JPH0332259B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer service system for a telephone switching network.

Requests for companies that have many branches in various locations to implement nighttime telephone reservation services, or to centralize some operations such as telephone reservations and telephone guidance among branch operations that are dispersed in distant cities at the head office. A forwarding service system is being considered in which a call from a customer to a branch is forwarded to the head office, and the company pays the call charges for the transfer section from the branch to the head office on behalf of the customer.

FIG. 1 is a diagram illustrating a telephone switching network having a conventional transfer service system. In the figure, 1 is the customer, that is, the general subscriber (SUB), 2 is the telephone office where SUB1 is accommodated, 3 is the branch office (TE) of the company implementing the forwarding service system, and 4 is TE3 is accommodated. Telephone offices, 5 and 6 are long distance telephone offices, 7
is the telephone center (TSC) of the company's head office, 8 is TSC7
9 is a dedicated telephone line (hereinafter simply referred to as a dedicated line) installed by a company under contract with a telephone company; 10 and 11 are areas with the same call charges (Zone A and Zone B), respectively.

The above system will be explained using a night telephone reservation service as an example. When SUB 1 calls nearby TE 3 to apply for a telephone reservation at night, TE 3 has already requested night transfer from telephone station 4.
SUB1 calls are telephone office 2 - telephone office 4 - leased line 9 -
Connected to TSC 7 at the head office via telephone office 8,
SUB1 can reserve a phone call at the cost of a call to TE3.

However, in order to configure the transfer service system as described above, it is necessary to
A switchboard with a forwarding function is required within the office, and the call charges for the forwarding section from the branch to the head office are SUB.
In order for the company to bear the burden instead of 1, it was necessary to conclude a contract in advance between the company and the telephone company to use the leased line 9. Therefore, it is impossible to provide the above-mentioned transfer service at a branch in a local city where the telephone exchange in the telephone office does not have a transfer function, and the fee for using the leased line 9 is divided between the branch and the head office, regardless of its usage (traffic). It is uneconomical if the traffic is low because it depends on the distance from the dedicated line 9.
Since the amount increases in proportion to the number of branches, there were drawbacks such as the usage fees becoming quite expensive as the number of branches increased.

In view of the above-mentioned drawbacks of the conventional transfer service system, the present invention provides a system that allows transfers to be made using public lines without making any modifications to telephone offices that have step-by-step or crossbar exchanges that do not have transfer functions. The gist of this is that it has two connection terminals accommodated on the general subscriber side of the call path, and also has a function of generating a telephone number for the forwarding destination and a function of charging the call fee to the forwarding destination. Install a forwarding service trunk at the central office,
When a call by a subscriber is detected through one connection terminal of the transfer service trunk, the call is made again by the telephone number generation function through the other connection terminal, and a connection is made with the transfer destination side using a public line. The transfer service system is characterized by the following. The drawings will be described in detail below.

FIG. 2 is a block diagram of a telephone office showing an embodiment of the transfer service system of the present invention. In the figure, 1 is
SUB, 4 is the telephone office, 12 is the crossbar exchange, 1
3 is an originating register (ORT), 14 is an in-office trunk (IOT), 15 is a forwarding service trunk (TRT) that has a function of generating a forwarding destination telephone number and a call charge function to the forwarding destination, and 16 is a telephone office 4. Outgoing trunk (OGT) that connects the public line from to toll relay telephone station 5, 17 is the input terminal (TA) on the IOT14 side of TRT15, 18 is the output terminal (TB) on the OGT16 side of TRT15, 121, 122, 123, 124, 12
Reference numeral 5 denotes a call connection train (hereinafter simply referred to as a train) of the crossbar exchange 12. Incidentally, for the sake of simplicity of the drawing, the telephone office 2 in FIG. 1 is omitted.

FIG. 3 is a diagram showing the detailed configuration of the TRT 15. In the figure, 19 is a monitoring circuit (SUPA) that monitors the call status of SUB1, 20 is a ringing signal detection circuit (RGD) that detects a calling signal sent from IOT 14, 201 is an R relay that operates with a calling signal,
21 is a monitoring circuit (SUPB) that monitors the response and termination of the TSC7 at the head office, 22 is a dial pulse sending unit (PS) that sends out the telephone number (dial pulse) of the forwarding destination (TSC7), and 23 is the telephone number of TSC7. A pulse generator (PG) 25 generates a dial pulse (P) and drives a dial pulse (P) relay 24 according to the number.
A detector (DTR) that detects the dial tone sent out from the ORT 13, 26 a DT relay that operates when the DTR 25 detects a dial tone, 27 a
PE relay that operates when all the dial pulses of TSC 7 have been sent, 28 is the terminal on the calling subscriber side (A0, B0, C0), 29 is the terminal on the called subscriber side (A1, B1, C1), 30 is the terminal on the called subscriber side (A1, B1, C1) It is a frequency meter (MT).
Terminal C0 is a control terminal for holding the trains 124 and 125, and although not particularly shown, a call rate pulse for charging the calling subscriber for local calls is also sent from here. Further, the terminal C1 is adapted to receive the communication frequency pulses from TE3 to TSC7 sent from the OGT 16.

Next, the operation will be explained using the night telephone reservation service as an example, as described above. When SUB1 calls TE3 to make a phone reservation at night, TE3's answering machine says, ``Today's business has ended. Nighttime reservations are being accepted at the counter at local number ○○-□□□□.'' An announcement message saying something like, ``I'm here.'' is now being sent back. SUB1 hangs up the phone, then again follows the announcement tone and says “○○-
When you dial "
Connect to 15. Next, when a call signal is sent from IOT14 to TRT15, this call signal is sent to RGD2.
0 is detected and the R relay 201 operates. This closes the make contact r of the R relay 201.
A loop is created by passing PS22 between the A1 and B1 terminals. Furthermore, the crossbar exchange 12 is a TB of TRT15.
18 and ORT 13 are connected via train 123, and the dial tone from SUB1 is sent from ORT 13. The dial tone is detected by DTR25,
The DT relay 26 operates, its make contact dt closes, and the PG 23 is activated. PG 23 generates a telephone number for transferring the call of SUB1 to TSC 7 on the public line route of telephone station 2-4-5-6-8 in FIG. 1, and drives P relay 24. According to the operation of the P relay 24, the break contact p in the PS22 turns on and off, and the A1 terminal - PS22
-The dial pulse of TSC7 is connected to the route of the B1 terminal.
Sent to ORT13. When ORT13 receives all dial pulses, crossbar exchange 12 disconnects train 123 and newly connects TB18-OGT.
16 trains 125 are connected and dial pulses are sent to the toll relay telephone office 5. Thereafter, the TB 18 is connected to the TSC 7 via the telephone office 5-6-8 by the normal operation of the crossbar exchange 12.

When TSC7 responds, the response signal is sent to the central office 8-
6-5, it is returned to the A1 and B1 terminals as a reverse signal, and the signal is sent to D relay 2 of SUPB21.
11 was detected, and R relay 201 was restored.
SUB1-Trane 122-IOT14-Trane 124-TRT15-Trane 125-OGT16
Enter the call using this route. The call frequency from TE3 to TSC7 is counted by stepping the MT30 using a call frequency pulse sent from the OGT 16 to the C1 terminal.
At this time, since the speech frequency pulse is not relayed to the C0 terminal, the frequency meter of SUB1 will not be incremented.
Also, MT30 is not necessarily TRT1 as shown in Figure 3.
It is not necessary to incorporate the frequency meter into the TRT 15, and the frequency meter provided at the subscriber side of the exchange (in the case of the present invention, the terminal of the crossbar exchange 12 in which the TRT 15 is accommodated) may be used as is.

Therefore, according to the embodiment, the transfer service trunk TRT 15 has the function of receiving a call from the SUB 1, generating the telephone number of the transfer destination TSC 7, and calling the TSC 7, just like a telephone that acts as a branch office. Therefore, a call received at the TRT 15 is dialed from the TRT 15 and transferred to the TSC 7. In addition, since dial calls are made, calls between telephone stations 4 and 8 are made over public lines, and in cases of low traffic, such as telephone reservations for branch offices in local cities or night transfers, the usage fee is lower than that of a dedicated line. The cost is lower than when using the conventional method, and the effect is more pronounced when the number of branches is large, that is, the number of dedicated lines in the conventional method. Also
By installing TRT15, charges determined by the telephone number dialed by SUB1, that is, SUB1
Charges can be registered separately between the charge between TRT 15 and TE3, and the charge determined by the telephone number that the TRT 15 called, that is, the charge between TE3 and TSC7.

FIG. 4 is a block diagram of a telephone office showing another embodiment of the present invention, in which when the exchange is of a common control system such as a crossbar type, the SUB1 and TRT15 of the embodiment described above are transmitted by the operation of the translator of the exchange. Like IOT
This allows direct connection without going through 14. In the figure, 31 is a transfer service trunk (TRT) used in this embodiment, which will be described later.
are subscriber terminals, and 126, 127, and 128 are trains of the crossbar exchange 12. FIG. 5 is a diagram showing the detailed configuration of the TRT 31 shown in FIG.
341 is a monitoring circuit (SUPB) that monitors the response and termination of TSC7 at the head office, and 341 is a call monitoring relay (D).
The other configurations are the same as those in the previous embodiment.

As in the previous embodiment, the operation will be explained using a night telephone reservation service as an example. When SUB1 dials the night reservation reception number "○○-□□□□", crossbar exchange 12 in telephone office 4 connects SUB1-TRT31 via train 126 and activates TRT31. A relay 331 operates and make contact a
is closed, TRT31 is connected to subscriber terminal 32.
In order to create a loop through the PS22 between the A1 and B1 terminals, the crossbar exchange 12 connects the subscriber terminal 32 to the train 127 to
Connect ORT13. ORT13 to SUB1
When the dial tone is sent to TRT31,
The dial tone is detected by DTR25, DT relay 26 is activated, and its make contact dt is closed.
Start PG23. Thereafter, by the same operation as in the above embodiment, the dial pulse of TSC 7 is sent to toll relay telephone station 5 via train 128, and TSC
The response signal from 7 is D relay 341 of SUPB34
Detected in SUB1-Trane 126-TRT31
-Subscriber terminal 32-Train 128-OGT16
Enter the call using this route. Therefore, according to this embodiment, the number of trains used within the crossbar exchange 12 can be reduced, and calls can be made without using IOT. Other functions and effects are the same as in the previous embodiment.

As explained above, according to the present invention, it is possible to configure a forwarding service system that performs forwarding and billing for calls to the forwarding destination simply by installing a forwarding service trunk in a telephone office equipped with an exchange that does not have a forwarding function. Moreover, it has the advantage that calls can be made via general public lines between the telephone office and the destination telephone office, so it is possible to provide the forwarding service even at branches in local cities, and it is possible to conduct calls at night. Customers,
It has the advantage of being able to provide a transfer service system that is useful to both companies.

[Brief explanation of drawings]

The drawings serve to explain the present invention; FIG. 1 is a diagram showing a telephone switching network having a conventional transfer service system, and FIG. 2 is a block diagram of a telephone office showing an embodiment of the transfer service system of the present invention. , FIG. 3 is a diagram showing the detailed configuration of the transfer service trunk in FIG. 2, FIG. 4 is a configuration diagram of a telephone office showing another embodiment of the present invention, and FIG. 5 is a diagram showing the configuration of the transfer service trunk in FIG. 4. FIG. 1...General subscriber, 4...Telephone office, 12...Crossbar exchange, 15...Transfer service trunk.

Claims (1)

[Scope of Claims] 1. A forwarding service that has two connection terminals accommodated on the general subscriber side of a call path, and also has a forwarding destination telephone number generation function and a call fee billing function to the forwarding destination. When a trunk is installed at a telephone office and a call by a subscriber is detected through one connection terminal of the forwarding service trunk, the telephone number generation function re-calls the call through the other connection terminal and the call is sent to the forwarding destination side. A transfer service system characterized in that a connection is made using a public line.