LBI-39076B System Manual EDACS Enhanced Local Interconnect (ELI) ericssonz
LBI-39076B NOTICES REVISION HISTORY Revision Date Reason for Change - Sep 1994 Original Release (ELI Software Release 1.0) A Jan 1995 Revision D Main Board and Corrections B Feb 1996 Revision E Main Board, ELI Software Release 1.1, and Corrections NOTICE! This Manual covers Ericsson and General Electric products manufactured and sold by Ericsson Inc. NOTICE! Repairs to this equipment should be made only by an authorized service technician or facility designated by the supplier.
TABLE OF CONTENTS LBI-39076B TABLE OF CONTENTS PAGE REGULATORY COMPLIANCE ............................................................................................................... 7 SPECIFICATIONS ..................................................................................................................................... 9 INTRODUCTION....................................................................................................................................... 10 DESCRIPTION.........
LBI-39076B TABLE OF CONTENTS TABLE OF CONTENTS (Cont.) PAGE CONFIGURATION .................................................................................................................................... 29 OVERVIEW......................................................................................................................................... 29 SITE CONTROLLER DATABASE ....................................................................................................
FIGURES LBI-39076B LIST OF FIGURES AND TABLES PAGE Figure 1 - Location of ELI Components in a Typical EDACS Installation ................................................. 10 Figure 2 - GTI Audio Paths ......................................................................................................................... 11 Figure 3 - Card Layout for PDP Upgraded to VAX ....................................................................................
LBI-39076B FIGURES AND TABLES LIST OF FIGURES AND TABLES (Cont.) PAGE Figure 31 - MASTR II & IIe Connections................................................................................................... 25 Figure 32 - PCM / Data Bus Cable .............................................................................................................. 26 Figure 33 - Site Controller Computer Connections .....................................................................................
REGULATORY COMPLIANCE LBI-39076B REGULATORY COMPLIANCE FEDERAL COMMUNICATIONS COMMISSION (FCC) REGULATIONS 1. This Telephone Interconnect, before its connection to a Telephone Central Office, must be reported to the "CENTRALIZED OPERATIONS GROUP" of the local area Telephone Company (not the business office) by the user, installer, or Installation Supervisor to ensure a smooth installation. The following three Central Office telephone connection configurations are possible: a.
LBI-39076B REGULATORY COMPLIANCE REGULATORY COMPLIANCE (Cont.) FEDERAL COMMUNICATIONS COMMISSION (FCC) REGULATIONS b. Incoming call is routed to a dial prompt. c. Incoming call is routed to a recorded announcement that can be administered by the CPE (Customer Premise Equipment) user. 9. If this unit malfunctions, the telephone company may disconnect service temporarily. If disconnection is necessary, the telephone company must attempt to notify the user in advance, if possible.
SPECIFICATIONS LBI-39076B SPECIFICATIONS Dimensions: Master GTI........................................................... 1.75" H x 19.00" W x 12.00" D GTI ............................................................... 1.75" H x 19.00" W x 12.00" D IAM ............................................................... 1.75" H x 19.00" W x 7.00" D Environmental: Temperature Range .............................................. 0° to 70° C (32° to 158° F) Relative Humidity ....................................
LBI-39076B INTRODUCTION / DESCRIPTION INTRODUCTION DESCRIPTION OVERVIEW This manual describes the installation, configuration, and operation of the Enhanced Local Interconnect (ELI) option. A companion manual, the Global Telephone Interconnect (GTI) Configurator user's guide (LBI-39077), describes how to use the GTI Configurator software to configure the GTI units.
DESCRIPTION The Site Controller computer directs up to 16 levels of toll call restrictions, up to 15 rotary hunt sequences, 8 dequeuing priority levels, and inbound interconnect enable/disable assignments, for each ID number. It also accumulates interconnect call activity data for the System Manager.
LBI-39076B DESCRIPTION / INSTALLATION The telephone line interface provides the following functions for radio-originated calls: • Applies signaling to seize telephone line. • Detects signaling from telephone line. • Record Type • Generates and applies telephone number digits to telephone line. • Start Time • • Elapsed Time Sends voice prompts to telephone line. • • Call Type Detects end-of-call signaling from telephone line. • • Radio User ID Removes signaling to drop telephone line.
INSTALLATION LBI-39076B Table 1 - Sequence of Installation Activities (with Step # References) EQUIP MDR Radios Site Controller Computer INSTALLATION ACTIVITIES STEP # 1 Check Software Group # 2 Verify VAX Configuration 3 Check Application Software Group # 3 Replace Personality PROMs Standard GTI Units 4 Assign Radio Chan 6 Record Software Version #s Set Up Phone Interface 7 Set DIP Switches 5 Mount with 9 Radio Chan Equip 10 Connections Master GTI 4 Assign Radio Chan 6 Record Software Ver
LBI-39076B INSTALLATION 4. 1. RADIO SOFTWARE Loosen the two fastener screws holding the back panel to the chassis (see Figure 4). The 1st step to install the ELI option applies only to MDR full-duplex radios. If you plan to use this type of radio with your ELI system, make sure each radio contains 344A4271Gx software (where x = 2 or higher). See the manual for the radio to get instructions on where to find the software and how to determine its version. Fastener Screws 2.
INSTALLATION The location of the Application Software and Personality PROMs on the PROM card is shown in Figure 7. When replacing PROMs, be sure to get each new PROM in the correct location and the notched end facing the right direction. Be especially careful of location numbers 01 and 02 since these numbers are used for both types of PROMs.
LBI-39076B INSTALLATION You may use some other method. However, using the method described here assures that the supplied cables will be the correct length and the PCM/Data Bus will be as short as possible. (The PCM/Data Bus must not exceed 120 feet in length). 5. GTI SOFTWARE The 5th step to install the ELI option is to make sure that the insulating paper tab on the battery (RAM backup) has been removed, and record the version number of all software on each board in each GTI unit.
INSTALLATION LBI-39076B Revision-D or E Main boards Software Version # NOTE Revision-D or E Main boards require version 2.x or higher GTI 552 and GTI DSP software. Do not use version 1.x GTI 552 or GTI DSP software with revision-D or E Main boards. For revision-D or E Main boards, the GTI 552 software is stored in U50 and requires version 2.x software (where x = any number) or higher. A sample label for U50 is shown in Figure 13.
LBI-39076B INSTALLATION 6. GTI TELEPHONE INTERFACE The 6th step to install the ELI option is to configure each GTI telephone interface to match the type of telephone circuit to be connected to it. The first Main boards, identified by the manufacturer’s number 702-9588A, are configured differently than the later Main boards, identified by the manufacturer’s number 702-9588D or E. The boards are referred to as revision-A Main boards and revision-D or E Main boards respectively.
INSTALLATION End-to-End, Loop Start End-to-End, Ground Start 1 2 4 Tip 5 6 JP15-A 2 Rec JP14-A Audio JP13-A Ring Det. Transformer Loop Current Det. Hybrid Ring 4 Tip 5 6 JP9-B GND Ring Det. K2 Transformer Loop Current Det. JP9-A K3 Hybrid Send Audio JP8-B JP12-B Current Det.
LBI-39076B INSTALLATION Table 3 - Configurations by Interface Characteristic (Rev A Main Board) INTERFACE CHARACTERISTIC 1 Audio Circuit 2-Wire 4-Wire 2 JUMPER POSITIONS FOR JP1 THROUGH JP15 3 4 5 6 7 8 9 10 11 12 B B A+C A+C A B Signaling Loop Start Ground Start E&M A B C+M E-Lead Reference External Reference Internal Ground Internal -48 V IN OUT OUT OUT B A B A B A A IN IN A A B IN OUT Idle M-Lead Reference External Reference Internal Ground Internal -48 V A B A IN OUT OUT not B B
INSTALLATION LBI-39076B J1 JP4 EXTERNAL M-LEAD REFERENCE 1 FUSE F2 -48 V DS1 620 OHMS M-LEAD 2 3 4.7 OHMS JP15 B A REC. B A AUDIO T1 4-WIRE SEND JP3 D A 4 C 10 B 4.7 OHMS 2-WIRE SEND/REC. OR 4-WIRE REC. JP14 RING DET. 5 JP13 A B JP10 .47 LOOP CURRENT DET. JP11 JP2 B 4.7 OHMS A T2 AUDIO HYBRID C BAL. CKT. SEND D K3 B JP9 AUDIO A A 6 JP8 C 4.7 OHMS B JP6 100 OHMS A A M D E F C D JP1 7 K2 JP5 8 E-LEAD DET.
LBI-39076B INSTALLATION chassis. The orientation of the DIP switches is shown in Figure 26. Revision-D or E Main Board The revision-D or E Main boards contain two jumpers (JP3 and JP4) and a matrix card connector (J5) to configure the telephone interface. Set the jumpers and insert the Matrix card to match the type of telephone line to be connected to it. Figure 24 shows the locations of the jumpers and the Matrix card connector.
INSTALLATION LBI-39076B Table 5 - Defined DIP Switch Settings for GTI Units BANK SW2 DIP SWITCH # 1 2 3 4 5 6 7 8 SEE PARAMETER BELOW BANK SW1 DIP SWITCH # 1 2 3 4 5 6 7 8 Telephone Line Type: 0 0 0 X X X X X 1 0 0 X X X X X 0 1 0 X X X X X No Telephone Line Connected 2-Wire End-to-End loop start 2-Wire End-to-End ground start 1 0 1 1 4-Wire 4-Wire 4-Wire 4-Wire 1 0 0 0 0 1 1 1 0 1 0 1 X X X X X X X X X X X X X X X X 1 1 0 0 X X X X 1 1 0 1 X X X X E&M E&M E&M E&M Overdial-Microwave Overdi
LBI-39076B INSTALLATION 9. GTI & IAM MOUNTING Telephone Line The 9th step to install the ELI option, is to mount the standard GTI units, the Master GTI, and optional IAM (if supplied).
INSTALLATION MASTR III Power Supply/Audio If the GTI unit is to be connected to a MASTR III repeater channel, connect a 19B803830P1 cable from the male 1x6-pin Molex connector on the back of the GTI (marked "POWER/AUDIO") to P4 on the MASTR III repeater T/R Shelf backplane, and to P801 on the repeater power supply, as shown in Figure 30. Note that the power supply end of the cable comes with pins attached to wires, but no connector shell.
LBI-39076B INSTALLATION 24-pin connector on one end, and a standard 24-pin connector on the other. To install the data bus cables, connect the IAM unit (if present) first, then the Master GTI unit, and finally the standard GTI units (from the lowest channel to the highest channel). Plug the standard connector of the first cable directly into the first unit, and the stackable connector of the first cable directly into the second unit.
INSTALLATION For a power supply connected to a MASTR II or IIe repeater, remove the existing pins in pin positions 3 and 5, and tie back. Then insert the pin on the red wire into pin position 3 and the pin on the black wire into pin position 5. Software Version # (C) ZETRON INC. IAM 2#56022 U23 LBI-39076B V1.2 601-0537 PCM/Data Bus Circuit Symbol Connect the PCM/Data bus cables as instructed in the previous section for the GTI units. Figure 35 - IAM Software Label Alarm Outputs 12.
LBI-39076B INSTALLATION be selected using DIP switch sections 2 through 4. The serial printer port can be turned off and on using DIP switch section 5. The proper handshaking protocol for your printer can be selected using DIP switch section 6. The IAM can use both hardware and software handshaking, or just software handshaking. The standard ELI option does not provide a cable for this connection, but pin-out information is shown in Figure 39. Switch section 8 is not used.
CONFIGURATION CONFIGURATION OVERVIEW The user configurable parameters for the ELI option reside in two locations: the Site Controller computer’s database and the GTI units’ database. The configuration of these two databases is covered in this section. SITE CONTROLLER DATABASE The overall operation of the ELI option is controlled by the software in the Site Controller computer and the active configuration of the Site Controller computer’s database.
LBI-39076B CONFIGURATION Similarly, other interconnect timing parameters may need upward adjustment. In addition to the dial tone detect duration, the following parameters may require changes: pulse digit delay base, pulse digit delay increment, DTMF digit delay, DTMF digit detect duration, and line dropping duration. The adjustment needed can be calculated as follows (defaults are included in Table 6).
CONFIGURATION • Line Active - This column of parameters defines (for the site) if a line is available for interconnect calls. Default is no (N) for all lines. Enter Y for yes, or leave N for no. Note that a line number gets its number from the radio channel number that shares the same GTI Unit. Also note that GTI Units are placed on the highest available channel numbers first.
LBI-39076B CONFIGURATION Who Has What Priority Who Has What Rotary Hunt Sequence • • Interconnect - This 1-digit field defines (for each logical unit ID) which of eight queuing priority levels (from 0 to 7) is to be applied to this specific logical unit ID for interconnect calls. Default is the lowest priority (0).
CONFIGURATION Who Has What Dedicated Line • Dedicated Line - This 3-digit field defines (for each logical unit ID) the line number to be dedicated to outgoing interconnect calls. Default is line 1. Enter a line number, or 0 for denial. It is recommended that you enter 0 for denial, and use unique rotary hunt sequences to define dedicated lines.
LBI-39076B CONFIGURATION Office PC GTI Unit COM Port DB-9 (M) Rx Data Tx Data DTR Signal Ground RTS CTS 19D903985P72 Cable DB-9 (F) J3 DB-9 (F) DB-9 (M) 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 Tx Data Rx Data DTR Gnd CTS RTS Figure 41 - Local GTI Connection for 9-Pin COM Port Office PC Adapter COM Port DB-25 (M) DB-25 (F) Rx Data Tx Data DTR Signal Ground 3 2 20 7 RTS CTS 4 5 GTI Unit DB-9 (M) DB-9 (F) 19D903985P72 Cable 1 2 3 4 5 6 7 8 9 J3 DB-9 (F) DB-9 (M) 1 2 3 4 5 6 7 8 9 Tx Da
OPERATION initiates a soft reset for that GTI unit only. Pushing the RESET button on the Master GTI initiates a simultaneous soft reset for all the GTI units. A simultaneous soft reset of all GTI units can also be made through the GTI Configurator software. OPERATION GTI UNITS The location of the indicators and reset button on the front panel of each GTI unit (including the Master GTI) is shown in Figure 43.
LBI-39076B OPERATION with the Master GTI within a couple of minutes of being powered-up, but in the event that it doesn’t, momentarily press the button labeled “RESET”. CDR Received Indicator The red LED labeled “CDR RECEIVED” should be lit momentarily each time a Call Detail Record is received by the IAM.
OPERATION Backup The IAM has the capacity to hold 60,000 records in battery backed RAM. Every effort has been made to ensure that this memory won’t be corrupted in normal operation. However, one must not forget about the possibly of component failure in the IAM, or more likely an external influence (such as a lightning strike, technical error, etc.) that could cause the loss of records stored in the IAM.
LBI-39076B OPERATION • Radio-originated call - a call from a radio using an EDACS repeater site, through a telephone line connected to that EDACS repeater site, to a telephone. • Line-connected GTI - the GTI unit connected to the telephone line for the interconnect call being described. • Channel-connected GTI - the GTI unit connected to the radio channel for the interconnect call being described.
OPERATION IDENTIFYING CALLED ID 13. The channel-terminating GTI detects the first DTMF digit, momentarily lights the “DTMF DETECTED” red LED on the front panel, and reports the digit to the Site Controller. 14. The Site Controller directs the line-connected GTI to stop sending a dial tone to the calling line, and starts a counter to count the received DTMF digits. 15. The Site Controller checks the first DTMF digit to see if it is a #, *, or number from 0 to 9.
LBI-39076B OPERATION PCM Data Bus (completing the audio path between the calling telephone and the called radio(s)). 28. The Site Controller directs the line-connected GTI to look for DTMF digits. ENDING THE CALL 29. To end the telephone interconnect call, the caller presses the # key on the DTMF keypad and hangs up. (If the telephone does not have a # key, the caller can just hang up.) 30.
OPERATION 2. The radio sends an interconnect call request on the Control Channel. 3. The Control Channel GETC receives the request for an interconnect call, and sends the request to the Site Controller. 4. The Site Controller receives the request for an interconnect call, and checks to see if it is permitted to add another interconnect call. (There may be a limit on the number of telephone interconnect calls allowed at any one time.
LBI-39076B OPERATION If the Dial Tone Required field is set to Y in the System Configuration of the GTI Configurator, then the absence of dial tone, for whatever line type (E&M or End-to-End), will cause the Site Controller to initiate a rotary hunt to get an available telephone line. The Site Controller will apply a rotary hunt tone to the calling radio.
MAINTENANCE MAINTENANCE LBI-39076B 4. Disconnect the Power/Audio plug from the back panel of the GTI (you will need a pair of pliers to pull the plug out of the recessed connector). 5. Disconnect the Phone plug from the back panel of the GTI. 6. (Master GTI only) Disconnect the two Site Controller data link plugs from the back panel of the Master GTI. 7. Disconnect the PCM Data Bus from the back panel of the GTI.
LBI-39076B 5. 6. MAINTENANCE (Master GTI only) Disconnect the two Site Controller data link plugs from the back of the Master GTI. Disconnect the PCM Data Bus from the back panel of the GTI. If there are two cables (or one cable and a termination) quickly reconnect the two cables (or the cable and the termination) back together without the GTI and let hang).
MAINTENANCE LBI-39076B Table 8 - Software Compatibility by Main Board Revision Number ELI EQUIPMENT CIRCUIT BOARD GTI Unit SOFTWARE PACKAGE SOFTWARE VERSION REQUIRED FOR MAIN BOARD REVISION NUMBER Revision A Revision D Revision E Main Board GTI DSP V1.00 V2.01 or V2.03 V2.01 or V2.03 Main Board GTI 552 V1.3 V2.1 or V2.3 V2.1 or V2.3 Processor Board GTI Main V1.03 V2.01 or V2.14 V2.01 or V2.14 Interface Board GTI Master V1.02 V1.02 or V1.04 V1.02 or V1.04 IAM GTI IAM V1.2 V1.
LBI-39076B • 46 Replace the GTI Master software on the GTI Interface Board with V1.04 GTI Master software. • Re-attach the top cover, and re-install in cabinet (don’t forget to fasten rear supports). • Re-connect the Power/Audio plug, Phone plug, PCM Data Bus plugs, and two Site Controller data link plugs to the back panel of the Master GTI unit. • 3.
MAINTENANCE 4. Each GTI in 1st Group (Modify 1st Group): • • • If the Main Board is Revision A, replace with a Revision D or E Main Board. • Replace the GTI DSP software on the Main Board with V2.03 GTI DSP software. • Replace the GTI 552 software on the Main Board with V2.3 GTI 552 software. • Replace the GTI Main software on the Processor Board with V2.14 GTI Main software. • Re-attach the top cover, and re-install in cabinet (don’t forget to fasten rear supports).
LBI-39076B 9. MAINTENANCE System Manager (Enable all but 2nd Group): • • Using System Manager screen 10, panel 1:4, reconfigure the “Interconnect” field to “Y” for the radio channels connected to the Master GTI unit and each GTI unit in the first group. Using System Manager screen 14, reconfigure the “Line Active” field to “Y” for the line numbers connected to the Master GTI unit and each GTI unit in the first group.
MAINTENANCE 1. 2. System Manager (Disable All): • Using System Manager screen 10, panel 1:4, reconfigure the Interconnect field to N for each radio channel. • Using System Manager screen 14, reconfigure the “Line Active” field to “N” for each line number. 3. Each Regular GTI (Disconnect Regular GTIs): • 4. (MASTR II & IIe applications only) - Add a jumper between pins 2 and 3 of the Power/Audio plug on the back panel of the GTI (see Figure 45).
LBI-39076B MAINTENANCE If the ELI system experiences problems due to the temporary disconnections, you will have to disable the ELI system through the System Manager for each temporary disconnection. • • 6. Go on to next step if you want to put GTI units back into service one at a time (suggested for first GTI units completed), or repeat this step until several GTI units have been completed before going on to the next step (suggested for last GTI units completed).
MAINTENANCE TROUBLESHOOTING 2. GTI Unit - A GTI Unit may have jumper positions that are incorrect for type of telephone line connected, DIP switch settings that are incorrect for the radio channel / line number, user-configurable parameters that are not correctly defined in the database, or no telephone line connected. 3. Interconnect Cable - An interconnect cable may be missing, be connected to the wrong connector, or have a pin pushed back in a connector.
LBI-39076B TROUBLESHOOTING Table 9 (Cont.) - Troubleshooting Symptoms SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION All radio-originated interconnect calls from all LIDs get rotary hunt tone after the dial tone is heard. The Site Controller’s personality does not contain the correct value for the Dial Tone Detect Duration parameter. If the Site Controller software is V5.60 or higher, the Dial Tone Detect Duration should be at least 1600 milliseconds.
TROUBLESHOOTING LBI-39076B Table 9 (Cont.) - Troubleshooting Symptoms SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION All telephone-originated interconnect calls are unanswered on all lines. Site Controller computer not connected to the Master GTI. Check 19B803826P1 and P2 data cable connections. Jumpers and/or DIP switches in each GTI set incorrectly for line type. Check GTI jumper locations and DIP switch positions. GTI line type database configured incorrectly for each line.
LBI-39076B TROUBLESHOOTING Table 9 (Cont.) - Troubleshooting Symptoms SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION Billing data does not contain the correct ID and channel information. Application Software in Site Controller computer does not support the ELI option. Replace the present Application Software PROMs with PROMs marked 344A3265Gx, where x=5 or higher. Personality in the Site Controller computer does not specify the ELI option.
GLOSSARY LBI-39076B GLOSSARY 2-Wire Audio Line.......................................................A 2-Wire audio line uses a single audio pair for passing audio signals in both directions. 4-Wire Audio Line.......................................................A 4-Wire audio line uses separate audio pairs for passing audio signals in both directions; one audio pair for each direction. CDR.............................................................................
LBI-39076B GLOSSARY GLOSSARY (CONT.) Ground-Start Signaling ................................................Ground-Start signaling is used to send the local off-hook and on-hook signals to the public telephone network. Off-hook is detected by the presence of a DC loop current between one of the two wires of the 2Wire audio line and ground. GTI Unit.......................................................................
GLOSSARY / PARTS LIST LBI-39076B GLOSSARY (CONT.) Radio-Originated Call..................................................A telephone interconnect call from a radio to a telephone. Site Controller Database ..............................................The Site Controller Database is the specific information about the site, such as equipment available at the site, validation tables by feature and priority for each Logical (individual) ID and Group ID, etc., maintained by the System Manager.
LBI-39076B INTERCONNECTION DIAGRAM 19C852327G1 ELI TELCO Module (EDACS Interface Panel) RJ-45 RJ-45 1 2 3 4 5 6 7 8 See Schematic Diagram for Details Phone (J1) RJ-45 RJ-45 1 13 2 14 3 15 4 16 5 17 6 18 7 19 8 20 9 21 10 22 11 23 12 24 100 Ohms 100 Ohms 100 Ohms 100 Ohms 100 Ohms 100 Ohms 100 Ohms 100 Ohms 100 Ohms 100 Ohms 100 Ohms 100 Ohms Left (J4) P4 RJ-11-6 Bus Cable Standard 2x12 Molex P8 Bit 1 Bit 2 Bit 3 PCM Data Bus Bit 5 Bit 6 Bit 7 Frame Sync Console Data bus Subscriber Data
SCHEMATIC DIAGRAM TO GTI UNIT J14 25-Pair Pair #1 TO PUNCHBLOCK OR DAISYCHAIN Pair #25 J1 RJ-45 1 2 3 4 5 6 7 8 TO GTI UNIT J2 RJ-45 1 2 3 4 5 6 7 8 LBI-39076B TO GTI UNIT J3 RJ-45 1 2 3 4 5 6 7 8 J15 25-Pair 1 26 2 27 3 28 4 29 5 30 6 31 7 32 8 33 9 34 10 35 11 36 12 37 13 38 14 39 15 40 16 41 17 42 18 43 19 44 20 45 21 46 22 47 23 48 24 49 25 50 1 26 2 27 3 28 4 29 5 30 6 31 7 32 8 33 9 34 10 35 11 36 12 37 13 38 14 39 15 40 16 41 17 42 18 43 19 44 20 45 21 46 22 47 23 48 24 49 25 50 J4 RJ-45
LBI-39076B INSTALLATION CHECKLIST INSTALLATION CHECKLIST Steps 1 through 14 parallel the main headings in the Installation section of this manual. For more details, see the heading that applies. Step 15 is covered in the Configuration section of this manual. Step 16 is covered in the User’s Guide for the GTI Configurator Software, LBI-39077. 1. RADIO SOFTWARE - If MDR full-duplex radios are to be used, check to make sure their software is G2 or higher. 2.
