AN230_intl_Radio Relay Vocality to Vocality_v1.5
Contents
1. 3 of 6 Vocality Application Note AN230 Radio Relay Vocality v1 5 In the above example Port 1 on one unit is mapped simply to Port 1 on the other so the destinations on Node 1 will be 2 0 1 2 0 2 2 0 3 and 2 0 4 and the destinations on Node 2 will be 1 0 1 1 0 2 1 0 3 and 1 0 4 E amp M Signalling and Circuit Activation E amp M is a type of supervisory line signalling that uses DC signals on separate leads called the E lead and M lead traditionally used in the telecommunications industry between telephone switches Four Wire or Radio Relay provides E and M signal leads on the 4 wire interfaces as a means to allow attached equipment to e Signal when a 4 wire circuit should be activated e Detect when a circuit has been activated by the distant end The following diagram shows how the leads are presented See Appendix for Pin Assignments detail 5V o MREF EREF Figure 6 E and M signalling The input M circuit has an internal impedance of 15k ohms and is referenced internally to 5V It can be stimulated by keying the M lead to any voltage in the range 1 0 to 48V In practical terms this means that a PABX chassis ground or 48V reference are both acceptable It is also permissible to apply a contact closure between M and MREF to stimulate the function The output signal is provided as a contact closure between the E lead and the EREF lead The active state is a make Radio2. Options gt System menu to set basic settings for the node such as node name Chassis 000 S0plus Multiplexer Supervisor Agg Status SYSTEM OPTIONS SYSTEM NODE NAME NODE ID CONFIGURATION BY REMOTE Enabled MLPP COMPATIBILITY OFF REMOTE MGMT ENCRYPT KEY COUNTRY DE PROGRESS TONES Country CONNECTION TIMEOUT 10 seconds RECEIVE READY FILTER 1 seconds ACTIVITY TIMEOUT seconds DATA CHANNEL ACTIVATION Auto TRIE RETRY DELAY seconds DATA CHANNEL FLAG Always On BACKUP TIMER seconds TIE LINE ACTIVATION M Lead ASYNC BUFFER SIZE 32 buffers FALLBACK TIMER seconds JITTER TOLERANCE ms Enter Text Figure 2 System Options gt System menu for Node 1 The IP gt Networks menu will allow you to set IP address gateway for the four wire radio relay ports Note If the units are to be assigned IP addresses in different IP subnets then you will need to enter the IP address of the local gateway router in the DEFAULT GATEWAY field Nodel BASICS Agg Status ADVANCED CONFIG IF NETWORK J ETHERNET MODE eo TONEGOTIATE UPLINE CHANNEL IP ADDRESS IP ADDRESS MASE DEFAULT GATEWAY DNS SERVER PRIMARY SECONDARY PASSTHROUGH ENABLED Use lt SPACE gt or to select Figure 3 IP gt Networks menu for Node 1 Page 2 of 6 Vocality Application Note AN230 Radio Relay Vocality v1 5 The IP gt Tunnels gt IP Aggregates menu will allow you to configure IP aggregate settings for the f
3. Relay You need to set the System menu Tie Line activation option under the Advanced Config menu to M Lead default setting then the 4 wire circuit will be activated and will reserve bandwidth over the aggregate connection whenever the M lead is keyed At the same time the E lead on the remote destination port will be activated to signal to the remote equipment that the circuit has been activated These E amp M leads can be used to control a remote 2 way radio as shown below Page 4 of 6 Vocality Application Note AN230 Radio Relay Vocality v1 5 E ToRadio PIT Tx To Radio Audio Im Mic AUDIO Rx From Radio Audio Gut Spaaker Te E MI m Fram Radio Carmer detect or Squedch Receive activity MREEF Indicator oe L to REF g Figure 7 E amp M leads used to control a remote 2 way radio Many radios designed for this type of application will have a suitable 4 wire E amp M interface presented on an RJ45 connector In this case a straight cable can be used to connect the radio to the Vocality BASICS Hybrid Audio port or BASICS Four Wire or Radio Relay unit Similarly the radio controller will usually present a 4 wire E amp M interface for connection to the Vocality BASICS Hybrid Audio port or BASICS Four Wire or Radio Relay unit In earlier software versions TTY commands needed to be issued in order to set damping factors and simple duplex mode Refer to the section Radio Relay using TTY command
4. LEAD 500 The units used are milliseconds and the default value is 0 If a non zero value is used any transition from silent to active again will cause the timer to reset RXSUPRESS When relaying push to talk radio signals asserting the E lead causes the radio to begin transmitting de asserting the E lead causes the radio to switch back to receive With many radio sets the transition back to receive will produce a burst of noise which will be sent back to the distant end and can cause the remote port to transition to transmit creating a ping pong effect where each radio continually switches between Tx and Rx This setting allows you to configure the voice port to not pass any received data for a period of time after the de assertion of the E lead The syntax of the command is nodename VCHAN 0 1 RXSUPRESS 1000 The value is in milliseconds RXMUTE This setting suppresses the received voice when the outgoing E lead is activated on the tie line port This effectively makes the port operate in a half duplex mode The syntax of the command is nodename VCHAN 0 1 RXMUTE ONTX OFF About Application Notes Application Notes are intended as a supplement to rather than a substitute for your User Manual Should you have queries which are not answered by our current documentation your local Vocality support team would be happy to hear from you E mail support vocality com Page 6 of 6 Vocality Application Note AN230 Ra
5. ay interface A microphone can however be connected directly to the Audio ports for the BASICS Hybrid so long as the ports are configured to expect a microphone input on the Analogue Voice gt Advanced settings menu Please note that there is a maximum Page 5 of 6 Vocality Application Note AN230 Radio Relay Vocality v1 5 Y microphone level input without distortion with gain setting 28 3dB input which on the output is 150mVpk pk single ended This completes the radio relay setup procedure Radio Relay using TTY commands advanced settings The commands below are a starting point for initial setup and testing of radio relay To learn more about TTY commands refer to your User Manual You may want to adjust these settings to find the highest quality audio e DAMPELEAD e RXSUPRESS e RXMUTE On BASICS Hybrid these parameters are included on the Analogue Voice gt Advanced settings menu DAMPELEAD This feature allows you to filter out transient periods of silence preventing excessive assertion and de assertion of the E lead When the node is configured to operate in one of the Voice Detect tie line modes this setting allows you to configure the amount of time over which silence can be continuously detected before the E lead is de asserted A value of O will cause the E lead to be de asserted immediately on receipt of an indication of silence detection The syntax of the command is nodename VCHAN 0 1 DAMPE
6. dio Relay Vocality v1 5 Y Pin out information for the audio connector Pin No Signal Name Signal Type 1 MREF GND 2 M Input 3 RX Input 4 TX Output 5 TX Output 6 RX Input 7 E Contact closure 8 EREF Contact closure Table 1 Voice ports 1 4 8 way RJ45 analogue voice pinout Page A 1 Vocality Application Note AN230 Radio Relay Vocality v1 5 Y Audio Port Specification Number of channels 2 standard expandable to 4 by Feature Key Interfaces 4 wire Tie line with Type V E amp M keying activation and loop output G 723 1 5 3 6 3kbps MP MLQ G 729 Annex A 8kbps CS ACELP G 726 16 40kbps ADPCM Compton G 727 16 40kbps E ADPCM G 711 64kbps PCM p law or A law Relays DTMF Signalling MFR1 R2 R3 SS4 SS5 Call Progress Echo cancellation G 168 adaptive 16 32mS tail Coding delay Per algorithm Gain 31dB programmable in 1dB Table 2 Extract from BASICS Four Wire BASICS Radio Relay datasheet Page B 1
7. our wire radio relay ports Chassis 000 200 Multiplexer Supervisor Agg Status IP TUNNELS IP AGGREGATES AGG TO EDIT VIEW DESCRIPTION IPAgg00 SOURCE OVERRIDE PEER ADDRESS 192 168 0 UDP PORT 10000 MODE PERMANENT IPSEC RATE 1024000 IP CIR 129400 LANE PROFILE DEFAULT LANE IX CLOCK SETUP DELAY SETUP IDLE TIME AUTHENTICATION DIAGNOSTICS LOG lt ADD AGG gt lt DELETE AGG gt lt NEAT CHANNEL gt Configuration 1 is active Use lt SPACE gt or to select Figure 4 IP gt Tunnels gt IP Aggregates menu for Node 1 The RATE should be set to an appropriate speed according to your choice of voice codec and the number of circuits to be simultaneously active not forgetting to add an allowance for overheads such as IP headers and signalling Under the Analogue Voice gt Analogue Ports menu you can set the Destination for each port as well as the voice compression algorithm to be applied to each channel Chassis 000 200 Multiplexer Supervisor Agg Status ANALOGUE VOICE ANALOGUE PORTS Silence Resyd Gain Algorithm Suppress BW In Cut estination G 7294 8K OFF 000 dB 0AB 0 1 729A BE OFF 000 dB OdEB 20 2 8K OFF 000 dB 0AB 70 3 4 G G 72 G 729A 8K OFF 8000 ode odB 20 Figure 5 Setting port destinations for Node 1 You will need to repeat all these steps to set up Node 2 this time with IP address 192 168 0 200 and peer address 192 168 0 199 Page
8. s advanced settings below Circuit activation by detection of voice An alternative to using the E amp M leads to activate the channels is to use voice detection Automatic voice activation mode may simplify the interconnection requirements between the Vocality unit and the radio In this mode the channel is activated and the remote E lead asserted whenever an audio signal is detected by the BASICS Hybrid or Four Wire or Radio Relay unit Two modes are possible e Voice detect M lead Requires both the M lead to be asserted and presence of audio e Voice detect Auto Only requires the presence of an audio signal The choice of mode is made using the Tie Line Activation parameter on the System menu Audio levels Impedance of Rx and Tx lines 600ohms nominal Maximum input level 6V pk pk 2 12Vrms 8 75dBm Maximum output level 7V pk pk 2 47Vrms 10dBm Conversion Notes To convert Peak to RMS voltages Vrms 0 3535 Vpp P dBm 101 77 R x To convert RMS Voltage to dBm Ca 054 0 Po where Po is the reference wattage and is ImW or 1x10 watts R is the impedance in this case 600ohms To ensure correct operation of the voice detection function and to avoid degradation of the signal noise ratio a minimum level of 1V pk pk is recommended This corresponds to about 8dBm in a 600 ohm system It is therefore not recommended to connect an unamplified microphone directly to the Four Wire or Radio Rel
9. vocality Efficient Networks GY Radio Relay Vocality to Vocality Application Note AN230 Revision v1 5 November 2013 Vocality Application Note AN230 Radio Relay Vocality v1 5 AN230 Radio relay Vocality to Vocality Overview This Application Note describes how you can set up two Vocality BASICS Hybrid BASICS Four Wire or Radio Relay units for Radio Relay applications In this context Radio Relay is taken to mean the interconnection of a radio controller with a remote 2 way radio or the interconnection of two 2 way radios Equipment Vocality units provide two four or eight audio interfaces with E amp M signalling Each unit is provided with a WAN UPNLK or ENET1 Ethernet connector for connection to a distant unit BASICS 4 W Node1 BASICS 4W 192 168 0 200 Node2 amp 192 168 0 199 A 4 x 4Wire interfaces 4 ins interfaces Port numbers Port numbers 1 0 1 2 0 1 be 2 0 2 0 2 0 3 1 0 4 2 0 4 Figure 1 Example radio relay using two BASICS four wire units Setup If you are in Push Config mode you will need to go to the BASICS Start up Configuration menu and place your cursor on the MODE field Press lt Spacebar gt to toggle from Push Config to Normal mode Press lt Esc gt then lt Y gt to save the changes The full Main menu is then displayed Page 1 of 6 Vocality Application Note AN230 Radio Relay Vocality v1 5 You start under the Advanced Config menu at the System
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