Tetra Radio Systems

Product Range

When you choose TETRA radios for your organisation you want to be sure that they will perform well in all the situations your users encounter. Versatility, ease of use, resilience and cost-effectiveness will be high on your list of priorities. Look no further than the Sepura range of truly international, feature-rich hand-held TETRA radios, with support for many languages and frequencies

They are the smallest and lightest hand-helds you can buy, yet rugged enough to withstand the rigours of field operation. Their performance is without question, having been proven in over a billion hours of successful operation. What is more, programmable keys, a choice of screen types and GPS functionality, together with the wide range of accessories available, mean that you can customize your Sepura hand-held to meet the needs of your operation exactly.

Our radios need little training to operate and are highly reliable. They share the standard Sepura user interface, and support tools and many accessories are common across the range, making them highly cost-effective in a mixed fleet.

Easy to use

• Intuitive, multi-lingual user interface offers large-text option and clear menu structure for fast operation in the field
• Full keypad with programmable soft-keys, dedicated mode button and navigation knob makes accessing functions simple
• Large push-to-talk button is easy to use even wearing gloves and separate from the other keys so nothing else can be pressed by mistake
• Battery can be changed with one hand; standard and high-capacity versions available

Effective communication

• High-quality speaker and microphone that transmits voice clearly and loudly to suit most operating environments
• Dual speakers and microphones for duplex and press-to-talk calls
• Built-in audio processor that isolates voice from background noise for maximum clarity
• Supports packet data as well as voice, and status and SDS data services
• Supports advanced applications, in conjunction with another device, such as a PDA
• Handset displays time to full charge to help planning

Secure communication

• Supports end-to-end encryption to protect information in transit
• Has two tamper-proof processors to prevent a security breach

Protected

• Dedicated emergency button is fully configurable to:
  o Transmit location, from the sGPS version, to get help to the right place, fast
  o Transmit voice with a priority signal to alert colleagues and the control centre
• Switch access to emergency call or a lone-worker alert
• sGPS option enables staff to be tracked wherever they go, for maximum safety and better deployment of resources

Cost-effective

• Common accessories and support tools allow sharing and reduce the investment required
• Standard user interface minimises user training and improves productivity
  

Control-room and in-vehicle radios are at the epicentre of your operation. And data functionality will be as important as voice to keep essential information flowing and decision-making timely and accurate.

When you choose Sepura's mobile radios you are assured of a reliable hub for your communications. All Sepura radios share our standard user interface so that users need little training to make best use of the comprehensive functionality. A range of mounting options make them suitable in trains, planes, emergency vehicles, cars and on the desktops while optional GPS functionality will enable you to track and better deploy your field force. They can be configured for one, two or no consoles and offer a high number of data ports so you can run the applications that drive your operation easily.

With up to 10W of power, our mobiles will provide coverage at greater distances from TETRA base stations. And when set to gateway mode, the RSG3500 can extend the coverage of your TETRA communication still further.

Easy to use

• Large-mode text option for even greater legibility at a glance
• Multi-language support
• Clear 6-line black and white display with white backlight makes information easy to read; clear visual indications of call status
• Screen colour changes in an emergency
• Navi knob for quick access to volume, status and group settings, as well as rapid access to features though a full keypad with 14 programmable soft keys

Flexible

• Match operational requirements with the widest choice of simultaneous connections:
  o Single, dual or no console configurations
  o Dual data ports
  o 8 I/O lines
  o Open standard PEI ports
• Can be mounted in vehicles, covert vehicles, motorcycles, marine vehicles and on desks

Secure

• Equipped with voice and data security to increase personal safety, including:
  
o Dedicated emergency button to summon help, which works with GPS (when fitted) to transmit location    information
o End-to-end encryption of voice and data traffic to reduce the risk of interception, protected by tamper-proof    processors
o Integral SIM connector for Smart Card solution

Cost-effective

• Common accessories and support tools allow sharing and reduce the investment required
• Standard user interface minimises user training and improves productivity

Trackable (with GPS option)

• GSP version enables location-based functionality
• By tracking your personnel you can better deploy your resources and assure their safety

Powerful gateway (available with the SRG3500)

• Offers gateway and repeater functionality in addition to full mobile radio capabilities
• Up to 10W gateway functionality for maximum range
• Extends TETRA coverage, when in gateway mode, linking direct mode and trunked mode coverage for voice, data, location and emergency communications
• Increases the useful range of direct-mode-talk groups in repeater mode
  

SRC3300 and SRC3300 sGPS Covert radios

When stealth can make the world of difference to the success of an operation, the SRC3300 should be your choice of hand-held radio. Small, light and with no display, sounds or interface that might give away its presence, the SRC3300 is the world’s best-selling covert operations terminal.

Worn on the body and controlled by a small remote control unit that fits in the palm, the SRC3300 is very discreet. It includes end-to-end encryption, emergency alarm, tone signal and long battery life to suit the needs of staff in military, police and anti-terrorist scenarios.

The SRC3300 sGPS features Sepura’s award-winning sGPS receiver to maximise each operative’s safety with location tracking.
Highlights

• Small, light and unobtrusive
• Compatible with Sepura specialist covert accessories
• Compatible with the wide range of accessories available for other Sepura Hand-helds making it a cost-effective covert radio for mixed fleets.
• Controlled by a small remote control unit
• End-to-end security architecture
• Fully featured radio complete with top group functionality
• Supports advanced voice services including talk groups

DMO Repeater

Achieve greater range with the Sepura DMO Repeater functionality. This feature enables a Sepura terminal to ‘repeat’ received voice and data calls giving greater effective range to the participating terminals. Uniquely available on handheld, covert and gateway radios this licensed feature can be enabled whenever necessary using Radio Manager.


Note:
The greatest DMO range will be achieved using the SRG3500 which can operate at 10W transmit power.

Highlights:

• Extends range and enhances the reliability of Direct Mode communication compared with basic direct MS-to-MS communication
• Voice and data communications - repeats voice, SDS and status
• Emergency calls through the repeater
• Repeats E2E encrypted calls
• Voice Call Pre-emption
• Repeat individual calls
• Listen and talk when acting as a DMO Repeater (Call Participation)
• Fast and easy selection of DMO Repeater mode
• Uniquely available throughout the range on hand-held, covert and gateway radios
• Configurable DMO Repeater power level
• Efficient use of scarce direct mode spectrum – uses only one frequency (Type 1A)

Typical usage:

• Industrial installations to give coverage for a factory
• Confined space, tunnels, basements etc
• Emergency radio systems
• Roaming into public buildings
• Any scenario where DMO is used

Accessories

S-Link Wireless Adapter

The Sepura S-link enables Sepura 2000 and 3000 series hand-held terminals to connect to any commercial Bluetooth device giving users access to a massive range of wireless accessories. The adaptor also allows Bluetooth wireless connectivity to applications running on PC’s and PDA’s.

Highlights:

• Works on all Sepura Hand-held radios; SRP2000 and SRH3x00
• No software upgrade required
• Secure fixing to the base of the radio using the lockable facility connector
• The S-link is designed to allow the radio to stand upright
• Secure ‘non-discoverable’ mode of operation
• Three modes of operation – voice, serial port access, packet data
• Battery changeover is unaffected
• Bluetooth class2 – effective range of 10metres
  

TetraFlex® is the smart, flexible, scalable and affordable way to TETRA!

TetraFlex® is a global brand with unique and innovative capabilities setting new standards for TETRA systems. TetraFlex® is developed for industries and organisations with a high demand for reliable communication and future-orientated solutions. TetraFlex® can grow and expand in line with your requirements change. Regardless your choice of a single site or a multi site system, WWSI supplies high-quality TETRA solutions. TetraFlex® is the complete system that includes all the integrated hardware and software functions you need. Even mounting tools are included for outdoor units, making it easy to install sites on walls, in small, local or rural areas or even to install it in a vehicle.

Smart

TetraFlex® is the smart choice in digital radio communication, regardless of whether you need a single site system, multi sites or if leaping from analogue technology to TETRA. TetraFlex® is 100% based on IP technology which connects the site controller, base stations, dispatchers, network management facilities and external gateways in one state-of-the-art infrastructure. Using the IP technology you can monitor the entire network, manage subscribers, operate the sites and much more regardless of where you are in the world. The only thing you need is an IP connection.

Scalable

TetraFlex® became world-famous as the small and intelligent single site solution used for local TETRA coverage. With the latest developments TetraFlex® can do so much more than that! If your requirement is for more than a single site system, TetraFlex® can easily be expanded with scalable software to a highly professional multi site system. Within the capability of TetraFlex® you can start small and expand step by step as your requirement increases or until the desired capacity has been achieved. We call it scalable TETRA.

Affordable

Yet here is the biggest surprise of all: TetraFlex® offers the best price/performance ratio in the business. It is priced far lower than other TETRA systems on the market offering the same capability.

Description

Terrestrial Trunked Radio(TETRA) is a specialist professional mobile radio and two-way transceiver (colloquially known as a walkie talkie) specification. TETRA was specifically designed for use by government agencies, emergency services, (police forces, fire departments, ambulance), rail transportation staff, transport services and the military.
TETRA is an ETSI standard, first version published 1995. TETRA is endorsed by the European Radio Communications Committee (ERC) and mandated for use in Europe.

The common mode of operation for them is in a group calling mode in which a single button push will connect the user to the users in a selected call group and/or a dispatcher. It is also possible for the terminal to act as a one-to-one walkie talkie but without the normal range limitation since the call still uses the network. If enabled by the Subscriber Management TETRA terminals can act as mobile phones (cell phones), with a full-duplex direct connection to other TETRA Users or the PSTN. Emergency buttons, provided on the terminals, enable the users to transmit emergency signals, to the dispatcher, overriding any other activity taking place at the same time.

TETRA uses Time Division Multiple Access (TDMA) with four user channels on one radio carrier and 25 kHz spacing between carriers. Both point-to-point and point-to-multipoint transfer can be used. Digital data transmission is also included in the standard though at a low data rate.

TETRA Mobile Stations (MS) can communicate Direct Mode or using Trunked infrastructure (Switching and Management Infrastructure or SwMI) made of TETRA Base Stations (TBS). As well as allowing direct communications in situations where network coverage is not available, Direct Mode or DMO also includes the possibility of using one (or a chain) of TETRA terminals as relays for a signal. This functionality is called DMO gateway (from DMO to TMO) or DMO Repeater (DMO to DMO). In Emergency situations this feature allows direct communications underground or in areas of bad coverage.

In addition to voice and dispatch services, the TETRA system supports several types of data communication. Status messages and short data services (SDS) are provided over the system's main control channel, while Packet Data or Circuit switched data communication uses specifically assigned traffic channels.

TETRA provides Authentication Mechanisms of Terminals towards Infrastructure and vice versa. For protection against eavesdropping, over the air encryption and end-to-end encryption is available.

Advantages of TETRA

The main advantages of TETRA over other technologies (such as GSM) are:

• The much lower frequency used gives longer range, which in turn permits very high levels of geographic coverage with a smaller number of transmitters, thus cutting infrastructure costs.
• High spectral efficiency - 4 channels in 25 kHz and no guard bands, compared to GSM with 8 channels in 200 kHz and guard bands.
• Very fast call set-up - a one to many group call is generally set-up within 0.5 seconds (typical less than 250 msec for a single node call) compared with the many seconds (typically 7 to 10s) that are required for a GSM network.
• Works at high speeds >400 km/h. TETRA was used during the French TGV train speed record on 3 April 2007 at 574.8 km/h.
• The system contains several mechanisms, designed into the protocols and radio parameters, to ensure communication success even during overload situations (e.g. during major public events or disaster situations), thus calls will always get through unlike in cellular systems. The system also supports a range of emergency calling modes.
• TETRA infrastructure is usually separate from (but connected to) that of the public (mobile) phone networks, resulting in (normally) no call charges for the system owners, substantially more diverse and resilient communications and it is easy to customise and integrate with data applications (vehicle location, GIS databases, dispatch systems etc).
• Unlike most cellular technologies, TETRA networks typically provide a number of fall-back modes such as the ability for a base station to process local calls. So called Mission Critical networks can be built with TETRA where all aspects are fail-safe/multiple-redundant.
• In the absence of a network mobiles/portables can use 'direct mode' whereby they share channels directly (walkie-talkie mode).
• Gateway mode - where a single mobile with connection to the network can act as a relay for other nearby mobiles that are out of range of the infrastructure.
• TETRA also provides a point-to-point function that traditional analogue emergency services radio systems did not provide. This enables users to have a one-to-one trunked 'radio' link between sets without the need for the direct involvement of a control room operator/dispatcher.
• Unlike the cellular technologies, which connect one subscriber to one other subscriber (one-to-one) then TETRA is built to do one-to-one, one-to-many and many-to-many. These operational modes are directly relevant to the public safety and professional users.
• TETRA supports both air-interface encryption and End-to-end encryption
• Rapid deployment (transportable) network solutions are available for disaster relief and temporary capacity provision.
• Equipment is available from many suppliers around the world, thus providing the benefits of competition
• Network solutions are available in both the older circuit-switched (telephone like) architectures and flat, IP architectures with soft (software) switches.

Propagation

The TETRA-system is in use by the public sector in the following countries

Continent	Country	Name	Agency	Status
Asia	Pakistan	Ministry of Interior	Police	In use Nationwide
	India	AD100.	Kerala Police.	In use by police - Trivandrum city.
		Military College of Telecommunication Engineering (MCTE)	Indian Army	In use at Mhow, Indore, Madhya Pradesh
	Israel	Mountain Rose.	Israel Defense Forces (IDF).	In use by IDF, country-wide.
	Hong Kong Kowloon	Canton Railway Corporation (KCRC) / Mass Transit Railway (MTR)	Transport	In use.
Africa	Sudan	Ministry of Interior	Police	In use Nationwide
Europe	Belgium	A.S.T.R.I.D
	Austria		Police, Fire, Ambulance, Local Train Company	In use in all states except Tyrol and Vorarlberg (still roll-out)
	Britain	Airwave	Police, Fire, Ambulance, Armed Forces, Highways Agency	In use by police all over the country.
	Ireland	TETRA Ireland	Police, Fire, Ambulance, Defence Forces, Civil Defence, Security of State services	Nation-wide roll-out network
	Finland	VIRVE	Police, Fire, Ambulance, Customs, Defence Forces, Security guards, Border guard	Nation-wide network
	Germany	BOS-Netz	Police, Fire, Ambulance, Customs	Roll-out
	Greece	O.T.E.	Police, Fire	Attica region
	Netherlands	C2000	Police, Fire, Ambulance	Nation-wide network
	Norway	Nødnett	Police, Fire, Ambulance	Roll-out
	Sweden	RAKEL		Roll-out
	Portugal	SIRESP	Police, Fire, Ambulance	Nation-wide Roll-out in use since 2007
	Romania	STS (Special Telecommunications Service)	Police, Fire, Search&Rescue	Nation-wide

Radio Frequencies

In South America, TETRA uses frequencies:

Emergency Systems Number Frequency Pair (MHz) Band 1 Band 2 1 380-383 390-393 2 383-385 393-395 Civil Systems Number Frequency Pair (MHz) Band 1 Band 2 1 410-420 420-430 2 870-876 915-921 3 450-460 460-470 4 385-390 395-399.9

Radio aspects

To send information TETRA uses a digital modulation scheme known as p/4 DQPSK, this is a form of phase shift keying. The symbol (baud) rate is 18,000 symbols per second, and each symbol maps to 2 bits, thus resulting in 36,000 bit/s gross. As a form of phase shift keying is used to transmit data during each burst, it would seem reasonable to expect the transmit power to be constant. However it is not. This is because the sidebands, which are essentially a repetition of the data in the main carrier's modulation, are filtered off with a sharp filter so that unnecessary spectrum is not used up. This results in an amplitude modulation and is why TETRA requires linear amplifiers. The resulting ratio of peak to mean (rms) power is 3.65 dB. If non-linear (or not-linear enough) amplifiers are used, the sidebands re-appear and cause interference on adjacent channels. Commonly used techniques for achieving the necessary linearity include cartesian loops, and adaptive predistortion.

The base stations normally transmit continuously and (simultaneously) receive continuously from various mobiles - hence they are Frequency Division Duplex. TETRA also uses TDMA (see above). The mobiles normally only transmit on 1 slot/4 and receive on 1 slot/4 so they are both Time Division and Frequency Division Duplex.
Speech signals in TETRA are sampled at 8 kbit/s and then compressed with a vocoder using a technique called ACELP (Adaptive Code Excited Linear Prediction). This creates a data stream of 4.567 kbit/s. This data stream is error-protection encoded before transmission to allow correct decoding even in noisy (erroneous) channels. The data rate after coding is 7.2 kbit/s - the capacity of a single traffic slot when used 17/18 frames.

A single slot consists of 255 usable symbols, the remaining time is used up with synchronisation sequences and turning on/off etc. A single frame consists of 4 slots, and a multiframe (whose duration is 1.02 seconds) consists of 18 frames. Hyperframes also exist, but are mostly used for providing synchronisation to encryption algorithms.
The downlink (i.e. the output of the base station) is normally a continuous transmission consisting of either specific communications with mobile(s), synchronisation or other general broadcasts. All slots are usually filled with a burst even if idle (continuous mode). Although the system uses 18 frames per second only 17 of these are used for traffic channels, with the 18th frame reserved for signaling, Short Data Service messages (like SMS in GSM) or synchronisation.

The frame structure in TETRA (17.65 frames per second = 18 frames in 1.02 seconds), consists of 18000 symbols/s / 255 symbols/slot / 4 slots/frame, and is the cause of the perceived "amplitude modulation" at 17 Hz and is especially apparent in mobiles/portables which only transmit on one slot/4. They use the remaining three slots to switch frequency to receive a burst from the base station two slots later and then return to their transmit frequency (TDMA).

Cell Re-Selection (or Hand-over) in Images

This first representation demonstrates where the SRT (Slow Reselect Threshold) the FRT (Fast Reselect Threshold) and propagation Delay exceed parameters are most likely to be. These are represented in association with the decaying radio carrier as the distance increases from the TETRA Base Station.

From this illustration, these SRT and FRT triggering points are associated to the decaying radio signal strength of the respective cell carriers. The thresholds are situated so that the cell reselection procedures occur on time and assure communication continuity for on-going communication calls.

Initial Cell Selection

The initial cell selection is performed by procedures located in the MLE and in the MAC. When the cell selection is made, and possible registration is performed, the MS (mobile station) is said to be attached to the cell. The mobile is allowed to initially select any suitable cell that has a positive C1 value, i .e. the received signal level is greater than the Minimum Rx Level for Access parameter.

The initial cell selection procedure shall ensure that the MS selects a cell in which it can reliably decode downlink data, i.e. on a main control channel (MCCH), and which has a high probability of uplink communication. The minimum conditions that shall have to be met are that C1 > 0. Access to the network shall be conditional on the successful selection of a cell.

At mobile switch on, the mobile makes its initial cell selection of one of the base stations, which indicates the initial exchanges at activation.

• Refer to EN 300 392 2 16.3.1 Activation and control of underlying MLE Service
• Note 18.5.12 Minimum RX access level

The minimum RX access level information element shall indicate the minimum received signal level required at the SwMI in a cell, either the serving cell or a neighbor cell as defined in table 18.24.

Cell Improvable

The serving cell becomes improvable when the following occurs:

• The C1 of the serving cell is below the value defined in the radio network parameter cell reselection parameters, slow reselect threshold for a period of 5 seconds, and the C1 or C2 of a neighbour cell exceeds the C1 of the serving cell by the value defined in the radio network parameter cell reselection parameters, slow reselect hysteresis for a period of 5 seconds.

Cell Usable

A neighbour cell becomes radio usable when the cell has a downlink radio connection of sufficient quality.
The following conditions must be met in order to declare a neighbour cell radio usable:

The neighbour cell has a path loss parameter C1 or C2 that is greater than the following:

(FAST_RESELECT_THRESHOLD+FAST_RESELECT_HYSTERISIS) for a period of 5 seconds, and the service level provided by the neighbour cell is higher than that of the serving cell. No successful cell reselection shall have taken place within the previous 15 seconds unless MM requests a cell reselection. The MS-MLE shall check the criterion for serving cell relinquishment as often as one neighbour cell is scanned or monitored.
The following conditions will cause the MS to rate the neighbour cell to have higher service level than the current serving cell:

• The MS subscriber class is supported on the neighbour cell but not on the serving cell.
• The neighbour cell is a priority cell and the serving cell is not.
• The neighbour cell supports a service (that is, TETRA standard speech, packet data, or encryption) that is not supported by the serving cell and the MS requires that service to be available.
• The cell service level indicates that the neighbour cell is less loaded than the serving cell.

Cell Relinquishable (Abandonable)

The serving cell becomes relinquishable when the following occurs: The C1 of the serving cell is below the value defined in the radio network parameter cell reselection parameters, fast reselect threshold, for a period of 5 seconds, and the C1 or C2 of a neighbour cell exceeds the C1 of the serving cell by the value defined in the radio network parameter cell reselection parameters, fast reselect hysteresis, for a period of 5 seconds.

No successful cell reselection shall have taken place within the previous 15 seconds unless MM (Mobility Management) requests a cell reselection. The MS-MLE shall check the criterion for serving cell relinquishment as often as one neighbour cell is scanned or monitored.

Radio Down-link Failure

When the FRT threshold is breached, the MS is in a situation where it is essential to relinquish (or abandon) the serving cell and obtain another of at least Usable quality. That is to say, the mobile station is aware that the radio signal is decaying rapidly, and must cell reselect rapidly, before communications are terminated because of radio link failure. When the mobile station radio-signal breaches the Rx Lev minimum the radio is no longer in a position to maintain acceptable communications for the user, and the radio link is broken.

Radio link failure: (C1 < 0). Using the suggested values, this would be satisfied with the Serving Cell Level below -105 dBm. Cell reselection procedures are then activated in order to find a suitable radio base station.
Infrastructure TETRA Parametres to be Verified

This table serves only as a guide.

A Virtual MMI for TETRA radio Terminals

Any given TETRA radio terminal using Java (J2ME /CLDC) based technology, provides the end user with the communication rights necessary to fulfill his or her work roll on any short duration assignment.

For Dexterity, flexibility, and evolution ability, the RATP radio engineering department, have chosen to use the open sources, Java language specification administered by Sun and the associated work groups in order to produce a transport application tool kit.

RATP TETRA MMI

Service acquisition admits different authorised agents to establish communication channels between different services by calling the service identity, and without possessing the complete knowledge of the ISSI, GSSI, or any other TETRA related communication establishment numbering plan. Service acquisition is administered through a communication rights centralised service or roll allocation server, interfaced into the TETRA core network.

In summary, the RATP TETRA MMI aims are to:

• Allow any given agent while in exercise, to exploit any given radio terminal without materiel constraint.
• Provide specific transportation application software to the RATP end-user agents. (Service Acquisition , Fraud and Aggression control)

This transport application tool-kit has been produced successfully and with TETRA communication technology and assures for the RATP transport application requirements for the future mentioned hereafter.

The Home (Main) menu presents the end user with three possibilities:

a) Service Acquisition,
b) Status SDS,
c) End user parameters

>Service Acquisition provides a means of virtually personalising the end user to any given radio terminal and onto TETRA network for the duration the end user conserves the terminal under his / her possession.

Status SDS provides the end user with a mechanism for generating a 440Hz repeating tone that signals a fraud occurrence to colleagues who are currently within the same (dynamic or static) Group Short Subscriber Identity GSSI or to a specific Individual Short Subscriber Identity, ISSI for the duration of the assignment ( an hour, a morning patrol or a given short period allocated to the assignment). The advantage being that each of the end users may attach themselves to any given terminal, and group for short durations without requiring any major reconfiguration by means of radio software programming tools. Similarly, the aggression feature functions, but with a higher tone frequency (880Hz), and with a quicker repetitious nature, so to highlight the urgency of the alert.

The Parameters tab provides an essential means to the terminal end-user allowing them to pre-configure the target (preprogrammed ISSI or GSSI ) destination communication number. With this pre-programmed destination number, the end-user shall liaise with the destination radio terminal or Roll Allocation Server, and may communicate, in the group, or into a dedicated server to which the service acquisition requests are received, preprocessed, and ultimately dispatched though the RATP TETRA core network. This simplifies the reconfiguration or recycling configuration process allowing flexibility on short assignments.

The Parameters tab also provides a means of selecting pre selected tones to match the work group requirements for the purposes of Fraud and Aggression Alerts. A possibility of selecting any given key available from the keypad to serve as an aggression or fraud quick key is also made possible though the transport application software tool kit. The RATP recommend using the Asterisk and the Hash keys for the Fraud and Aggression quick keys respectively. For the fraud and aggression tones the RATP also recommend using 440Hz slow repeating tone (blank space 500 milli-seconds) and 880Hz fast repeating tone (blank space 250 milli seconds) respectively.
The tone options are as follows: 440 Hz 620 Hz, 880Hz, 1060Hz.

The Parameters page on yet another tab provides an Aid or Help menu and finally, the last tab within parameters describes briefly the tool kit the version and the history of the transport application tool kit to date.