JPS5851663A - Trunk system for switchboard - Google Patents

Abstract

PURPOSE:To attain monitor and instruction from a supervisory desk without using an interruption connecting device, by directly connecting the supervisory desk to an exchange trunk and connecting switchboard and the supervisory desk via the exchange desk trunk. CONSTITUTION:G0-G3 of an MX pick up digital signals a1-d1 at each channel from DHW. The signals a1-d1 are converted into analog signals a2-d2 at a DA and transmitted to an AAD, which sums the analog signals at each channel for the rest channels eliminating the analog signals for one channel's share from the signals a2-d2 and produces mixed analog signals a3-d3. The signals a3-d3 are converted into mixed digital signals a4-d4 with an AD and transmitted to G4-G7. The G4-G7 transmit the signals a4-d4 as channel digital signals a5- d5. Thus, a caller, a called party and the operator can monitor calls with each other. Further, through an EX, a supervisor can communicate with the operator without being monitored by the caller and the called party.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switchboard trunk system and a switchboard trunk system in an electronic exchange having a time division network at 41.

Ma Ill is a diagram showing an example of a conventional switchboard trunk system in a Jinnotane electronic switchboard. Answer via communication paths 1 and 2 within the NW, and at the caller's request, make a 1-outgoing trunk 0 GTK call via communication path 3 to call the called party. When the called party answers, the call is received. Tell me, you must! ! After conducting a three-way call with the calling party and the called party, if any, the telephone trunk CNT and the communication path 7 in the hour-minute network NW are
Incoming trunk ICT and outgoing trunk OG via
T and the caller and called party begin a conversation.

On the other hand, in order for the supervisor at the supervisory board KBD to give instructions to the switchboard OBD handler about the exchange handling status and the required listening/talking, communication paths 4.5 and 6 must be set up in the time-sharing network N.
, and listens to the caller's message and response to the called party from the mixed trunk TWTK switchboard OBD. If the supervisor does not have the ability to be heard by the caller and called party, the switchboard OB
When giving instructions to the D exchanger, the incoming trunk ICT and outgoing trunk OCT are temporarily connected to the trunk CNTK'Iik.
Continue to replace.

As is clear from the above explanation, in the conventional switchboard trunk system, it is necessary to use a mixed trunk TWT for listening from the supervisor's KBD, and only the supervisor and the switchboard OBD operator need to use the mixed trunk TWT. Connect trunk CN for calls
It was necessary to change the connection to T. Furthermore, switchboard trunk PA
Traditionally, digital adders have been used to implement a telephone call between the calling party, the called party, and the switchboard OBD operator. #Butterfly to mix by digital adder,
It is necessary to add the digital signals having a predetermined companding characteristic back to the -I linear code, and then to make the companding characteristic again after the addition, which requires many companders, making it large and uneconomical. .

An object of the present invention is to eliminate the drawbacks of the conventional switchboard trunk system as described above, and to economically realize a switchboard trunk that allows listening and instructions from the supervisor's desk without using mixed trunks or connecting trunks. It's about doing.

The purpose of this is to provide an electronic exchange having a time-division network with a gate that extracts digital signals for each channel from II number of channels of the time-division network, and a gate that extracts digital signals for each channel from II number of channels of the time-division network, and a gate that extracts digital signals for each channel from a plurality of acid gates. A digital-to-analog converter that converts the analog signal KW for each channel and a digital-to-analog converter output a plurality of analog signals for each channel, each of which is addressed to one channel, and is added to generate a plurality of sets of mixed analog signals. an analog-gauge adder, an analog-to-digital converter that converts a plurality of mixed analog-gauge signals output from the analog-gauge adder into mixed digital signals, and an *e mixed digital signal output from the wrinkled analog-to-digital converter. a mixing circuit comprising a gate for transmitting a signal included in each mixed digital signal of the time division network to a different channel; and a mixing circuit that extracts two communication channels from the plurality of communication channels of the time division network, and extracts two communication channels for each communication channel. and a gate for converting the digital signals of the two communication paths output from the armpit shift register into the two communication paths of the time division network and transmitting the converted signals. by doing]
achieved.

Below is one of the inventions! l! The embodiment will be explained with reference to FIGS. 2 to 5. Figure 2 shows -! of the present invention. FIG. 3 is a diagram showing an example of the configuration of the switchboard trunk shown in FIG. 2, and FIG. 4 and FIG. FIG. 3 is a diagram illustrating control signals for each gate shown in FIG. Note that the same reference numerals indicate the same objects throughout the figures.The switchboard trunk PST' shown in FIG. Alternatively, by setting the communication path 9 within the time division network N from the supervisor's desk KDD while the supervisor is making a telephone call, the supervisor can directly listen to the three-party telephone call. Furthermore, the switchboard trunk PST' is capable of connecting the supervisory board KBD and the switchboard OBD independently of the connection between the incoming trunk ICT and the outgoing trunk OCT. The connection trunk CNT becomes unnecessary. As shown in Figure 3, the switchboard trunk P
8T' includes a mixing circuit MX and a one-channel switching circuit EX. Call path 1.3 within the current time division network NW
．． 2 and 9 are the lower seaway D as shown in FIG.
The voices of the calling party, the called party, the switchboard operator, and the supervisor belong to each frame F of the HW, and the voices of the calling party, the called party, the switchboard operator, and the supervisor belong to the lower highway DHWK as digital signals abI, (11 and d, respectively) for each channel. switchboard trunk P along with the communication path of
It is input to ST'. Gates GO to G of mixed circuit MX
By inputting control signals g to gs as shown in FIG. Digital signal for each path a1%bt
, ei and dl. Digital signals 11, bl, for each channel output from gates G to G,
cl and dl are digital analog to 4G converters DAK
Analog signals for each communication channel &@, by, cl and d.

and is transmitted to the analog adder AAD. The analog adder AAD consists of four sets of adders A A p.

From AADsK to p1 Analog additions a, %bt, C8 and Bd for each channel for one channel from the manually generated analog signals at, bt s eg and -3
Analog signals for each channel for the remaining 3 channels excluding t (
be, 6g%dB), (&gbc lightning, d snow), C&
*, be, dl) and (h%b1, CI) are added in analog form to form a mixed analog tag signal 1s%bss6m
and dl. Mixed analog haiku am, bm, cl and d output from analog adder AAD
, are respectively converted into mixed digital signals &4, bm, C4 and dnK by analog-to-digital converter ADK and transmitted to G4 to Q. Gate G
4 to G! By inputting control signals g to Kv synchronized with control signals g to g1 as shown in FIG. 4, each mixed digital signal J'4, bm
, C4k and d, to gate G1. 1.3 in each frame F of the upper highway as shown in FIG.
．． 2 and 9, digital signals law, b for each channel
e, eg and d.

Send as. #Call route silver digital signal 11, bm
s @w and d, respectively
Digital signal for each channel of W (1) IqJ, ds),
(al, 1lllbdl), (al, bH, (lx)
and (a,, bl-c+), the calling party, the called party, the switchboard operator, and the supervisor can each listen to the call of the other party. Furthermore, the control signal g , is always maintained at a logical value of 0, thereby preventing input of the digital signal d1 for each channel carrying the supervisor's transmission to the mixing circuit MX, and allowing the supervisor to only listen. If the supervisor needs to talk to the switchboard operator without being overheard by the calling and called parties, the control signals IIs, ga, Km and g! is always maintained at a logic value of 0, and a control signal 1m is input to G and G of the two-channel conversion circuit. The shift register SRK of the 2-channel exchange circuit EX is
．． 3.2 and 90 digital signals per channel al, bl
, The last 9 high wings DHWO, including CM and DL, are input via Bat 7 Agistra BR, but the period corresponding to the control signal G, Callway 2 and 9. Since the clock signal etk is supplied via the gate Ga, only the digital signals C8 and dl for each channel of channels 2 and 9 are stored alternately. Note that the digital signal for each channel has an 8-bit configuration, and the shift register SR also has an 8-stage configuration.At the end time t of the 8 channel 2, the digital signal c1 for each channel is accumulated in the shift register, and the shift register SR has an 8-stage configuration. The shift register 5RKU communication path 90 is held from one time tl until the start time t of the shift register 5RKU.
The digital signal d1 for each communication path is accumulated for 1 bit, and the accumulated digital signal for each communication path @1 becomes 1 bit.
Output to bits. Similarly, the digital signal d for each channel, which was held in the shift register SR until the start time t of channel 2, is the digital signal c for each channel from time t.
As 1 is accumulated for 1 bit, it is output for 1 bit.

In this way, the exchanged digital signals d1 and (11) for each communication path are output from the shift register SR corresponding to communication paths 2 and 9. #The exchanged digital signals d and al for each communication path are , the switchboard operator and the supervisor can communicate with each other via gates G controlled by control signals g, which are sent to communication paths 2 and 9 of the upper highway UHW, respectively. On the other hand, in the mixing circuit MX, the line, control signal Km s Ilm , g@
and g ma with Lugut G*, Gs -Ga and G
, is blocked, the lower highway DHW transmits the digital signal a for each calling side corresponding to communication paths l and 3.
, and S are input, and the upper HIGHWAY UH
Only the per-channel digital signals a, > and 3 corresponding to WK% channels 1 and 3 are sent out. However, since the digital signal for each communication path & includes only the digital signal for each communication path b1, and the digital signal for each communication path blFC contains only the digital signal for each communication path a, the calling party and the called party You can make phone calls with. Further, the calls between the calling party and the called party and the calls between the switchboard operator and the supervisor are carried out independently of each other.

As is clear from the above explanation, according to this embodiment, the supervisor can direct the supervisor's stand KBD to the switchboard trunk PST'! #I!
By doing so, it is possible to listen to the response of the converter OBD operator to the calling party and the called party who are connected via the switchboard trunk PST', and also to listen to the response of the converter OBD operator to the calling party and the called party who are connected via the switchboard trunk PST'.
A call is exchanged only with the switchboard OBD operator via the switchboard OBD, while the calling party and the called party can communicate independently via the switchboard trunk PST'. Furthermore, switchboard trunk P8T
' is mainly composed of an analog adder AAD, and is smaller and more economical than the case where a gagetal adder is used.

2 to 5 are merely one embodiment of the present invention. For example, the communication paths 1, 2, 3 and 9 in the time division network NW connected to the switching trunk PST' are the same. Lower Highway DHW and Upper Highway UHW
It is not limited to those belonging to F!K, and distributed distribution to multiple highways is also considered, but in such a case, the effects of the present invention will not change. The effect of the present invention is not limited to 8 bits, and the effects of the present invention do not change even when it is composed of any other number of bits.Furthermore, the number and type of communication paths connected to the switching trunk PST' are is not limited to what is shown in the drawings, and many other modifications may be considered, but the effects of the present invention will not change in any case.

As described above, according to the present invention, in an electronic exchange having a time division network, it is possible to make a direct interrupt connection to a connection via a switching board trunk, and there is no need for interrupt connection equipment such as a mixed trunk. A plurality of sets of independent two-party call paths are configured within the switchboard trunk, eliminating the need for independent call equipment such as connection trunks. Furthermore, since multiparty calls via the switching trunk are realized by adding analog signals, the switching trunk can be made smaller and more economical.

[Brief explanation of drawings]

Figure 1 is a diagram showing an example of a conventional switchboard trunk system.
2 is a diagram showing a switching board trunk system according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of the configuration of the switching board trunk shown in FIG. 2, and FIG. 4 is a diagram showing a configuration example of the switching board trunk system shown in FIG. The fifth factor is a diagram illustrating control signals for each gate of the circuit, and the fifth factor is a diagram illustrating control signals for the gates of the two-channel switching circuit shown in FIG. In the figure, NW is a time division network, 11 to 9 are communication paths, ICT is an incoming trunk, 0GTFi outgoing trunk,
CNTt;j: connection trunk, PAT and PST' are switching trunks, TWT is a mixed trunk, OBD is a switching board, KBD is a supervisory board, MX is a mixed circuit, EX is a two-way switching circuit, G to G1゜is a gate, DA is a digital-to-analog converter, AD is an analog-to-digital converter, A
AD is an analog adder, A・A/◆ to m, AD* is an adder, B・R is a para 2 array first 1. SR is Shi7 Tregis Ku, DHW is Lower Shihighway, UHW is Upper Shihighway% al s bl・01, dl, al, bl, cl
and d is the digital signal for each channel, at s bt
, cl and d! is an analog signal for each channel, &a,
ba%C1 and dl are mixed analog signals, a4, b
4, Ca and d4 are mixed digital signals, g. to g@ are control signals, ctk is a clock signal, F is a frame, and t to t8 are time points. Figure 1 Child Figure 2

Claims (1)

[Claims] In an electronic exchange having a time-division network, there is a gate that extracts a digital signal for each communication path from a plurality of communication paths in the time-division network, and a general gate that converts the plurality of digital signals for each communication path into analog signals for each communication path. a digital-to-analog converter for converting; and an analog-to-analog adder for generating a plurality of sets of mixed analog signals obtained by removing signals for one communication path from each of the plurality of analog-to-analog signals output by the digital-to-analog converter and adding them together. , an analog-to-digital converter that converts a plurality of mixed analog-to-digital signals output from the analog adder into mixed digital signals, and a plurality of mixed digital signals output from the analog-to-digital converter to each mixer of the time division network. a mixing circuit consisting of a gate that sends out to a communication path not included in the digital signal; and a shift register that extracts digital signals of two communication paths from the plurality of communication paths of the time division network and accumulates them for each call. and a gate for exchanging and transmitting the digital signals of the two communication paths output from the shift register to the two communication paths of the time division network.
Switchboard trunk system with 111.