YDI Wireless CX-DS3-ETH-24 Users Manual

Link CX-24 User’s Manual

Table 2.6 – Electrical Connection Checklist

Checklist Item Verified Inspector Date

Is the proper voltage supplied to the Link CX-24 (PWR/LCL ALM LED on)?

Is the Link CX-24 receiving signal from the radio link (RF LINK LED on)?

When the Link CX-24 is connected to DS-3 or equipment, is the Link CX-24 receiving the expected signal (DATA LED on)?

When the Link CX-24 is connected to Ethernet equipment on port ETHERNET 1, is the Link CX-24 receiving the expected signal (ENET 1 LED on or flashing)?

When the Link CX-24 is connected to Ethernet equipment on port ETHERNET 2, is the Link CX-24 receiving the expected signal (ENET 2 LED on or flashing)?

The next series of acceptance tests requires you to log in to the built-in web server with a computer equipped with a web browser.

52 Connect your computer to the Link CX-24 through the Ethernet equipment connected to the

ETHERNET 1 or ETHERNET 2 port.

53 Log in to the Link CX-24 built-in web server to display the Monitor page as described in Section

2.10.2.

54 Make sure the Automatic Tx Power Control indicated in the lower half of the Monitor page is set to

Disabled.

55 Record the RSSI indicated at the top of the Monitor page. Save this number for later troubleshooting.

56 If you are acceptance testing DS-3 versions of the Link CX-24, continue with Step 57. If you are

acceptance testing Ethernet versions of the Link CX-24, continue with Step 58.

Testing DS-3 Link CX-24s

57 Go to the Test page and verify that the Link CX-24 passes the tests in Table 2.7.

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Table 2.7 – DS-3 Internal Circuit and Radio Link Checklist

Checklist Item Verified Inspector Date

Does the Link CX-24 input circuitry and DS-3 cabling work properly? (Set up Local + Remote Loopback and verify that the DS-3 equipment is receiving the loopedback signal it is transmitting to the Link CX-24.)

Does the Link CX-24 radio circuitry work properly? (Set up Radio Loopback and verify that the DS-3 equipment is receiving the looped-back signal it is transmitting to the Link CX-24.)

Do the near-end and far-end Link CX-24 radio circuits and radio paths work properly? (Set up BER Test and verify that the near-end Link CX-24 is receiving the looped-back BER test signal it is transmitting to the farend Link CX-24.)

Does the end-to-end radio link work properly? (Select No Test and verify that the DS-3 equipment at both ends of the radio link are receiving the signal transmitted to it by the remote DS-3 equipment.)

Testing Ethernet Link CX-24s

58 Verify that the Link CX-24 passes the tests in Table 2.8. Note that this test uses Ethernet pings from

to ensure that the Ethernet paths and links are working properly.

Table 2.8 – Ethernet Internal Circuit and Radio Link Checklist

Checklist Item Verified Inspector Date

Does the near-end Link CX-24 input circuitry and Ethernet cabling work properly? (Use external equipment to ping the near-end Link CX24 to verify that its Ethernet equipment is responding correctly.)

Do the near-end and far-end Link CX-24 radio circuits and radio paths work properly? (Use external equipment to ping the far-end Link CX-24 to verify that its Ethernet equipment is responding correctly.)

Does the end-to-end radio link work properly? (Connect a known-good external Ethernet equipment to the far-end Link CX-24 ETHERNET 1 or ETHERNET 2 connector. Use external equipment connected to the near-end Link CX-24 to ping the external equipment connected to the far-end Link CX-24 to verify that its Ethernet equipment is responding correctly.)

When all of the acceptance tests in this section have been completed and all Checklist items have been verified, the Link CX-24 radio link has been verified. The Inspector marks for all tested items constitute acceptance of the Link CX-24 equipment and the associated radio link.

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The user is now required to finish configuring the Link CX-24 after physical installation. The Link CX-24 includes a built-in HTML-based web server, which includes configuration, operating, monitoring and test pages. This web server can be accessed locally using a Web browser on a Craft PC, or remotely using any Web browser on the same Ethernet network as the Link CX-24. The initial configuration has already been done using a Craft PC at the Link CX-24 site, and all other operation and maintenance tasks can be performed remotely or locally, as required.

2.16 Final Link CX-24 Configuration

This section details final Link CX-24 setup using a Craft PC, and provides step-by-step software update instructions. The Link CX-24 should be in the following state:

• Powered on.

• Antenna aligned with far end antenna.

• Acceptance tested.

• No Loop-backs or other tests active.

• Carrying, or capable of carrying, payload data.

• Transmit attenuation disabled.

• Transmitting at minimum required transmit power (Automatic Tx Power Control disabled, unless required).

Obtain a copy of the information entered in Table 2.3, Radio Link Planning Worksheet, and continue with the following steps:

1. Record the RSSI level from Step 55 in the previous section for future reference. The Step 55 value is the RSSI level with Automatic Tx Power Control disabled.

2. Connect your computer to the Link CX-24 through the Ethernet equipment connected to the ETHERNET 1 or ETHERNET 2 port.

3. Log in to the Link CX-24 built-in web server to display the Monitor page as described in Section

2.10.2.

4. Go to the Test page, and verify that No Test is selected.

5. Go to the Commission Radio page, and verify that the entries on this page match the entries in Table

2.3, Radio Link Planning Worksheet. Make sure the Tx Attenuation is set to No attenuation, and that Automatic Tx Power Control is set to Enable.

6. Go to the Commission Manager Interfaces page, and verify that the entries on this page match the entries in Table 2.3, Radio Link Planning Worksheet.

You can upgrade the login security of the Link CX-24 at this time. If you want to restrict access to the Link CX-24, consider the following:

• If the Link CX-24 does not have a Login Name and Password, you can assign one now.

• If the Link CX-24 allows login from any IP address, you may want to restrict login to only one or

two IP addresses. MAKE SURE the Craft PC IP address is included if you select this option.

• If the Link CX-24 is set to broadcast SNMP traps to the Public community, you can restrict

broadcasts to a different community.

• If the Link CX-24 is set to broadcast SNMP traps to multiple IP addresses, you can restrict

broadcasts to fewer IP addresses.

• If the Link CX-24 is set to allow read-write access from the Public community, you can restrict

read-write access to a different community.

• If the Link CX-24 is set to allow read-write access from any or multiple IP addresses, you can

restrict read-write access to fewer IP addresses.

• If the Link CX-24 is set to allow read-only access from the Public community, you can restrict read-

only access to a different community.

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• If the Link CX-24 is set to allow read-only access from any IP address, you can restrict read-only

access to fewer IP addresses.

7. When required, make any security upgrades as described in Step 6.

The Link CX-24 is now fully configured, tested, and operational, and should continue to operate unattended. Continue with Section 3 for monitoring and trend analysis, and refer to Section 4 for troubleshooting information.

2.17 Updating the Link CX-24 Software

To update the Link CX-24 software, perform the following procedures at both ends of the radio link. Note that when you are updating Ethernet models of the Link CX-24, you should update the far-end Link CX-24 first, and the near-end Link CX-24 second to ensure that you do not lose radio communications with the far end.

Note: This procedure will take down the radio link until the update procedure is completed at both

ends of the radio link.

1. Connect your web browser to the Link CX-24:

• For a DS-3 Link CX-24, connect your web browser-equipped Craft PC or desktop PC to the Link

CX-24 as described in Section 2.10.1.

• For an Ethernet Link CX-24, make sure that your web browser-equipped Craft PC or desktop PC

is connected to the same network as the Link CX-24.

2. Log into the Link CX-24 website by opening location http://<IP Address>/ in your web browser.

• For a DS-3 Link CX-24, your web browser-equipped Craft PC or desktop PC is directly connected

to the Link CX-24.

• For an Ethernet Link CX-24, make sure that you log into the Link CX-24 at the far end of the radio

link and update it first.

3. Navigate to the Update Software web page. A sample Update Software page for DS-3 is shown in Fig 2.18, and for Ethernet in Fig. 2.19.

Figure 2.18 – Typical DS-3 Update Software Web Page

Figure 2.19 – Typical Ethernet Update Software Web Page

4. Using the radio buttons, select the software version you are to overwrite. Usually, this will be the lower-numbered version, or the version you are not currently using.

5. Contact Customer Support for instructions to FTP the software files to the Link CX-24.

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6. When the software has been FTPd to the Link CX-24, return to the Update Software page. This process has deleted the selected software load with the new software load. Do not activate the new software load until both ends have received their new software loads.

7. Repeat Step 1 through Step 6 of this update process for the near-end Link CX-24, and then continue with Step 8.

8. Now that both ends of the radio link have the new software load in memory, do the following to activate the new software load as follows:

9. Log into the far-end Link CX-24 and navigate to the Update Software page.

10. Select the new software load and click Reboot. The far-end Link CX-24 reboots and activates the new software load.

11. Log into the near-end Link CX-24 and navigate to the Update Software page.

12. Select the new software load and click Reboot. The near-end Link CX-24 reboots and activates the new software load. Should the radio link not be restored, make sure that both ends of the radio link are using the same software load.

Both of the Link CX-24s on the radio link now are using the new software load and the previous configuration parameters, and as soon as they resynchronize their signals, the radio link is restored.

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Section 3

Monitoring and Trend Analysis

60000

3.1 Built-In Web Server Interface

Each Link CX-24 and radio link can be monitored through either the built-in Web server or SNMP agent interfaces.

A subset of the SNMP-accessible statistics is available through the Web server interface connected to a web browser over an Ethernet link. These statistics can be read by logging in to display the Monitor page, as shown in Appendix C. Statistics can be repeatedly sampled using the Web browser reload or refresh feature.

The easiest indicator to monitor is the RSSI. Keep a record of the RSSI levels measured in Step 55 in Section 2. The Step 55 value is the RSSI level with Automatic Tx Power Control disabled (transmitting at maximum power), with Automatic Tx Power Control disabled.

A properly designed radio link with a 20 dB or greater fade margin should indicate receive levels in the area of -60 dBm at Link CX-24 sites. The accuracy of the indicated RSSI is approximately ±5 dB over a range of -90 dBm to -65 dBm.

3.2 SNMP Network and Element Management Systems

3.2.1 SNMP Details

All monitored statistics are available through SNMP queries. In addition to MIB-II variables, productspecific variables are available through the Link CX-24 enterprise MIB, which can be retrieved via FTP from F:/PUB/link_cx.mib (text file) in the Link CX-24 file system. Most commercial SNMP NMSs and EMSs have the ability to sample variables over time and display trends and raise alarms based on defined thresholds. In addition, applicable SNMP traps are supported and can be used to raise alarms on the NMS and/or EMS.

Any standard SNMP NMS or EMS can be used to monitor and control the Link CX-24 network and individual Link CX-24 radios.

The Link CX-24 has an enterprise MIB provided in standard ASCII format, which can be accessed for printing. When a software upgrade is performed, the self-extracting file places all directories and associated files necessary for the upgrade in a location specified by the operator at the time the selfextracting file is executed. One of the directories created is /PUB, which contains the printable enterprise ASCII text MIB file named link_cx.mib.

The enterprise MIB file is also stored in FLASH memory on the Link CX-24 in F:/PUB. A copy of the link_cx.mib file can be extracted from the Link CX-24 using an ASCII FTP file transfer.

3.2.2 Monitoring Error Messages and Traps

The Link CX-24 supports the generic SNMP traps and Link CX-24 enterprise traps. When an error (or informational) message is generated by the router, an SNMP trap is issued (when enabled), and the message is also written to an error log maintained within the router. The router’s error log table holds the last 256 error messages and can be queried through SNMP reads. Refer to Appendix E for a detailed list of router-specific messages and traps.

The error log is read ten entries at a time. To do an SNMP read of the first (oldest) ten entries, perform the following SNMP operations:

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1. Set elLogEntryNumber to start at the oldest entry 0.

2. Set elScrollControl to forward to read log in FORWARD direction – oldest entries first.

3. Get elTrapTable retrieves the most recent ten entries – repeat for next ten entries.

The following SNMP operations also can be used to access or modify information in the error log:

• To read the log in the BACKWARDS direction, set elScrollControl to backward.

• To clear the log, set elScrollControl to clearLog.

• To set the threshold for the lowest severity of messages to be generated, set elLevelDisable to 1

(normal) through 5 (critical). Setting the threshold properly avoids filling the log with informational or non-serious errors.

• To set the current date and time (default after reboot is 12 Midnight, January 1, 1970), set the

appropriate fields of elTimeDate, or use the Control page on the UI. The timestamps included in error messages are generated relative to this date and time.

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Section 4

Troubleshooting the Link CX-24

4.1 Troubleshooting Tables

This section includes a troubleshooting table for different symptoms:

Table 4.1 – Symptoms and Probable Causes

Symptoms Probable Cause

Power loss to Link CX-24

New obstructions (leafy trees and/or No response from Link CX-24 No payload data being transmitted

Reduced RSSI High BER Reduced payload data transmission rate

buildings, for example)

Antenna no longer in alignment

Damaged cables

Defective transmission equipment

New obstructions (leafy trees and/or

buildings, for example)

Antenna no longer in alignment

Damaged or degraded cables

New interferers (multipath reflections from

flooded fields or new buildings, or new

consumer applications, for example)

ATPC unable to block a frequency hopping Intermittent transmissions

transmitter or other intermittent interferer --

disable ATPC

4.2 Using the Link CX-24 LEDs

Link CX-24 operation can be monitored using the LEDs. The LEDs show general radio link status at a glance. See Figure 1.4 for LED locations on the Link CX-24 radio. The LEDs operate in the following modes.

Table 4.2 – LEDs and Alarm Indication Modes

LED Normal State Alarm State

PWR/LCL ALM ON -- Power on and no alarm

RF LINK ON -- Receive RF OK OFF -- Receive radio link alarm DATA ON -- DS-3 input OK OFF -- DS-3 input LOS

ENET 2

ENET 1

ON -- Ethernet input OK Flashing -- Receiving Ethernet data

Flashing -- Local alarm OFF -- Power off

OFF -- No Ethernet input

4.3 Using RSSI

When you connect a voltmeter with BNC adapter to the Link CX-24 RSSI port, you can measure an indication of the received RF signal level. When the Receive Level falls below -70 dBm, see Table 4.1 for a list of possible causes.

Note: Make sure you replace the Link CX-24 RSSI connector cover after troubleshooting the radio link.

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4.4 Using a Web Browser

As described in Appendix C, most of the Link CX-24 configuring, operating, and maintenance are performed using the Link CX-24 Web pages. Use the error indications in the web server interface and Table 4.1 to troubleshoot alarm indications.

4.5 Customer Support Services

Your primary source of assistance is the support staff of the organization from which you purchased this product. The YDI support staff should only be contacted directly if you purchased this product directly from YDI, or if you are unable to obtain sufficient assistance from your primary support contact.

Note: Before you contact Technical Support, please make sure that you have read and thoroughly

understood all instructions outlined on this manual.

4.5.1 Detailed Company and Product Information, Sales, Pricing, and Technical Support for the East Coast

YDI Wireless 8000 Lee Highway Falls Church, VA 22042 USA Tel.: 703-205-0600 Fax: 703-205-0610 E-mail: tech@ydi.com Website: www.ydi.com Sales: 1-888-297-9090

4.5.2 Detailed Company and Product Information, Sales, Pricing, and Technical Support for the West Coast

YDI Wireless 990 Almanor Avenue Sunnyvale, CA 94085 USA Tel: 408-617-8150 Fax: 408-617-8151 E-mail: tech@ydi.com Website: www.ydi.com Sales: 1-800-664-7060

4.5.3 Return Procedure

All material returned to YDI must be accompanied by a Return Material Authorization (RMA) number from YDI’s Customer Service department. An RMA number is necessary to assure proper tracking and handling of returned material at the factory. YDI reserves the right to refuse shipments not accompanied by an RMA number. Refused shipments will be returned to the shipper via collect freight. To obtain an RMA number, get an RMA form, and learn about the Return Procedures, please visit: www.ydi.com/RMA

The customer is responsible to properly label and package repairs and prepay shipping to YDI If possible. The original packaging material should be used to return electronic parts. The RMA number must be visible on the outside of all packages returned. Unless other arrangements have been made, all repairs are shipped back to the customer prepaid via ground carrier.

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Appendix A - Interface Cable Pinouts

Table A.1 – DS-3 Data Cables

Link CX-24 IN/OUT TNC

Connectors

Pin Function

1 RX – TX 1

Shield GND Foil GND Shield

2 TX – RX 2

Shield GND Foil GND Shield

Table A.2 – 10/100 Ethernet Data or Control Cable

Link CX-24 ETHERNET

1/2 Connectors

Pin Function

1 RX+ White/Orange TX+ 1 2 RX- Orange TX- 2 3 TX+ White/Green RX+ 3 4 TX- Green RX- 6

Wire Color

DS-3 Equipment BNC Port

Function Pin

Ethernet Equipment RJ-45 Port

Function Pin

Table A.3 – DC Power Cable

To Link CX-24 POWER

(4-pin Circular)

Pin Function

1 -V in White/Orange -V out White 2 – – – – 3 – – – – 4 +V in Red +V out Red

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Wire Color

To DC Power Supply

Function Wire

Link CX-24 User’s Manual

Table A.4 – 10/100 Ethernet Crossover Cable

Link CX-24 ETHERNET

1/2 Connectors

Wire Color

Pin Function

Link CX-24 ETHERNET

1/2 Connectors

Function Pin

1 RX+ White/Orange TX+ 3 2 RX- Orange TX- 4 3 TX+ White/Green RX+ 1 4 TX- Green RX- 2

Table A.5 – RS-232 CLI Craft PC Cable

To Link CX-24 TEST (4-pin

Circular)

Pin Function

Wire Color

To Craft PC Serial DB-9 Port

Function Pin

1 N/C – N/C – 2 RS-232 RX Red RS-232 TX 3 3 RS-232 TX Black RS-232 RX 2 4 RS-232 GND Yellow RS-232 GND 5

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Appendix B - Technical Specifications

Table B.1 – Link CX-24 DS-3 or Ethernet Version (24 GHz)

General Frequency Range 24.05-24.250 GHz Compliance (USA) FCC Rules Part 15.249

Capacity

Emission Bandwidth 26 dB at 13.9 MHz Channel Center Frequencies

• Channel 1 (Tx Low/Rx High) Transmit -- 24.072GHz/Receive -- 24.212GHz

• Channel 1 (Tx High/Rx Low) Transmit -- 24.212GHz/Receive -- 24.072GHz

• Channel 2 (Tx Low/Rx High) Transmit -- 24.088GHz/Receive -- 24.228GHz

• Channel 2 (Tx High/Rx Low) Transmit -- 24.228GHz/Receive -- 24.088GHz Modulation Type 16 QAM Transmitter Maximum RMS Power Output 0 dBm Power Output Stability +/- 2 dB Frequency Stability +/- 0.24MHz Transmit Duty Cycle 100% Emissions Mask & Spurious and Harmonic Output Per FCC CFR 47 Part 15.249 Channel Frequency Selection Software-controlled

Automatic Tx Power Control (ATPC)

Transmitter Attenuation Range

Receiver

Type Double Heterodyne Error Correction FEC Reed Solomon Decoding Sensitivity at 10-6 BER -78 dBm state guaranteed Typical Unfaded BER 10 Frequency Stability +/- 0.24MHz Channel Frequency Selection Software-controlled Maximum Receive Level without Receiver

Degradation

Maximum Receive Level without Receiver Damage

Full-duplex DS-3, per Bellcore GR-499-CORE, or 45 Mbps Ethernet, per IEEE 802.3

Maintains a constant Carrier-to-Noise Ratio at both ends of a link, operator enabled ON or OFF

0-30 dB in 1 dB steps, and Mute 40 dB, operator controlled

-10

-35 dBm

-30 dBm

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Table B.1 – Link CX-24 DS-3 or Ethernet Version (24GHz) (continued)

DS-3 Interface

Type Full-duplex DS-3, per Bellcore GR-499-CORE Line Rate 44.736 Mbps Line Code B3ZS Tx and Rx Electrical Interfaces 75 Ohm unbalanced Tx and Rx Physical Connectors Female TNC coaxial with grounded outer conductor

Ethernet Interfaces

Number

Two, with independent transmit and receive pair sensing

Type Full-duplex 10/100 Base-T per IEEE 802.3 Line Rate 45 Mbps Max Distance between CPE and Link CX-24 100 m (328 ft.) Electrical Interfaces 100 Ohm UTP Physical Connectors Female four-pin Circular

Other Interfaces

Craft Port

RSSI

Male four-pin Circular, RS-232 asynchronous data port (TXD, RXD, GND)

Female BNC, DC voltage level proportionate to Received Signal Strength

Power Requirements DC Source +/- 21 to +/- 60 VDC Power Consumption 36 watts typical Undervoltage Protection Circuit > +/- 18 VDC to power up the Link CX-24 Physical Connector Male four-pin Circular Environmental Ambient Temperature Range

• Operational -32 to +60°C (-27 to +140°F)

• Storage -40 to +85°C (-40 to +185°F) Relative Humidity

• Operational 100%, all weather protection

• Storage 95%, non-condensing Altitude

• Operational 15,000 ft. AMSL (4,500m)

• Storage 50,000 ft. AMSL (15,000m) Mechanical Height (HxWxD) 30 x 30 x 10.6 cm (12 x 12 x 4.25 in.) Weight (TBD) kg ( lb.); Shipping Weight: kg ( lb.)

Table B.2 describes the specifications for the integral antenna on the Link CX-24. Table B.3 gives the Linx CX-24 availability figures for North America.

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Table B.2 – Integral Reflector Antenna

Size

Mounting

Polarization

30 cm diameter x 1.9 cm deep (12 in diameter x 0.75 in deep)

Permanently attached to the Link CX-24 radio; gasketed to prevent moisture intrusion

Horizontal or vertical, depending on Link CX-24 mounting position

Forward Gain 34.5 dBi Front/Back Ratio >45 dB Beam Width 2.9° Elevation Adjustment ± 15° Azimuth Adjustment 360°

Table B.3 – Link CX-24 Availability – North America

Carrier

Grade

99.999%

0.4

Typical

Application

Avai lability

Rain Outage at Maximum Distance (minutes/month)

Maximum Distance1

(miles)

ITU Rain Zone

A (Arctic)

B (Nevada, Idaho, Inland BC)

C (Anchorage)

D (San Francisco, Sacramento)

E (Los Angeles, San Diego)

F (Newfoundland)

K (New York, Philadelphia)

M (Dallas, Atlanta)

N (New Orleans, Miami)

Hotspot/ISP/WISP

WAN

99.7%

131

99.9%

44

99.97%

13

99.99%

4

VOIP

99.997%

1

5.5 5.0 4.1 3.5 2.8 2.2

5.0 4.6 3.9 3.0 2.3 1.8

4.2 4.1 3.4 2.7 2.0 1.5

4.3 3.5 2.9 2.4 1.9 1.5

4.9 3.9 3.0 2.2 1.5 1.1

4.3 3.5 2.7 1.9 1.3 0.9

4.3 3.0 2.1 1.5 1.1 0.8

3.1 2.2 1.5 1.1 0.8 0.7

2.7 1.7 1.1 0.8 0.6 0.5

1. Maximum Distance and Availability based on Line-of-Site installation and ITU average rainfall statistics. Actual performance may vary.

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Appendix C - Using the Web-Based GUI User Interface

30000

The Link CX-24 includes its own HTML-based installation, operation and test Web pages, which can be accessed locally using a Web browser on a Craft PC, or remotely using any Web browser on the same network as the Link CX-24.

C-1 Web Browser Requirements

The Web browser used to install, operate, and maintain the Link CX-24 must have an HTML-enabled interface.

C-2 Connecting A Web Browser

You must connect your Web browser to the Link CX-24; either locally using a Craft PC, or remotely using any Web browser on the same Ethernet network as the Link CX-24. The web browser platform must have an Ethernet adapter for connecting to the Link CX-24 directly, or to the Link CX-24 though other Ethernet equipment.

C-3 Accessing the Link CX-24 Web Pages

Once your Web browser is connected to the Link CX-24 as described in Section C-2, you can access and move through the configuration and maintenance pages as you would any other Web site. The rest of this paragraph will describe how to access the Link CX-24 Web pages.

C-4 Link CX-24 Web Pages

The following figures show the Link CX-24 Web pages, and Chapter Four through Chapter Seven describe how to use the Link CX-24 Web pages to configure, install, and maintain the Link CX-24.

C-4.1 All Versions

To access the Link CX-24 built-in website, connect the Link CX-24 to your Craft PC using the Ethernet cable, open your Craft PC web browser, and open Ethernet address http:// 10.0.0.2/ (transmit low models) or http://10.0.0.3/ (transmit high models) in the web browser.

When the web browser Ethernet address has been changed, use the replacement Ethernet address instead of http://10.0.0.x/

When the Link CX-24 is configured for a password, enter it in the window shown in Figure C.1, and the web browser takes you to Figure C.2 (DS-3 models). When the Link CX-24 is not configured for a password, the web browser takes you directly to Figure C.2.

.

Figure C.1 – Link CX-24 Login Window (all models)

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C-4.2 DS-3 Versions

Figure C.2 – Link CX-24 DS-3 Monitor Web Page

Note that the Monitor page has a hypertext link to the Link CX-24 on the far end of the radio link for faster troubleshooting and easy movement between the two Link CX-24s.

Figure C.3 – Link CX-24 DS-3 Commission Radio Web Page

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Figure C.4 – Link CX-24 DS-3 Commission Manager Web Page

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Figure C.5 – Link CX-24 DS-3 Test Web Page

Figure C.6 – Link CX-24 DS-3 Update Software Web Page

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C-4.3 Ethernet Versions

Figure C.7 – Link CX-24 Ethernet Monitor Web Page

Note that the Monitor page has a hypertext link to the Link CX-24 on the far end of the radio link for faster troubleshooting and easy movement between the two Link CX-24s.

Figure C.8 – Link CX-24 Ethernet Commission Radio Web Page

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Figure C.9 – Link CX-24 Ethernet Commission Manager Web Page

Figure C.10 – Link CX-24 Ethernet Test Web Page

Figure C.11 – Link CX-24 Ethernet Update Software Web Page

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Appendix D - Grounding and Lightning Protection

This appendix explains how to properly set up the Link CX-24 radio for grounding and lightning protection.

D-1 Overview

When used in telecommunications, good grounding practices have some direct benefits that can help users maximize system uptime as well as ensure the safety of those people working on the system. Among these benefits are:

• Protection of personnel from electric shock and fire hazards

• Reduction of radiated and conducted electromagnetic susceptibility

• Improved system tolerance to discharge of electrostatic energy and lightning interference

• Minimized service interruptions and service damage

No practice or formula can completely eliminate the above risks, but YDI believes that good grounding and bonding practices can significantly reduce the risk of many of these hazards. This appendix includes a bibliography that contains several publications that are readily available and provide detailed information on many aspects of grounding systems and their design, implementation, measurement, and maintenance.

Please note that every telecommunication site is unique and must be evaluated accordingly. The following information is provided for generic reference and educational purposes only. The grounding plans and practices for a given site should be established and implemented only by trained professionals, working in accordance with local practices and regulations.

YDI strongly recommends that you install a Transtector Lightning Arrestor or equivalent at the cable entry to the Ethernet, Power, and/or DS-3 equipment structure.

D-2 Grounding

D-2.1 Making a Grounding Plan

A grounding plan should be developed at the outset of site design to provide the best grounding procedures and to minimize ground loop currents. Grounding should be achieved by connecting the outer conductors of the cables through a large-section copper strap to a central grounding point, and the size of the conductor should be increased as each branch path is added. The final conductor should be connected directly to the grounding system. For a radio site, a single copper grounding rod is insufficient, because its impedance is likely to be too high.

D-2.2 Grounding Buildings

Ideally, a ground ring should surround the building and be connected to individual grounds associated with feeder entry, antenna support structure, the building lightning conductor, the equipment room, the main AC supply, and other facilities. Each connection should be made by the most direct route to minimize interaction between the different grounding functions.

The ground ring should consist of copper cable or tape with electrodes two meters or longer, buried to a depth of 0.6 m and at a distance from the building not to exceed 1 m.

Buildings may require lightning rods if they are not within the zone of another protected structure. To construct a good ground, ground rods should penetrate the earth to a depth of about 2 m (6 feet).

Where the ground is in rocky terrain, make sure that the ground rods penetrate into loose soil. In sandy soil, use more ground rods to make sure that the ground has sufficient contact with water-bearing material.

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Use 4 to 6 AWG wire to connect each ground rod to the equipment to be grounded. The cables should be free of sharp bends. Each ground cable should be at least 2 m in length with at least 1 m separation between each. Refer to local and national electrical codes to determine acceptable grounding methods. The Link CX-24 chassis should be directly connected to ground to ensure that it functions correctly. In most cases, following the local code requirements for grounding and lightning protection will be adequate.

Many of the cables used by YDI have braided rather than solid outer conductors; this type of grounding is not appropriate. In these cases surge arrestors approved by YDI should be used. For information on surge arrestors, please contact the YDI Customer Support department.

D-3 Lightning Protection

Radio sites can be particularly prone to lightning strikes by virtue of their normally exposed locations and the presence of relatively tall antenna support structures.

Reference should also be made to various publications, some of which are listed in the bibliography.

Any site owner or user in doubt about the protection requirements for a particular location should contact the appropriate authority.

D-3.1 Purposes

The purposes of any protection arrangement should be to:

• Provide a suitable path to ground for the lightning current.

• Ensure adequate bonding between structures and all metalwork on the site and the common

grounding system in order to reduce side flashing.

• Prevent the entry of flashes or surges into the building.

The resistance to ground should be kept to a minimum; a value of less than 10 Ohms is recommended. Ideally, and most important, the system should be at equal potential across the entire site.

Certain authorities and service providers have their own particular practices that have to be followed where applicable.

Protection arrangements vary considerably, from very simple sites to complicated sites with multiple buildings, antenna support structures, and associated equipment. Ensuring adequate protection may also involve integration with and upgrading of existing systems.

D-3.2 Lightning Conductors

Down conductors, bonding interconnections, ground rings, and radial tapes should be of uninsulated 000 AWG copper cable or solid copper tape with a minimum cross section of 25 mm by 3 mm, with all connections protected by non-reactive paste.

Protected test points should be included if appropriate, and sacrificial ground lugs should be clearly marked and easily accessible for periodic inspection.

D-3.3 Grounding Antenna Support Structures

A structure generally acts as its own lightning conductor and, therefore, does not require an additional conductor from the top to the base. A lightning rod may be required to extend the zone of protection to equipment mounted on the top of the structure. The lightning rod should extend 2.5 m above the highest equipment.

It is not possible to provide and guarantee complete protection from the effects of lightning; however, risks of this sort can be significantly reduced by careful attention to grounding, protection devices, and the layout of the site itself.

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Ground-mounted support structures should be connected at their base to a ground ring through sacrificial ground lugs. Towers should have a connection from each leg.

A ground ring should consist of copper cable or solid copper tape, with ground rods equally spaced at 2 m intervals around the base of the structure as close to it as possible. The ground ring is buried approximately 0.6 m deep where soil conditions allow. An alternative method using radials rather than rings is detailed in The “Grounds” for Lightning and EMP Protection, published by PolyPhaser Corporation.

The ground ring should be connected to the main building ground by the most direct route, and should be buried as appropriate.

Roof-mounted structures should be connected to the main building ground by the most direct route, using sacrificial lugs and copper cable or tape as appropriate. Tower guy wires should be directly bonded at their lowest point to a suitable ground electrode or connected to the site ground by the most direct route.

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Appendix E - Enterprise MIBs and Traps

This appendix contains information about the two different sets of Link CX-24 Management Information Bases (MIBs), their current listings, and where to find the most current versions.

E-1 Enterprise MIBs

E-1.1 Overview

The DS-3 and Ethernet Link CX-24 Enterprise MIBs consist of the following groups of objects:

• link_cx_identity group: Model, revision, serial numbers, and channel frequency table.

Configured in the factory. Read-only by the customer.

• link_cx_configuration group: Channel number and other read-write parameters that the customer

chooses. This group is the system’s persistent state. It is preserved across reboots.

• link_cx_status group: Performance and alarm status, read-only. Not preserved across reboots.

• link_cx_test group: BERT, loopback, and other temporary state that the customer might use in a

test procedure. Read-write. Not preserved across reboots.

• link_cx_reboot group: Identifies the software versions that are available and controls reboot.

• link_cx_trap group: There is only one trap-related variable, trapSentCounter. It is not preserved

across reboots.

The following two sections contain details for the DS-3 and Ethernet Link CX-24 Enterprise MIBs.

E-1.2 DS-3 Version Details

LINK_CX-MIB DEFINITIONS ::= BEGIN

IMPORTS enterprises, Counter FROM RFC1155-SMI OBJECT-TYPE FROM RFC-1212;

YDI_Wireless OBJECT IDENTIFIER ::= { enterprises 792 } link_cx OBJECT IDENTIFIER ::= {YDI_Wireless 5 } link_cx_identity OBJECT IDENTIFIER ::= { link_cx 1 } link_cx_configuration OBJECT IDENTIFIER ::= { link_cx 2 } link_cx_status OBJECT IDENTIFIER ::= { link_cx 3 } link_cx_test OBJECT IDENTIFIER ::= { link_cx 4 } link_cx_reboot OBJECT IDENTIFIER ::= { link_cx 5 } link_cx_trap OBJECT IDENTIFIER ::= { link_cx 6 }

-- link_cx_identity group

unitModelNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The model number of the unit as a whole." ::= { link_cx_identity 1 }

unitRevisionNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory

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DESCRIPTION "The revision number of the unit as a whole." ::= { link_cx_identity 2 }

unitSerialNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The serial number of the unit as a whole." ::= { link_cx_identity 3 }

boardModelNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The model number of the PCB board assembly." ::= { link_cx_identity 4 }

boardRevisionNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The revision number of the PCB board assembly." ::= { link_cx_identity 5 }

boardSerialNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The serial number of the PCB board assembly." ::= { link_cx_identity 6 }

rfFrequencyTable OBJECT-TYPE SYNTAX SEQUENCE OF RfChannelFreqEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "The table of 2 selectable Tx/Rx frequency channel pairs, in MHz. The receive frequency on a Tx-high unit is lower than the transmit frequency by the amount of the Tx/Rx separation. Conversely, the receive frequency on a Tx-low unit is higher than the transmit frequency by the amount of the Tx/Rx separation." ::= { link_cx_identity 7 }

rfFrequencyEntry OBJECT-TYPE SYNTAX RfFrequencyEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "Channel frequency entry." INDEX { rfChannelIndex } ::= { rfFrequencyTable 1 }

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RfFrequencyEntry ::= SEQUENCE { rfChannelIndex INTEGER, rfTxFrequency INTEGER, rfRxFrequency INTEGER }

rfChannelIndex OBJECT-TYPE SYNTAX INTEGER (1..2) ACCESS read-only STATUS mandatory DESCRIPTION "The RF channel number." ::= { rfFrequencyEntry 1 }

rfTxFrequency OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The transmit frequency in MHz." ::= { rfFrequencyEntry 2 }

rfRxFrequency OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The receive frequency in MHz." ::= { rfFrequencyEntry 3 }

-- link_cx_configuration group

rfTxAttenuateControl OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION "If enabled, attenuates the transmit output level by 40 dB." ::= { link_cx_configuration 1 }

rfAtpcControl OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION

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"Automatic Tx Power Control mode can be enabled or disabled. If enabled, the two Link CX-24 radios at opposite ends of the radio link send each other feedback messages that they use to adjust their Tx power down to the lowest level that is consistent with good signal quality." ::= { link_cx_configuration 2 }

rfTxPowerLimit OBJECT-TYPE SYNTAX INTEGER (-30..0) ACCESS read-write STATUS mandatory DESCRIPTION "Maximum transmit power level limit at the antenna port, in dBm. The Tx power limit can be set in 1 dB steps within the range of -30 dBm to 0 dBm. If Automatic Tx Power Control is enabled the measured Tx power may be lower than this limit. If Automatic Tx Power Control is disabled the measured Tx power should be exactly the same as this target value." ::= { link_cx_configuration 3 }

rfAtpcAddress OBJECT-TYPE SYNTAX IpAddress ACCESS read-write STATUS mandatory DESCRIPTION "The IP Address of the peer radio with which this radio exchanges Automatic Tx Power Control information." ::= { link_cx_configuration 4 }

rfChannel OBJECT-TYPE SYNTAX INTEGER (1..2) ACCESS read-write STATUS mandatory DESCRIPTION "The current transmit channel of the local unit. The transmit frequency in MHz for each channel can be read in the rfFrequencyTable." ::= { link_cx_configuration 5 }

rfRssiAlarmThresholdSetting OBJECT-TYPE SYNTAX INTEGER (-80..-40) ACCESS read-write STATUS mandatory DESCRIPTION "A RSSI Alarm will be generated if the level of RSSI goes below the set threshold. The threshold can be set in 1 dB steps within the range of -80 to -40 dBm." ::= { link_cx_configuration 6 }

losAlarmControl OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION

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"DS3/E3 LOS alarm control. When enabled, the alarm will be generated. When disabled, the alarm will not be generated even if LOS condition is detected." ::= { link_cx_configuration 7 }

-- link_cx_status group

rfPowerOutputLevel OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The measured radio Tx power level in dBm." ::= { link_cx_status 1 }

rfRssiLevel OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The measured RSSI of the active channel in dBm. -110 dBm indicates the receive signal level is below the detection level." ::= { link_cx_status 2 }

bitErrorRate OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The estimated bit error rate (BER), in errors per 10^8 bits. A returned value of 0 indicates zero bit errors in 10^8 bits. A returned value of 1 indicates an estimated BER of 1x10^-8. A returned value of 10 indicates an estimated BER of 1x10^-7, and so on." ::= { link_cx_status 3 }

losAlarmStatus OBJECT-TYPE -- DS3/E3 interface alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A value of 1 indicates a DS3/E3 connection is present. A value of 2 indicates the DS3/E3 connection has been lost. If losAlarmControl = disabled, losAlarmStatus will always be normal." ::= { link_cx_status 4 }

txSynthLockAlarmStatus OBJECT-TYPE -- local alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only

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STATUS mandatory DESCRIPTION "The Tx synthesizer lock status. A value of 1 indicates the Tx synthesizer is locked. A value of 2 indicates the Tx synthesizer is unlocked" ::= { link_cx_status 5 }

rxSynthLockAlarmStatus OBJECT-TYPE -- local alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "The Rx synthesizer lock status. A value of 1 indicates the Rx synthesizer is locked. A value of 2 indicates the Rx synthesizer is unlocked" ::= { link_cx_status 6 }

lowTxPowerAlarmStatus OBJECT-TYPE -- local alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A value of 1 indicates the Tx power at the antenna port is greater than or equal to -30dBm. A value of 2 indicates the Tx power at the antenna port is less than -30 dBm." ::= { link_cx_status 7 }

demodLockAlarmStatus OBJECT-TYPE -- link alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "The demodulator lock status. A value of 1 indicates the demodulator is locked. A value of 2 indicates the demodulator is unlocked" ::= { link_cx_status 8 }

lowRssiLevelAlarmStatus OBJECT-TYPE -- link alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A RSSI alarm will be generated if the level of RSSI goes below the user configured RSSI alarm level, rfRssiAlarmThresholdSetting.

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A value of 1 indicates the received signal level is above the RSSI alarm threshold. A value of 2 indicates the received signal level is at or below the user configured RSSI alarm level. This alarm is valid only if the Rx synthesizer is locked." ::= { link_cx_status 9 }

receiverOverloadAlarmStatus OBJECT-TYPE -- link alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A receiver overload alarm will be generated if the level of RSSI is at or above -40 dBm. A value of 1 indicates the received signal level is below -40 dBm. A value of 2 indicates the received signal level is at or above -40 dBm. This alarm is only valid if the Rx synthesizer is locked." ::= { link_cx_status 10 }

bitErrorRateAlarmStatus OBJECT-TYPE -- link alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A bit error rate alarm will be generated if the level of BER is at or above 10^-3, i.e. if bitErrorRate is equal to or greater than 100000." ::= { link_cx_status 11 }

-- link_cx_test group

rfTxAttenuateTimer OBJECT-TYPE SYNTAX INTEGER (0..1800) ACCESS read-write STATUS mandatory DESCRIPTION "To temporarily enable Tx attenuation by 40 dB, write the number of seconds to this timer. When the timer counts down to 0, Tx attenuation will return to its normal unattenuated state. Writing to this timer has no effect if rfTxAttenuateControl is set to enable because in that case the transmitter is already attenuated." ::= { link_cx_test 1 }

localLoopbackControl OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION

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"The DS3/E3 local loopback control. When enabled, DS3/E3 data on the local interface is looped back through the local interface. When disabled, DS3/E3 data on the local interface is sent over the radio link to the remote unit." ::= { link_cx_test 2 }

rfLocalLoopbackTimer OBJECT-TYPE SYNTAX INTEGER (0..1800) ACCESS read-write STATUS mandatory DESCRIPTION "When this value is greater than zero, the radio is in the local loopback mode. The RF transmit signal on the local unit is converted to the receive frequency of the local unit so it can be received by the local unit, for the chosen period of time in seconds. When this timer counts down to 0 the unit reverts to normal operation in which the RF transmit signal on the local unit is transmitted over the radio link to the remote unit. The duration is selectable in 1 second intervals from 0 seconds to a maximum of 1800 seconds." ::= { link_cx_test 3 }

remoteLoopbackControl OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION "The DS3/E3 remote loopback control. With either setting of this control, DS3/E3 data on the local interface is sent to the peer radio and DS3/E3 data received from the peer radio goes to the local interface. When enabled, the peer radio loops the data back to the originating radio. When disabled, DS3/E3 data flow from end to end." ::= { link_cx_test 4 }

berTestControl OBJECT-TYPE SYNTAX INTEGER { alternatingOnesZeros(1), allOnes(2), allZeros(3), disabled(4), pseudorandom(5) } ACCESS read-write STATUS mandatory DESCRIPTION "BER test mode control. The BER test is enabled by selecting one of four different data patterns. The patterns are: (1) alternating 1's and 0's, (2) all 1's, (3) all 0's, and (5) pseudorandom 1's and 0's. The BER test is disabled by setting the BER test control to 4." ::= { link_cx_test 5 }

pseudoAisControl OBJECT-TYPE

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SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION "When enabled, pseudo-AIS (constant mark or all ones at the DS3/E3 interface) will be generated." ::= { link_cx_test 6 }

-- link_cx_reboot group

softwareVersionBank1 OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The software version in bank one." ::= { link_cx_reboot 1 }

softwareVersionBank2 OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The software version in bank two." ::= { link_cx_reboot 2 }

bootedUsingBankNumber OBJECT-TYPE SYNTAX INTEGER { bankOne(1), bankTwo(2) } ACCESS read-only STATUS mandatory DESCRIPTION "The software bank from which the unit booted." ::= { link_cx_reboot 3 }

bootUsingBankNumber OBJECT-TYPE SYNTAX INTEGER { bankOne(1), bankTwo(2) } ACCESS read-write STATUS mandatory DESCRIPTION "Selects the software bank and causes reboot." ::= { link_cx_reboot 4 }

-- traps

trapSentCounter OBJECT-TYPE SYNTAX Counter ACCESS read-only

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STATUS mandatory DESCRIPTION "Total number of enterprise traps sent since last reboot." ::= { link_cx_trap 1 }

link_cx_unit OBJECT IDENTIFIER ::= { link_cx 101 }

alarmTrap TRAP-TYPE ENTERPRISE link_cx_unit VARIABLES { rfPowerOutputLevel, rfRssiLevel, bitErrorRate, losAlarmStatus, txSynthLockAlarmStatus, rxSynthLockAlarmStatus, lowTxPowerAlarmStatus, demodLockAlarmStatus, lowRssiLevelAlarmStatus, receiverOverloadAlarmStatus, bitErrorRateAlarmStatus, trapSentCounter } DESCRIPTION "A trap that indicates a change in one or more of the alarm conditions." ::= 1

configurationChangeTrap TRAP-TYPE ENTERPRISE link_cx_unit VARIABLES { rfTxAttenuateControl, rfAtpcControl, rfTxPowerLimit, rfAtpcAddress, rfChannel, rfRssiAlarmThresholdSetting, losAlarmControl, trapSentCounter } DESCRIPTION "A trap that indicates a configuration change." ::= 2

unitTestTrap TRAP-TYPE ENTERPRISE link_cx_unit VARIABLES { rfTxAttenuateTimer, localLoopbackControl, rfLocalLoopbackTimer, remoteLoopbackControl, berTestControl, pseudoAisControl, trapSentCounter } DESCRIPTION "A trap that indicates the beginning or end of a test procedure. An alarmTrap trap might result from this procedure." ::= 3

END

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E-1.3 Ethernet Version Details

LINK_CX_ETHR_MIB DEFINITIONS ::= BEGIN

IMPORTS enterprises, Counter FROM RFC1155-SMI OBJECT-TYPE FROM RFC-1212;

YDI_Wireless OBJECT IDENTIFIER ::= { enterprises 792 } link_cx_ethr OBJECT IDENTIFIER ::= {YDI_Wireless 6 } link_cx_identity OBJECT IDENTIFIER ::= { link_cx_ethr 1 } link_cx_configuration OBJECT IDENTIFIER ::= { link_cx_ethr 2 } link_cx_status OBJECT IDENTIFIER ::= { link_cx_ethr 3 } link_cx_test OBJECT IDENTIFIER ::= { link_cx_ethr 4 } link_cx_reboot OBJECT IDENTIFIER ::= { link_cx_ethr 5 } link_cx_trap OBJECT IDENTIFIER ::= { link_cx_ethr 6 }

-- link_cx_identity group

unitModelNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The model number of the unit as a whole." ::= { link_cx_identity 1 }

unitRevisionNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The revision number of the unit as a whole." ::= { link_cx_identity 2 }

unitSerialNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The serial number of the unit as a whole." ::= { link_cx_identity 3 }

boardModelNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The model number of the PCB board assembly." ::= { link_cx_identity 4 }

boardRevisionNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only

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STATUS mandatory DESCRIPTION "The revision number of the PCB board assembly." ::= { link_cx_identity 5 }

boardSerialNumber OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The serial number of the PCB board assembly." ::= { link_cx_identity 6 }

rfFrequencyTable OBJECT-TYPE SYNTAX SEQUENCE OF RfChannelFreqEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "The table of 2 selectable Tx/Rx frequency channel pairs, in MHz. The receive frequency on a Tx-high unit is lower than the transmit frequency by the amount of the Tx/Rx separation. Conversely, the receive frequency on a Tx-low unit is higher than the transmit frequency by the amount of the Tx/Rx separation." ::= { link_cx_identity 7 }

rfFrequencyEntry OBJECT-TYPE SYNTAX RfFrequencyEntry ACCESS not-accessible STATUS mandatory DESCRIPTION "Channel frequency entry." INDEX { rfChannelIndex } ::= { rfFrequencyTable 1 }

RfFrequencyEntry ::= SEQUENCE { rfChannelIndex INTEGER, rfTxFrequency INTEGER, rfRxFrequency INTEGER }

rfChannelIndex OBJECT-TYPE SYNTAX INTEGER (1..2) ACCESS read-only STATUS mandatory DESCRIPTION "The RF channel number." ::= { rfFrequencyEntry 1 }

rfTxFrequency OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory

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DESCRIPTION "The transmit frequency in MHz." ::= { rfFrequencyEntry 2 }

rfRxFrequency OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The receive frequency in MHz." ::= { rfFrequencyEntry 3 }

-- link_cx_configuration group

rfTxAttenuateControl OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION "If enabled, attenuates the transmit output level by 40 dB." ::= { link_cx_configuration 1 }

rfAtpcControl OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION "Automatic Tx Power Control mode can be enabled or disabled. If enabled, the two Link CX-24 radios at opposite ends of the radio link send each other feedback messages that they use to adjust their Tx power down to the lowest level that is consistent with good signal quality." ::= { link_cx_configuration 2 }

rfTxPowerLimit OBJECT-TYPE SYNTAX INTEGER (-30..0) ACCESS read-write STATUS mandatory DESCRIPTION "Maximum transmit power level limit at the antenna port, in dBm. The Tx power limit can be set in 1 dB steps within the range of -30 dBm to 0 dBm. If Automatic Tx Power Control is enabled the measured Tx power may be lower than this limit. If Automatic Tx Power Control is disabled the measured Tx power should be exactly the same as this target value." ::= { link_cx_configuration 3 }

rfAtpcAddress OBJECT-TYPE SYNTAX IpAddress ACCESS read-write

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STATUS mandatory DESCRIPTION "The IP Address of the peer radio with which this radio exchanges Automatic Tx Power Control information." ::= { link_cx_configuration 4 }

rfChannel OBJECT-TYPE SYNTAX INTEGER (1..2) ACCESS read-write STATUS mandatory DESCRIPTION "The current transmit channel of the local unit. The transmit frequency in MHz for each channel can be read in the rfFrequencyTable." ::= { link_cx_configuration 5 }

rfRssiAlarmThresholdSetting OBJECT-TYPE SYNTAX INTEGER (-80..-40) ACCESS read-write STATUS mandatory DESCRIPTION "A RSSI Alarm will be generated if the level of RSSI goes below the set threshold. The threshold can be set in 1 dB steps within the range of -80 to -40 dBm." ::= { link_cx_configuration 6 }

losAlarmControl OBJECT-TYPE SYNTAX INTEGER { enabled(1), disabled(2) } ACCESS read-write STATUS mandatory DESCRIPTION "Ethernet Loss Of Signal alarm control. When enabled, the alarm will be generated. When disabled, the alarm will not be generated even if LOS condition is detected." ::= { link_cx_configuration 7 }

-- link_cx_status group

rfPowerOutputLevel OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The measured radio Tx power level in dBm." ::= { link_cx_status 1 }

rfRssiLevel OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The measured RSSI of the active channel in dBm. -110 dBm indicates the receive signal level is below the detection level." ::= { link_cx_status 2 }

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bitErrorRate OBJECT-TYPE SYNTAX INTEGER ACCESS read-only STATUS mandatory DESCRIPTION "The estimated bit error rate (BER), in errors per 10^8 bits. A returned value of 0 indicates zero bit errors in 10^8 bits. A returned value of 1 indicates an estimated BER of 1x10^-8. A returned value of 10 indicates an estimated BER of 1x10^-7, and so on." ::= { link_cx_status 3 }

losAlarmStatus OBJECT-TYPE -- interface alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A value of 1 indicates an Ethernet connection is present. A value of 2 indicates the Ethernet connection has been lost. If losAlarmControl = disabled, losAlarmStatus will always be normal." ::= { link_cx_status 4 }

txSynthLockAlarmStatus OBJECT-TYPE -- local alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "The Tx synthesizer lock status. A value of 1 indicates the Tx synthesizer is locked. A value of 2 indicates the Tx synthesizer is unlocked" ::= { link_cx_status 5 }

rxSynthLockAlarmStatus OBJECT-TYPE -- local alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "The Rx synthesizer lock status. A value of 1 indicates the Rx synthesizer is locked. A value of 2 indicates the Rx synthesizer is unlocked" ::= { link_cx_status 6 }

lowTxPowerAlarmStatus OBJECT-TYPE -- local alarm condition SYNTAX INTEGER { normal(1),

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alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A value of 1 indicates the Tx power at the antenna port is greater than or equal to -30 dBm. A value of 2 indicates the Tx power at the antenna port is less than -30 dBm." ::= { link_cx_status 7 }

demodLockAlarmStatus OBJECT-TYPE -- link alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "The demodulator lock status. A value of 1 indicates the demodulator is locked. A value of 2 indicates the demodulator is unlocked" ::= { link_cx_status 8 }

lowRssiLevelAlarmStatus OBJECT-TYPE -- link alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A RSSI alarm will be generated if the level of RSSI goes below the user configured RSSI alarm level, rfRssiAlarmThresholdSetting. A value of 1 indicates the received signal level is above the RSSI alarm threshold. A value of 2 indicates the received signal level is at or below the user configured RSSI alarm level. This alarm is valid only if the Rx synthesizer is locked." ::= { link_cx_status 9 }

receiverOverloadAlarmStatus OBJECT-TYPE -- link alarm condition SYNTAX INTEGER { normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A receiver overload alarm will be generated if the level of RSSI is at or above -40 dBm. A value of 1 indicates the received signal level is below -40 dBm. A value of 2 indicates the received signal level is at or above -40 dBm. This alarm is only valid if the Rx synthesizer is locked." ::= { link_cx_status 10 }

bitErrorRateAlarmStatus OBJECT-TYPE -- link alarm condition SYNTAX INTEGER {

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normal(1), alarm(2) } ACCESS read-only STATUS mandatory DESCRIPTION "A bit error rate alarm will be generated if the level of BER is at or above 10^-3, i.e. if bitErrorRate is equal to or greater than 100000." ::= { link_cx_status 11 }

-- link_cx_test group

rfTxAttenuateTimer OBJECT-TYPE SYNTAX INTEGER (0..1800) ACCESS read-write STATUS mandatory DESCRIPTION "To temporarily enable Tx attenuation by 40 dB, write the number of seconds to this timer. When the timer counts down to 0, Tx attenuation will return to its normal unattenuated state. Writing to this timer has no effect if rfTxAttenuateControl is set to enable because in that case the transmitter is already attenuated." ::= { link_cx_test 1 }

-- link_cx_reboot group

softwareVersionBank1 OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The software version in bank one." ::= { link_cx_reboot 1 }

softwareVersionBank2 OBJECT-TYPE SYNTAX DisplayString (SIZE (0..15)) ACCESS read-only STATUS mandatory DESCRIPTION "The software version in bank two." ::= { link_cx_reboot 2 }

bootedUsingBankNumber OBJECT-TYPE SYNTAX INTEGER { bankOne(1), bankTwo(2) } ACCESS read-only STATUS mandatory DESCRIPTION "The software bank from which the unit booted." ::= { link_cx_reboot 3 }

bootUsingBankNumber OBJECT-TYPE SYNTAX INTEGER {

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bankOne(1), bankTwo(2) } ACCESS read-write STATUS mandatory DESCRIPTION "Selects the software bank and causes reboot." ::= { link_cx_reboot 4 }

-- traps

trapSentCounter OBJECT-TYPE SYNTAX Counter ACCESS read-only STATUS mandatory DESCRIPTION "Total number of enterprise traps sent since last reboot." ::= { link_cx_trap 1 }

link_cx_unit OBJECT IDENTIFIER ::= { link_cx_ethr 101 }

alarmTrap TRAP-TYPE ENTERPRISE link_cx_unit VARIABLES { rfPowerOutputLevel, rfRssiLevel, bitErrorRate, losAlarmStatus, txSynthLockAlarmStatus, rxSynthLockAlarmStatus, lowTxPowerAlarmStatus, demodLockAlarmStatus, lowRssiLevelAlarmStatus, receiverOverloadAlarmStatus, bitErrorRateAlarmStatus, trapSentCounter } DESCRIPTION "A trap that indicates a change in one or more of the alarm conditions." ::= 1

configurationChangeTrap TRAP-TYPE ENTERPRISE link_cx_unit VARIABLES { rfTxAttenuateControl, rfAtpcControl, rfTxPowerLimit, rfAtpcAddress, rfChannel, rfRssiAlarmThresholdSetting, losAlarmControl, trapSentCounter } DESCRIPTION "A trap that indicates a configuration change." ::= 2

unitTestTrap TRAP-TYPE ENTERPRISE link_cx_unit VARIABLES { rfTxAttenuateTimer,

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trapSentCounter } DESCRIPTION "A trap that indicates the beginning or end of a test procedure. An alarmTrap trap might result from this procedure." ::= 3

END

E-2 Enterprise Traps

Link CX-24 supports three enterpriseSpecific traps - alarmTrap, configurationChangeTrap, and unitTestTrap. Each of these traps contains all the relevant variables for that particular trap, in order to minimize polling. One variable that is in each of the traps is a counter, so that the network management application can detect loss of traps.

E-2.1 alarmTrap

Link CX-24 sends this trap when any of the alarm variables changes, either going into or out of an alarm condition. All of the relevant alarm conditions and performance data are contained in the trap PDU, along with a counter of enterprise traps sent. The variables include:

• trap counter

• DS3 LOS status (DS3 input absent/present)

• Tx Power status (under/over minimum power)

• Tx Synthesizer lock status (unlocked/locked)

• Rx Synthesizer lock status (unlocked/locked)

• RSSI level status (under minimum level)

• Rx overload status (over maximum level)

• BER status (over threshold)

• demodulator lock status (unlocked/locked)

• BER

• RSSI

• Tx Power

E-2.2 configurationChangeTrap

Link CX-24 sends this trap when the persistent state of the Link CX-24 changes. This trap alerts the network management application that it must refresh its database. If all management is through SNMP exclusively, this trap is redundant. If on the other hand, management is a mixture of HTTP and SNMP this will keep the SNMP side completely consistent. All the relevant persistent state variables are contained in the trap PDU, along with the trap counter. The variables include:

• trap counter

• Tx control (attenuated/unattenuated)

• ATPC control (ATPC enabled/disabled)

• Tx power setting

• ATPC peer IP address (IP address of the CX at the other end of the radio link)

• channel number

• RSSI alarm threshold

• DS3 LOS control (enable/disable alarm for LOS)

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E-2.3 unitTestTrap

Link CX-24 sends this trap when any of the test variables change, either at the start or at completion of a test. All the test state variables are contained in the trap PDU, along with the trap counter. This trap alerts the management application that a change has taken place that will probably result in an alarmTrap before too long (in case it doesn’t already know, and in case it wants to distinguish between this case and spontaneous alarmTraps). The state variables in the trap PDU include:

• trap counter

• DS3 local loopback

• DS3 remote loopback

• radio loopback

• pseudoAIS

• BERT

• temporary Tx attenuation

Bibliography

ITU - T K.40 Protection against LEMP(Lightning ElectroMagnetic

Pulse) in telecommunications centers

ITU - T K.27 Bonding configurations and earthing inside a

telecommunication building

ITU - T K.35 Bonding configurations and earthing at remote electronic

sites

ITU - T K.39 Risk assessment of damages to telecommunications

sites due to lightning discharges

ITU - T Lightning Handbook The protection of telecommunication lines and

equipment against lightning discharges

IEEE Emerald Book Powering and Grounding

The “Grounds” for Lightning and EMP (Electromagnetic Pulse) Protection, second edition Published by PolyPhaser Corporation

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YDI Wireless CX-DS3-ETH-24 Users Manual

Specifications and Main Features

Frequently Asked Questions

User Manual