02 / ITU-R F.497 15 GHz: acc. to CEPT ECC/REC 12-07E / ITU-R F.63618 GHz: acc. to CEPT ERC/REC 12-03 / ITU-R F.59523 GHz: acc. to CEPT REC T/R 13-02 A / ITU-R F.637 Annex 326 GHz: acc. to CEPT REC T/R 13-02 B / ITU-R F.748 Annex 128 GHz: acc. to CEPT REC T/R 13-02 C / ITU-R F.748 Annex 232 GHz: acc. to CEPT ERC/REC/(01)02 / ITU-R F.1520 Annex 138 GHz: acc. to CEPT REC T/R 12-01 / ITU-R F.749, Annex 1

Antennae Depending on frequency band and antenna diameter, lens, parabolic and shell antennae are avaialble:7/8/11 GHz: 0.6, 1.2, 2, 3, 3.7 and 4 m 13 GHz: 0.6, 1.2, 2 and 3 m 15 GHz: 0.3, 0.6, 1.2, 2, and 3 m18/23 GHz: 0.3, 0.6, 1.2 and 2 m 26 GHz: 0.15, 0.3, 0.6 and 1.2 m 28/32/38 GHz: 0.15, 0.3 and 0.6 m

Transmission capacity N x 155 Mbit/s (STM-1), 622 Mbit/s (STM-4)Channel spacing 55/56 MHz 27.5/28 MHzOperating mode Adjacent-channel operation (ACCP) and co-channel dual operation (CCDP) with XPIC (for 128 QAM)3

System Values ODU S 18/23/26/28 GHz Transmit power ODU S (at A') 18/23/26 GHz: 21.5 dBm 18/23/26 GHz: 19.5 dBmwithout branching loss 28 GHz: 19 dBm 28 GHz: 17 dBmATPC range 15 dBBranching loss2 1+0, 1+1-LP 2.0 dBBranching loss2 RF-Switch: 1.4 dB1+1-HSB: 1+0 plus Symmetrical coupler: 6.2 dB

Asymmetrical coupler: 2.6/7.6 dBBranching loss2 N+0 (N≤8) 3.8 dB + Mx0.4 dB (up to M = 4) 4.6 dB + Mx0.4 dB (up to M = 4)Receive level (at A) without -77/-75 dBm -71.5/-69.5 dBmbranching loss, BER = 10-3/10-6

System Values: ODU LX 18/23/26/28/32/38 GHz 7/11/13/18/23/26/28/32/38 GHzODU L 7/8/11/13/15 GHz

Transmit power ODU L (at A) 7/8 GHz: 18 dBmWithout branching loss 11/13/15 GHz: 17 dBmTransmit power ODU LX (at A) 7 GHz: 19 dBmWithout branching loss 11/13 GHz: 20 dBm

18/23/26 GHz: 19 dBm 18/23/26 GHz: 17 dBm28/32 GHz: 17 dBm 28/32 GHz: 15 dBm38 GHz: 19 dBm 38 GHz: 16 dBm

ATPC range 15 to 20 dB1

Branching loss2 1+0, 1+1-LP ODU L: 7/15 GHz: 4.0 dBODU LX: 7/13 GHz: 4.0 dB

ODU LX: 18/23/26/28/32/38 GHz: 2.0 dB ODU LX: 18/23/26/28/32/38 GHz: 2.0 dBBranching loss2 1+1, ODU LX: symmetrical coupler 6.4 dB, assymmetrical coupler 2.8/7.8 dBHSB: 1+0 plus ODU L: symmetrical coupler 6.6 dB, assymmetrical coupler 3.2/8.3 dBBranching loss2 N+0, (N≤4) with coupler or different antennaeReceive level ODU L (at A) without 7/8 GHz: -73/-71 dBmbranching loss BER + 10-3/10-6 11/15 GHz: -73.5/-71.5 dBmReceive level ODU LX (at A) 7/13 GHz: -73/-71 dBmwithout branching loss, 18/23/26 GHz: -76/-74 dBm 18/23/26 GHz: -70.5/-68.5 dBmBER = 10-3/10-6 28 GHz: -76.5/-74.5 dBm 28 GHz: -71/-69 dBm

32/38 GHz:: -75.5/-73.5 dBm 32/38 GHz: -70/-68 dBm

New Century ParkCoventry CV3 1HJUnited KingdomTelephone: +44 (0)24 7656 2000Facsimile: +44 (0)24 7656 7000www.marconi.com

© Marconi Communications Limited 2005. All rights reserved.

This publication is issued to provide outline information only which (unless agreed by Marconi Communications Limited in writing) may not be used, applied or reproduced for any purposeor form part of any order or contract or be regarded as a representation relating to the products or services concerned. Marconi Communications Limited reserves the right to alterwithout notice the specification, design or conditions of supply of any product or service.

Marconi and the Marconi logo are trademarks of Marconi Corporation plc. Marconi Communications is a trademark of Marconi Communications Limited.

Code: L2252/A/0305 Produced by Marconi Creative Services (Liverpool) Printed in England

Data summary (continued)

Baseband Interface STM-1 electrical: CMI-coded, according to ITU-T G. 703, coaxial 1.6/5.6STM-1 optical: S-1.1, according to ITU-T G.957, LC-Duplex (adaption to SC(PC), DIN or E2000)STM-4: S-4.1, (via DPU STM-4), according to ITU-T G.957, SC(PC), DIN or E2000)

Service Channels 2xE1, 2xF1 each 64 kbit/s codirectional synchronous according to ITU-T G.703, RJ-45additionally up to 4 x 64 kbit/s codirectional synchronous according to ITU-T G.703, RJ-45

Auxiliary Channels 1 x 2 Mbit/s, 120 Ohm, according to ITU-T G.703, RJ-45External Device Interface 10x input and 3x output, TTL-level, RJ-45; output 1 and 2 assigned as INT A and INT B alarmsEngineering Orderwire Interfaces 2x Orderwire Channel (E1), PABX, phone, ExtEOW, each RJ-11 additionally 2x 64 kbit/s,

acc. to G.703, RJ-45Protection Switching 1+1 hot standby (HSB), 1+1 line protection (LP), 4+2 line protection with DPU STM-4

frequency and space diversityManagement Local Maintenance Terminal (LMT) or ServiceOn Access (SOA)Management Interfaces QD2: RS-485 interface usable as QD2-Master or -Slave, RJ-45

LAN: 10Base-T interface supporting OSI or/and IP, RJ-45LMT: RS-232 interface, RJ-45DCCr or DCCm: STM-1 integrated management channels according to G.774

Integrated Management QD2 (integrated SISA-V, remote connections using OSI routing), OSI routing (ES-IS, IS-IS LI, IS-IS L2)Routing Protocols Static IP routing (IP-Bridge, up to 10 static links configurable), dynamic IP routing (OSPF V2, RFC 2327)Power Supply -48/60 V (+/- 25%) DC; according to ETSI 300 132, Sub-D, redundant inputPower Consumption 60 to 90 W per data streamTemperature Range ODU S and ODU LX: -45 to +45 (55)0C, acc.to ETSI EN300019, cl. 4.1E

ODU L: -33 to +40 (55)0C, acc.to ETSI EN300019, cl. 4.1IDU: -5 to +450C, acc.to ETSI EN300019, cl. 3.2

Mechanical Dimensions ODU S W: 120 mm, H: 340 mm D: 387 mm <8 kgODU LX: W: 260 mm, H: 303 mm D: 105 mm <4.5 kg1

ODU L: Diameter: 267 mm, D: 89 mm <4.6 kgIDU: W: 435 mm, H: 67 mm D: 228 mm <4.5 kg

1 Preliminary data2 Rx and Tx without losses in the waveguide network3 With ODU S and ODU LX