Microwave Data Systems MDS entraNET 2400 Spezifikationen

System GuideExtended RangeIP Networking TransceiversMDS entraNET Microwave Data Systems Inc. Access PointSerial RemoteEthernet Remote MDS 05-4055A01

2 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ALANCOM1COM2PWRLINK

92 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AVER[VER, SWID1=, SREV1=, XSREV1=, SWID2=, SREV2=, XSREV2=, IMAGE=<im-age>, RADIOSW=, H2H=

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 934.2 UPGRADING REMOTE FIRMWAREA Remote radio’s firmware may be upgraded using the Windows-based

94 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A• Perform Upgrade—Click this button to begin the upgrade process.• Status—Shows the action bein

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 955SAMPLE CONFIGURATIONS5 Chapter Counter Reset ParagraphContents5.1 INTRODUCTION ...

96 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ALANCOM1COM2PWRLINK

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 975.1 INTRODUCTIONThis chapter provides details of how radios should be configured and connected

98 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A5.1.2 IP-to-Remote Serial Application ExampleThis configuration makes any data sent or received

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 995.1.3 Point-to-Point, Serial-to-Serial Application ExampleOnce the transceivers are configured

100 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A5.1.4 Point-to-Multipoint Serial-to-Serial Application ExampleThe operation and data flow for

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1015.1.5 Mixed Mode Application ExampleIn this configuration, the Host PC can use both TCP and Se

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 3 1.1 PRODUCT DESCRIPTION This manual presents installation and operating instructions for the M

102 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ATable 5-6. Serial Port Application Configuration MDS entraNET 900Unit LocationMenu Item Setti

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1036INSTALLATION6 Chapter Counter Reset ParagraphContents6.1 INSTALLATION ...

104 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ALANCOM1COM2PWRLINK

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1056.1 INSTALLATIONThis section provides tips for selecting an appropriate site, choosing an ante

106 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AInvisible place holderFigure 6-3. Mounting Brackets Spacing—Remote6.1.2 Site SelectionSuitable

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 107– 90 dBm provide a “fade margin” of 15 dB to account for variations in signal strength that ma

108 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AInvisible place holderFigure 6-5. Typical Yagi Antenna (mounted to mast)FeedlinesThe choice of

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 109Table 6-2 outlines the minimum lengths of RG-214 coaxial cable that must be used with common M

110 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AIn general, keep the following points in mind when setting up your com-munications network.1.

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1116.1.7 How Much Output Power Can be Used?The transceiver is normally supplied from the factory

4 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A apply power, set a few operating parameters and you are done. No license is required for opera

112 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A* Most antenna manufacturers rate antenna gain in dBd in their litera-ture. To convert to dBi

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1136.2 dBm-WATTS-VOLTS CONVERSION CHARTTable 6-4 is provided as a convenience for determining the

114 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ALANCOM1COM2PWRLINK

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1157TROUBLESHOOTING &RADIO TESTS7 Chapter Counter Reset Paragraph7.1 TROUBLESHOOTING...

116 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ALANCOM1COM2PWRLINK

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1177.1 TROUBLESHOOTINGSuccessful troubleshooting of a wireless system is not difficult, but requi

118 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. Aresolving common system difficulties using the LEDs, and Table 7-3 other simple techniques. Ta

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 119good source of information that may be used remotely to provide pre-liminary diagnostic inform

120 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AThe following is a summary of how several screens in the entraNET Management System can be use

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 121pected. Blocking these zones may eliminate or reduce harmful interference. (See “Skip Zone Opt

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 5 • Low Power Consumption—Sleep and Shutdown modes to enable solar-powered operation• Single Rad

122 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AThese various events are stored in the transceiver’s “Event Log” and can be a valuable aid in

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 123RSSI accurately reflects any change in the link signal strength. The higher the indication (les

124 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ALANCOM1COM2PWRLINK

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1258TECHNICAL REFERENCE8 Chapter Counter Reset ParagraphContents8.1 DATA INTERFACE CONNECTORS..

126 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ALANCOM1COM2PWRLINK

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1278.1 DATA INTERFACE CONNECTORSThree types of data interface connectors are used on entraNET tra

128 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A8.1.2 COM1 Port (AP, Remotes)A PC may be connected to the Remote transceiver’s COM1 port (RJ-1

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1298.2 TECHNICAL SPECIFICATIONSGENERALTemperature Range: –40° C to +70° C (–40° F to 158° F)Humid

130 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ARemote Radios: • Command line via COM1 portDATA CHARACTERISTICSPORTS (AP):Ethernet:Interface C

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 131Occupied Bandwidth: 200 kHzRECEIVER:Type: Double conversion superheterodyneSensitivity: –105 d

6 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. Amore associated Remote units, as shown in Figure 1-2 on Page 6. A LAN provides communications b

132 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ALANCOM1COM2PWRLINK

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1339DEFINITIONS OF TERMS9 Chapter Counter Reset Paragraph10 Chapter Counter Reset ParagraphIf you

134 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AdBm—Decibels referenced to one milliwatt. An absolute unit used to measure signal power, as in

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 135movement or changing atmospheric losses. A fade margin of 15 to 20 dB is usually sufficient in

136 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. Apose of gathering telemetry data. Figure 1-2 on Page 6 shows an example of an MAS system.MCU—M

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 137connected to an access point can be turned off, moved to another place, turned back on, and wh

138 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ASTP—Spanning Tree ProtocolStanding-Wave Ratio—See SWR.SWR—Standing-Wave Ratio. A parameter rel

IN CASE OF DIFFICULTY...MDS products are designed for long life and trouble-free operation. However, this equipment, as with all electronic equipment,

Microwave Data Systems Inc.Rochester, NY 14620General Business: +1 585 242-9600FAX: +1 585 242-9620Web: www.microwavedata.com175 Science ParkwayA prod

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 7pendent and the transceiver provides seamless simultaneous operation as shown in Figure 1-3. Inv

8 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. Afor EIA-232 signaling. The COM2 port supports standard EIA-232 sig-naling and acts as a data-com

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 91.3.1 Intrusion Detection via SNMP Traps(Available soon)In addition to the operative tools and t

10 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ATable 1-3. AccessoriesAccessory Description MDS Part No.AC Power Adapter KitA small power suppl

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 112 TEST SETUP AND EVALUATION2 Chapter Counter Reset ParagraphContents2.1 INTRODUCTION ...

12 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ALANCOM1COM2PWRLINK

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 132.1 INTRODUCTIONPrior to field installation, it is recommended that the radio system be set up

14 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AInvisible place holderFigure 2-1. Access Point Interface ConnectorsFigure 2-2 shows the interfa

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 15Invisible place holderFigure 2-3. Serial Remote Interface Connectors2.2 STEP 1—CONNECT THE ANTE

16 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ANOTE: It is very important to use attenuation between all units in thetest setup. The amount of

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 172.4 STEP 3—CONFIGURE THE TRANSCEIVERS2.4.1 Access Point ConfigurationThe Access Point must be c

18 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A5. Repeat Steps 1–4 for any other AP units in your radio system.NOTE: The Management System sup

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 19Invisible place holderFigure 2-7. Remote Configuration SetupLog inFollow these steps to login t

20 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AThis concludes the basic setup of a Remote radio. A full listing of Remote programming commands

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 21• LAN/ETH (Ethernet units)—On or blinks intermittently • COM2—Blinks to indicate data communica

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide i Contents 1 INTRODUCING THE entraNET SYSTEM ... 1 1.1 PRODUCT DESCRIPTION...

22 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AInvisible place holderFigure 2-8. Ping Test Setup(To test connectivity between an AP and an Eth

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 233AP MANAGEMENT3 Chapter Counter Reset Paragraph3.1 INTRODUCTION ...

24 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ARemote Management Menu...52Remote Databa

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 253.1 INTRODUCTION The MDS entraNET 900 AP is equipped with an embedded manage-ment system that i

26 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AInvisible place holder• Spacebar used to make some menu selections• Bolded items indicate a men

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 27Invisible place holder• Spacebar used to make some menu selections• Bolded items indicate a men

28 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A3.1.2 Differences in the User InterfacesThere are slight differences in navigation between Teln

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 293.1.3 Accessing the Embedded Management SystemThe menu-based management system provides access

30 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AProcedure with Terminal Emulatora. Connect a computer’s serial communications port to the trans

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 31d. A login screen will be displayed that requires a user name and password to access the Manage

ii MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AEthernet Remotes...

32 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A3.1.5 Logging Out of the entraNET Management SystemNOTE: To maintain security, it is best to fo

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 33played, an “A)” will appear to the left of the Device Status field as seen in Figure 3-6. Press

34 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A• Local Serial Configuration—Tools to configure the COM1 and COM2 serial port of the AP. (See “

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 35Invisible place holderFigure 3-8. Network Configuration MenuFrom Access PointThis menu is subdi

36 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A3.3.2 IP Configuration MenuFigure 3-9. IP Configuration Menu• IP Address (User Review Recommend

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 373.3.3 Wireless MAC Configuration• Radio Net(work) Address (User Review Required)—ID of the net

38 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A• BSP Routing Enable—This parameter enables intra-cell and routing of Basic Serial Protocol pac

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 39• SNMP v3 Priv Password—Privacy password stored in flash memory. Used when the SNMP Agent is ma

40 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A• Bridge Forward Delay—This value decides how long a bridge will spend in the “learning” and “l

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 41• Broadcast Repeat Count—Sets the number of times point-to-multipoint messages will be transmit

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide iiiRemote Database Menu...

42 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A3.5 CONFIGURING THE SERIAL INTERFACES3.5.1 OverviewTo understand the operation of the radio sys

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 43To configure IP-to-remote serial services, use the Remote Serial Gateway menu (Figure 3-20 on P

44 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A3.5.2 Serial Data Port Configuration Menu(Local Serial-to-Remote Serial, or IP-to-Local Serial)

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 45The Serial Configuration Wizard consists of a series of screens used to set all of the paramete

46 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AThe following text explains the key settings for the serial configuration menus.• Port Status—E

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 47• Inter-Packet Delay— Number of characters that rep-resent the end of a message (inter-characte

48 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. Ahost) the RSG will revert to its configured IP address and port for upstream data destined for

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 493.6 SECURITY CONFIGURATIONThere are many options for assisting you in providing secondary secu-

50 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A• HTTP Access—Prevents remote access through HTTP (Web browser) on Port 80 [Enabled/Disabled; D

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 51 Figure 3-22. Approved Remotes List Menu• Add Remote—Enter the serial number of Remote.[ten-dig

iv MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A5.1.4 Point-to-Multipoint Serial-to-Serial Application Example ...

52 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. Awhich is related to Remotes, is not actually sent to Remotes, but is stored in a local database

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 53Figure 3-24. Remote Management MenuWhen “Manage Selected Remote” is chosen, the screen shown in

54 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A• Serial Configuration—Tool for configuring COM1/2 parameters, including: Port Mode, Baud Rate,

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 55• RX Pkts—Number of packets received from this Remote.• Num EPs—Number of endpoints connected t

56 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A• RxPkts—Over-the-air data packets received by the transceiver. and passed on to the endpoint d

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 57Invisible place holderFigure 3-29. Statistics/Event Log Menu (Main Screen)• COM1/2 Serial Data

58 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A3.8.1 COM1 & 2 Serial Data Statistics Menus(See Figure 3-30)Invisible place holderFigure 3-

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 59Figure 3-31. Serial Data Statistics Screen (Verify as latest screen)(Both COM1 and COM2 are sho

60 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AFigure 3-32. Sample Packet Statistics Menu (Ethernet shown)Wireless Packet Statistics• Packets

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 613.8.4 Radio Packet StatisticsThe previous screen dealt with Ethernet-related information. The R

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide v Copyright Notice This publication is protected by U.S.A. copyright law. Copyright 2003, Microw

62 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. Aevents. These will cause the unit to enter an “alarmed” state and the POWER LED to blink until

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 63Invisible place holderFigure 3-35. View Event Log Menu• Clear Log—Purges the log of all stored

64 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A3.9 DEVICE INFORMATION MENUFigure 3-36 is the menu/screen that displays basic administrative da

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 65Device Names MenuFigure 3-37. Device Names Menu• Device Name—Device Name, used by the transceiv

66 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AFigure 3-38. Maintenance/Tools Menu3.10.1Reprogramming MenuThe AP transceiver has two copies of

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 67• Firmware Filename—Name of file to be received from the TFTP server.[Any 40-character alphanum

68 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A• Web Browser—Connect to the transceiver using a Web browser on a local PC connected directly t

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 69Invisible place holderFigure 3-41. Upgrade Configuration—Option 2(TFTP Server and Firmware File

70 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A5. Pull the firmware file through the TFTP server into the entraNET unit.(Main Menu>Maintenanc

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 71• TFTP Timeout—Time in seconds the TFTP server will wait for a packet ACK (acknowledgment) from

vi MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A The transceiver has been recognized for use in these hazardous locations by two independent a

72 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. Ato appear below associated parameter lines. Some of the values used in the calibration of the u

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 73The contact person regarding this unit.Description: Link to Campus ServerA brief general descri

74 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ASkipped Hop Zone4: ActiveSkipped Hop Zone5: ActiveSkipped Hop Zone6: ActiveSkipped Hop Zone7: A

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 75Com1 Serial Data Mode: UDPIP Protocol for COM1 data modeCom1 Serial Data Baud Rate: 9600Baud ra

76 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ASNMP Enable: disabledEnable/Disable SNMP AgentApproved Remotes List Enable: disabledSetting to

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 77• Change only the parameter values.• Capitalization counts in some field parameters. (Example:

78 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A3.10.4Authorization Keys MenuFigure 3-44. Authorization Keys Menu• Authorization Key—Initiate t

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 794REMOTE RADIOMANAGEMENT4 Chapter Counter Reset ParagraphContents4.1 INTRODUCTION 814.1.1 Pr

80 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ALANCOM1COM2PWRLINK

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 814.1 INTRODUCTIONThe configuration of Remote transceivers is performed through a PC terminal con

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 1 1 INTRODUCING THE entraNET SYSTEM 1 Chapter Counter Reset Paragraph Contents 1.1 PRODUCT DES

82 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ACommand ResponsesThe transceiver supports two command response formats—standard (plain language

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 834.1.4 Detailed Command DescriptionsHELP Lists commands supported for the current user login lev

84 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AAPx= —AP units, where x = 1 to 10. Sets / displays the serial number for one of 10 approved APs

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 85FORMAT=<format>—Sets / displays data characters, parity, and stop bits setting of the COM

86 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. A7E2—7 char bits, even parity, 2 stop bits8N1—8 char bits, no parity, 1 stop bit (Default)8N2—8

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 87OWNER=<owner>—Sets/displays owner information string. Owner can program any information (

88 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. AENCRYPT[MODE=<mode>, PHRASE=<phrase>, CMD=<cmd>]This command sets / displays

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 89HELP Lists commands supported for the current user login level.LOG[CLEAR, SHOW, TOTAL=, CMD=<

90 MDS entraNET 900 System Guide MDS 05-4055A01, Rev. ARADIO[UNIT=<unit>, NETADDR=<netaddr>, PWR=<pwr>, SYNC=, RSSI=, CONN=<conn&

MDS 05-4055A01, Rev. A MDS entraNET 900 System Guide 91cases where power consumption must be kept to a minimum, such as in solar-powered installations