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Symptom 2. Call tone does not sound.

How to check for a. and b. above.
It is possible to confirm the called station number

and the type of service signal tone by the lamp
status on HC unit.

(1) How to find the called station number (

Fig. 45)

Example for HC-62

Called station number: 249 = 200 + 32 + 16 + 1

Note. The lamp status is indicated by the binary code.

The lamp for station No. 200 does not light.

(2) Service signal tones (

in Fig. 45)

SIGNAL
CODE

TONE AND
SPEECH MODE

During Conversation
Press-to-talk
Press-to-talk

OFF duration on Continuous Calling

Calling

Privacy/Disconnected

Busy

Dialing

Zone paging
All call paging

Priority/Executive priority

Registration/Call holding/Mic-off

Fig. 46 Called Station Number and Signal

Code Indications on HC Units

— 52 —

Summary of Contents for EXES-6000

Page 1: ...TOA EXES 6000 SYSTEM TOA Corporation KOBE JAPAN...

Page 2: ...iptions of audio and dial signal flows that are a base of the system and the timing of their relative switches which are explained by using block diagrams of actual circuits The booklet is so compiled...

Page 3: ...ce Switches 2 1 Voice Switch Features of Duplex Line Unit for the EXES 5000 the EXES 1000 and the EX 16 2 2 Voice Switch Features of Duplex Link Unit for the EXES 6000 IV PAGING SIGNAL FLOW 1 Paging S...

Page 4: ...microphone are housed in a small case causing them to be located in close proximity to each other b Speaker audio output level is high c Microphone is very sensitive Fig 1 Hands free System 1 2 Voice...

Page 5: ...s the crossbar method which corres ponds to space division method in the classifica tion of speech path The space division method is mentioned in the next section 2 3 This method however has both the...

Page 6: ...hes in total b Time Division Method Fig 6 Time Division Method 8 lines 2 links The method adopted in the EXES 6000 system All stations are connected by one of each of transmitting and receiving bus li...

Page 7: ...s having periodic intervals Fig 7 b the analog signal Fig 7 a is converted into such PAM signal as is shown in Fig 7 c However the real pulse intervals are so short that the spurious original analog s...

Page 8: ...re eliminated through the lowpass filter 3 Through processes 1 and 2 the PAM signal is demodulated into such a waveform as is shown in Fig 9 3 which is identical with the original analog signal 3 4 Sa...

Page 9: ...4 2 Access to Time Division Multiplex In Fig 11 a at the right hand side consider just how many lines are needed to transmit 4 different signals A B C and D to the outputs 1 2 3 and 4 respectively 1...

Page 10: ...of analog switches x and y is sequenced in the following order When the analog switches x1 and y1 synchro nized with each other are on the signal A is allowed to go through to the output 1 and likewis...

Page 11: ...ange Block Diagram 4 lines 2 links Shown below is the timing of each analog switch when a conversation is being made between stations A and C using LINK No 1 in the above Fig 13 Voice signal flow Mic...

Page 12: ...pacitor in order to be demodulated into the original voice signal See section 3 3 Demodulation of PAM Signal Timing 2 3 Switches Tx3 and Ry3 close at this timing Marked in green in the Figs 13 and 14...

Page 13: ...1 Voice Signal Flow Fig 15 Voice Signal Flow 10 II VOICE SIGNAL AND DIAL SIGNAL FLOWS...

Page 14: ...R in EXES 6000 systems when the cross connection is made between Ty1 and Rx2 and between Ty2 and Rx1 because Rx2 stays open the voice signal does not pass through highway HW R and is held in the link...

Page 15: ...to be generated in the dial pulse generator which The am is sent out to the LM unit of the exchange The dial streams are demodulated into the original pulses with a dial pulse detector in the LM unit...

Page 16: ...ising 2 10 and in the above Figure and are 2 pulses enter inverted by a transistor They then pass through the dial data bus line and go into Input Port IP No 0 of the CP unit The CP unit is cyclically...

Page 17: ...mory accord ing to the address specified by the OC unit Station numbers of the stations in converstations and the status of each link are written in the line memory of which contents become the contro...

Page 18: ...15 Fig 19 Voice and Dial Signal Flows 16...

Page 19: ...byword in synchronization with the link change over switches Ty1 Ty32 Rx1 Rx32 in the DL unit and controls the corres ponding time division switch in the LM unit according to the contents of the data...

Page 20: ...202 are engaged in a conversation using link No 1 Table of Service Signal Tones 18 T R R T Duplex Calling tone Privacy tone Busy tone Dial tone Zone paging preannounce ment tone All call paging prean...

Page 21: ...6000 system The voice switch circuit mentioned here is an improved version of one that is used in the EXES 5000 system The voice switch is employed in the DL unit and its operations differ depending...

Page 22: ...ssion of the signal from mic A signal A to speaker B At the same time ATT B is activated and the signal from mic B attenuated by ATT B is trans mitted to the comparator In this event ATT A is not acti...

Page 23: ...he voice signal is sent out from station B which is similarly transmitted to the DL unit 3 The 40Hz handset mode signal from station A preceeds to 40Hz SIGNAL DETECTOR A and its output level becomes h...

Page 24: ...oice through a handset ear speaker In the case of the conversation mode used in this section a voice spoken into the mic of station A comes out of the speaker of station B But now that station B is in...

Page 25: ...z SIGNAL DETECTOR B resulting in a high level output at the both detectors Similarly each of the both voice signals is transmitted to VOICE SWITCH A and B respectively via HPF The status of logic elem...

Page 26: ...vel Subject to pulsive noise typewriter etc and unstable operation in conversation Acoustic feedback by echo or reverbration may cause the circuit to malfunction 2 2 Voice Switch Features of Duplex Li...

Page 27: ...Stations To have the paging function in the EXES 6000 system use a PA amplifier and external speaker instead of station B in Fig 28 The PI unit is required as interface for this purpose Refer to Fig 2...

Page 28: ...e using the station speakers In this event only one way speech path is formed from the paging station mic to the paged station speakers See Fig 30 Fig 30 Voice Signal Flow of Station Paging and Zone P...

Page 29: ...P1 P7 through jumper wire JW and becomes an all call An incoming paging signal takes 2 separate courses at each zone output of the PI unit and one goes to each output section in the LM unit via an as...

Page 30: ...from mic of station No 204 passes through Tx5 HW T Ty1 and is transmitted to link No 1 where it is held 2 Rx2 and Py0 close at the next timing and the voice that has been held passes through Rx2 HW R...

Page 31: ...Fig 32 Zone Paging Signal Flow 29...

Page 32: ...Fig 33 All Call Paging Signal Flow 30...

Page 33: ...Fig 34 Station Paging Zone Assignment EX 630 31 32 2 Connection for Station Paging Group Paging...

Page 34: ...nput of the SA unit needs to be connected to the first or last station number of the LM unit In this example the input PAGING No 1 is con nected to station No 200 PAGING No 2 to station No 207 and PAG...

Page 35: ...Examplewhen One Station is in Conference Supposing station A alone is speaking the voice signal flows as follows Timing 1 Station A s mic HW T HPF Voice switch A Voice is held Timing 2 Mixing point B...

Page 36: ...B to D are made L As a result voice switch A alone turns on and other voice switches B to D are off Consider another example where both stations A and D are speaking See Fig 37 2 Example when Two Stat...

Page 37: ...8 Dial pulse stream generated in station No 200 is sent to the LM It is detected by the dial pulse detector in the LM and transmitted to the CP Station key number Pulse number The CP generates a pulse...

Page 38: ...nd Ly1 close Link No 1 Rx2 HW R Ly1 Tl The PAM signal is demodulated into the analog voice signal in the Tl unit which passes through tie line link No 1 and flows to the data receiving audio signal tr...

Page 39: ...EXCHANGE A No 200 327 EXCHANGE B No 470 597 38 39...

Page 40: ...panel Calling party indicator panel lamp type When the called station having the indicator panel receives a call the calling station number is indicated by the lamp until the conversation is over or w...

Page 41: ...nected in parallel per exchange It is possible to determine the channel number of the unit by setting the DIP switch on the PC board inside the unit See Fig 40 The function that corresponds with the c...

Page 42: ...seconds Personal in and out registration can be accomplished at any Master station by using personal numbers max 100 IN OUT annunciations may be done Make output 100 contacts is available for pager co...

Page 43: ...obtained Clear ope ration makes all 8 relays break Make output 100 contacts is available for pager control One contact out of 8 selectable make outputs is obtained for about 1 or 2 seconds 10 Selectab...

Page 44: ...ontact out of 8 selectable make outputs is obtained Clear opera tion makes all 8 relays break 1 Make Break contacts can be available at any Master station 1 One shot make contacts can be avail able at...

Page 45: ...Decimal Outputs are available with 7 segments LEDs One contact out of 8 selectable make outputs is obtained Clear ope ration makes all 8 relays break When a station with a Display Board is called call...

Page 46: ...ing a case where all the 16 DR units have word 0 Since the output data function corresponding to each channel varies according to the CP unit to be used refer to the EXPLANATION OF DATA RECEIVING UNIT...

Page 47: ...Fig 41 System Block Diagram of Data Transmitting and Receiving Units in CP 6 4 System 47...

Page 48: ...elay OFF and 1 for relay ON The simplest way of controlling the indicator or controller by the content of the data is to directly connect between each 1 bit data and the device via a cable The total n...

Page 49: ...start and the end data are added to the beginning and the end of the P E data respectively so that the DR unit may know the start and the end of data reception See of Fig 44 The P E data pulse is tran...

Page 50: ...Fig 44 Contents of Data from CPU and Conversion Process into Transmitting Signal FSK 50...

Page 51: ...If replacing the card still does not remedy the symptom try to find the other suspicious card by following the signal flow from the input through reference to the fore going sections of this booklet T...

Page 52: ...mber 249 200 32 16 1 Note The lamp status is indicated by the binary code The lamp for station No 200 does not light 2 Service signal tones in Fig 45 SIGNAL CODE TONE AND SPEECH MODE During Conversati...

Page 53: ...h the LINK BUSY lamps of the HC unit See Fig 46 d Check the voice distortion by actually making conversation e Terminate the conversation by depressing C button on the calling station f Follow the pro...

Page 54: ...if this calling tone is distorted e Terminate the call by depressing C button on the calling station f Follow the procedures b to e for 16 times the total number of links by using the same stations In...

Page 55: ...the exchange procedures written into the memory ROM and collates the data from stations for processing in succession CROSS BAR SWITCH A switch having a plurality of vertical paths a plurality of hori...

Page 56: ...ltaneously Also called semi duplex transmission HC Highway Control Unit Turns on and off the time division switches at the LM DL and SG units according to instructions received from the CP unit The li...

Page 57: ...as 1 and the change from positive to negative as 0 This method applies to data transmitting and receiving system in EXES 6000 system PI Paging Interface Unit Provides paging functions of PA paging and...

Page 58: ...called Serial To Parallel Conversion SG Signal Generating and Distributing Unit Composed of 8 kinds of signal generators calling privacy disconnected busy dialing zone paging all call priority executi...

Page 59: ...and each active input is associated with the desired output for a specific phase of the period VCO Voltage Controlled Oscillator A oscillator whose oscillating frequency is varied with applied voltage...

Page 60: ...TOA Corporation KOBE JAPAN No 833 72 051 30 EGA09101100E Printed in Japan...

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