JP2001119423A - Telephony system and exchange used for the system, and computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a transmission cost of FAX information, to select a surer transmission path and to make a FAX reception job efficient. SOLUTION: A facsimile machine 11 and a FAX reception transmission computer 12 are connected to an extension interface of a private branch exchange 10, and after the FAX reception transmission computer 12 receives transmission of the facsimile machine 11, the FAX reception transmission computer 12 receives an opposite number via a LAN interface 103 of the private branch exchange 10. The FAX reception transmission computer 12 obtains an electronic mail address of the connection opposite party from the received opposite number and transmits FAX information by an electronic mail. In the case of receiving a FAX, the destination is switched to the FAX reception transmission computer 12, a dial-in number is sent to the FAX reception transmission computer 12 via the LAN interface 103 and the FAX reception transmission computer 12 obtains a FAX recipient from the dial-in number and transfer the received FAX information to a client personal computer 14 by an electronic mail.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephony system in which a private branch exchange apparatus and a computer are linked to transmit and receive a fax via a computer, and an exchange apparatus and a computer used in the system.

[0002]

2. Description of the Related Art Conventionally, a method of selecting a transmission path when transmitting FAX information under a private branch exchange apparatus is generally a method of selecting an optimum transmission path in the private branch exchange apparatus. In this case, the information used for selecting the transmission route is only the other party number, and the selected route is limited to the general office line and the dedicated line.

[0003] Further, regarding reception of FAX information, a common FAX terminal is connected to a private branch exchange, and the received FAX information is received.
In general, a method was adopted in which the person in charge was decided and the delivery was made manually.

[0004]

However, in the conventional transmission route selection at the time of facsimile transmission as described above, the Internet can be used only by using a general office line and a dedicated line via a private branch exchange. If the amount of information transmitted as a fax is large, the call time is prolonged and the telephone charge is increased, so that the cost of receiving and transmitting the fax information is increased, and the fax receiving operation is complicated. .

The present invention solves the above-mentioned conventional problems. By linking a private branch exchange device with a FAX receiving / transmitting computer and transmitting / receiving FAX information via the computer, the cost of transmitting FAX information is greatly reduced. To enable more reliable transmission path selection and more efficient FAX reception work, and when the FAX information cannot be transmitted and received via a computer, the FAX information must be transmitted and received in accordance with the amount of received and transmitted information. It is an object of the present invention to provide a telephony system in which an optimal line is selected from a plurality of communication lines connected in parallel to enable facsimile transmission and reception, a switching device and a computer used in this system.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a telephony system, an exchange device and a computer used in the system, wherein a private branch exchange device constituting the telephony system is linked to a facsimile transmission / reception computer. After receiving a call from a FAX device under the control of the private branch exchange by the FAX receiving / sending / receiving computer, the optimal transmission path is set via the Internet from the destination number notified to the FAX receiving / sending / receiving computer from the private branch exchange. Select the email of
Send FAX information by e-mail. When e-mail cannot be used, an optimal transmission path is selected and transmitted by fax based on the other party number and the amount of FAX information stored in the FAX receiving / transmitting computer.

When a fax is received, the fax information is
The AX receiving / transmitting computer intercepts the fax information, and determines the FAX recipient based on the dial-in information for determining the recipient notified from the private branch exchange. Enable forwarding to recipient email.

Therefore, according to the present invention, it becomes possible to transmit FAX information by e-mail via the Internet, and to select an optimal transmission path using the other party number and the amount of information, thereby greatly reducing the transmission cost of FAX information. Can be reduced.

[0009] By making it possible to transfer the fax information received by the fax receiving / sending computer on behalf of the fax recipient determined based on the dial-in information by e-mail, the efficiency of the fax receiving operation can be improved. .

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a private branch exchange for exchanging voice and data, and a facsimile apparatus for transmitting and receiving character data and the like connected to an extension interface of the private branch exchange. And a FAX receiving / transmitting computer having a built-in FAX modem,
A telephony system including an Internet such as a LAN connected to an AN interface, wherein the private branch exchange receives a call from the FAX device by the FAX receiving / sending / receiving computer via the extension interface, and receives a call from the FAX device. The FAX receiving / sending / transmitting computer is configured to notify the FAX receiving / sending / sending computer via the LAN interface, and the FAX receiving / sending / sending computer converts the notified called number into an e-mail address to determine an optimal calling path. Select the FA
The FAX information from the X device is transmitted to the other party as an e-mail via the Internet, and has an effect that the transmission cost of the FAX information can be significantly reduced.

According to a second aspect of the present invention, the facsimile transmission / reception computer includes a transmission path selection table for changing the transmission path in accordance with the amount of information stored in the facsimile reception / transmission computer. The FAX receiving / transmitting computer determines the optimal transmission path by referring to the transmission path selection table based on the other party number and the information amount. It has the effect that it becomes possible.

According to a third aspect of the present invention, there is provided a private branch exchange for exchanging voice and data, and a FA for transmitting and receiving character data and the like connected to an extension interface of the private branch exchange.
A telephony system comprising: a FAX receiving / transmitting computer having a built-in X device and a FAX modem; and an Internet such as a LAN connected to a LAN interface of the private branch exchange. Upon reception, the communication path is switched to the FAX receiving / transmitting computer via the extension interface, and the received dial-in number or caller number is transmitted to the FAX receiving / transmitting computer via the LAN interface. The FAX receiving and transmitting computer determines a FAX recipient based on the received dial-in number and caller number, etc., and receives FAX information from the station line on behalf of the FAX receiving and transmitting computer, and transmits the FAX information to the recipient. Forward as e-mail over the Internet And those composed, F received
There is no need to perform the task of delivering the AX to the person in charge, which has the effect of increasing the efficiency of the FAX reception task.

According to a fourth aspect of the present invention, the FAX receiving / sending computer has a FAX transfer destination definition table for changing a dial-in number to a FAX transfer destination mail address, and dials by referring to the FAX transfer destination definition table. Specify the email address of the forwarding destination corresponding to the in-number,
Fax recipient of the specified e-mail address
It is characterized by transferring information, and has an effect that FAX information can be intercepted by e-mail even when going out.

According to a fifth aspect of the present invention, there is provided a private branch exchange for exchanging voice and data, and a FA for transmitting and receiving character data and the like connected to an extension interface of the private branch exchange.
An exchange device for use in a telephony system including an X device and a FAX receiving / transmitting computer having a built-in FAX modem, and an Internet such as a LAN connected to a LAN interface of the private branch exchange device, wherein the private branch exchange device comprises: The facsimile apparatus receives the transmission of the facsimile apparatus via the extension interface by the facsimile reception / transmission computer, and notifies the other party number from the facsimile apparatus to the facsimile reception / transmission computer via the LAN interface; The receiving and transmitting computer converts the notified party number into an e-mail address, selects an optimal calling path, and
The FAX information from the X device is transmitted to the other party as an e-mail via the Internet, and an exchange device used for a telephony system capable of selecting a more accurate transmission route can be provided. Having.

A private branch exchange for exchanging voice and data, and a transmission / reception FA for character data and the like connected to an extension interface of the private branch exchange are provided.
An exchange device for use in a telephony system including an X device and a FAX receiving / transmitting computer having a built-in FAX modem, and an Internet such as a LAN connected to a LAN interface of the private branch exchange device, wherein the private branch exchange device comprises: When a fax is received from a central office line, the communication path is switched to the fax receiving and transmitting computer via the extension interface, and the received dial-in number, caller number, etc. are transmitted to the fax receiving and transmitting computer via the LAN interface. The facsimile receiving and transmitting computer is configured to determine a facsimile recipient from the received dial-in number or caller number, and to receive the facsimile information from the central office line by the facsimile receiving and transmitting computer. Email to the recipient via the internet And is intended monkey configured to transfer, such an action can be provided a replacement device to be used for efficient possible telephony system of the FAX reception operations.

A private branch exchange for exchanging voice and data, and an FA for transmitting and receiving character data and the like connected to an extension interface of the private branch exchange are provided.
A computer for use in a telephony system including a FAX receiving / transmitting computer having a built-in X device and a FAX modem, and an Internet such as a LAN connected to a LAN interface of the private branch exchange, wherein the private branch exchange comprises: The fax receiving / transmitting computer receives the transmission of the facsimile device via the extension interface, and notifies the facsimile receiving / transmitting computer of the facsimile number from the facsimile device via the LAN interface. The sending computer is configured to convert the notified party number into an e-mail address, select an optimal calling path, and send the facsimile information from the facsimile apparatus to the other party as e-mail via the Internet. And more An effect that can provide a computer used for precise capable telephony system selection of outgoing routes.

[0017] The invention described in claim 8 is a private branch exchange for exchanging voice and data, and a FA for transmitting and receiving character data and the like connected to an extension interface of the private branch exchange.
A computer for use in a telephony system including a FAX receiving / transmitting computer having a built-in X device and a FAX modem, and an Internet such as a LAN connected to a LAN interface of the private branch exchange. When receiving a fax from a line, the communication path is switched to the fax receiving / transmitting computer via the extension interface, and the received dial-in number or caller number is transmitted to the fax receiving / transmitting computer via the LAN interface. The FAX receiving and transmitting computer is configured to determine a FAX recipient from the received dial-in number or caller number, etc., and to receive the FAX information from the station line on behalf of the FAX receiving and transmitting computer, Email to the recipient via the Internet It is intended to be configured to forward as Le, an effect that can provide a computer used to streamline capable telephony system FAX reception operations.

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG.

(Embodiment 1) FIG. 1 is a configuration diagram of a telephony system according to Embodiment 1 of the present invention.

In FIG. 1, a private branch exchange device that exchanges voice and digital data is provided by a telephony system in which a private branch exchange device and a computer are linked to transmit and receive a fax via a computer.
A FAX device 11 for transmitting and receiving character data, a FAX receiving / transmitting computer 12 with a built-in FAX modem, a LAN 13 forming an information communication network within the area, a client computer 14 for processing user's requirements, an extension telephone 15, etc. I have.

The private branch exchange 10 is an extension interface 1 for connecting to a facsimile apparatus 11 and a computer 12.
01, a station line interface 102 for connecting to a general office line or a dedicated line 16, and a LAN for connecting to the LAN 13.
An interface 103, an extension interface 104 for connecting to the extension telephone 15, and a control unit 105 for controlling each of these interfaces are provided. Further, the computer 12 is connected to the LAN 13,
Is connected to a client computer 14.

Next, the operation of the telephony system configured as described above will be described.

First, when the facsimile apparatus 11 connected to the line interface 102 makes a call and the transmission destination number is dialed, the private branch exchange 10 receives a call to the facsimile receiving / transmitting computer 12 via the line interface 102. At the same time, the destination number dialed by the facsimile apparatus 11 is transmitted to the central office interface 102, the control unit 105, and the LAN.
The facsimile transmission / reception computer 12 is notified via the interface 103.

The FAX receiving / transmitting computer 12 finds an optimum transmission route from the received destination number, and transfers the FAX information to the destination terminal via this route.

Here, if e-mail can be used,
The received destination number is converted into an e-mail address using the correlation table or the like shown in FIG. 3 in the facsimile receiving / sending computer 12, an e-mail address is selected as an optimal sending path, and the e-mail is sent via the LAN 13. FAX by
Send information to the partner terminal.

Also, in the telephony system having the configuration shown in FIG. 1, when the transmission route is selected, the other party number received via the LAN interface 103 of the private branch exchange 10 and the FAX stored in the FAX reception / transmission computer 12 are stored.
An optimal transmission route is determined based on the amount of information (talk time). The reason why the amount of FAX information is used as a parameter for determining an optimal transmission route is that, for example, a network line with a local call of 3 minutes and 10 yen and a network line with a local call of 6 seconds and 1 yen are used. If there is, for example, 3
For a one-minute call, the communication cost can be reduced by selecting the former network line. For a one-minute call, for example, the latter network line can be selected to reduce the communication cost. . That is, if the information amount is large, the former network line is used, and if the information amount is small, the communication cost can be reduced by using the latter network line. Focusing on this point,
In the present embodiment, such an amount of FAX information is also used as a parameter for determining an optimal transmission route.

That is, the facsimile receiving / transmitting computer 1
In the second case, the FA number depends on whether the number of fax information stored in the fax number receiving / transmitting computer 12 is small or large.
With reference to the transmission path selection table 20 shown in FIG. 4 provided in the X reception / transmission computer 12, an optimum transmission path, for example, "001-045-" or "0070-045"
~ ", And faxing is performed by the determined transmission route.
Redistribute information.

The above-described series of operations can be represented by one flow chart as follows. FIG. 2 is a flowchart showing the processing operation of the telephony system shown in the first embodiment.

When FAX information is received from the FAX device 11 in the telephony system shown in FIG.
The X information amount is counted (step S12).

Further, based on the FAX information,
The electronic mail address of the destination corresponding to the destination number of the AX information is selected from the correlation table shown in FIG. 3 (step S1).
3) It is determined whether or not the e-mail address of the other party corresponding to the other party number has been selected in the correlation table (step S14).

If the destination e-mail address can be selected, the facsimile apparatus 11 and the facsimile transmission / reception computer 12 are connected (step S15). By F
AX information is transmitted (step S16).

It is determined whether or not the FAX information by the e-mail has been transmitted to the partner terminal (step S17). If the facsimile information has been successfully transmitted to the partner terminal, this processing operation ends.

If the fax information has not been transmitted to the partner terminal in step S17, the transmission route selection table 20 shown in FIG. (Step S18), and switches from the FAX receiving / transmitting computer 12 to the FAX device 11 (step S1).
9) FAX information is transmitted as a facsimile from the facsimile apparatus 11 through the selected network line (step S20), and this processing operation is terminated.

If the e-mail address of the other party corresponding to the other party number could not be selected in step S14, the process proceeds to step S20.

According to the present embodiment as described above, the FA
After the FAX information is received by the X receiving / transmitting computer 12, the LAN 13 (Internet) is selected as the optimum transmission path from the communication partner number for transfer, and this LAN
Since fax information can be sent to a communication partner by e-mail via proxy, the cost of fax transmission can be greatly reduced. In addition, when selecting the optimal transmission route, the FA
By using the information in the address book registered in the X receiving / sending / transmitting computer 12, there is an effect that it is not necessary to construct a new database.

According to the present embodiment as described above, the FA
After the FAX information is once stored in the X reception / transmission computer 12, the transmission path can be selected in consideration of the amount of the FAX information for retransmission, so that the optimum transmission path corresponding to the FAX number can be selected. The user can easily make settings and can perform more advanced transmission route selection.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIGS.

FIG. 5 shows the telephony system of the present invention.
FIG. 2 is a configuration diagram illustrating a case where FAX information at the time of FAX reception is automatically transferred to a recipient via a computer, and includes the same components as those illustrated in FIG. 1. FIG. 6 shows a configuration diagram of the FAX transfer destination definition table according to the second embodiment of the present invention.

In FIG. 5, when the control unit 105 of the private branch exchange 10 recognizes the facsimile reception at the time of facsimile reception, the communication path is switched to the facsimile transmission / reception computer 12 via the extension interface 101 and received by the office line interface 102. The information such as the dial-in number and the caller number is transmitted to the facsimile transmission / reception computer 12 via the LAN interface 103. The FAX receiving / transmitting computer 12 determines a FAX recipient based on the received dial-in number, caller number, and the like, and transmits the FAX information transmitted through the general office line or the dedicated line 16 to the client personal computer 14 as the recipient. It is transmitted as an e-mail via the LAN 13.

According to the present embodiment, FAX
FAX information is intercepted by the sending / receiving computer 12, and the dial-in number, caller number, etc.
By notifying the X receiving / transmitting computer 12, the FA
Since the X recipient is specified and the FAX information is transmitted as an e-mail to the specific recipient, the received FAX
Work such as delivery to the person in charge
The efficiency of the X reception work can be improved.

Further, in the telephony system having the configuration shown in FIG.
3. The e-mail address of the transfer destination corresponding to the dial-in number received via
2 is specified with reference to the FAX transfer destination definition table 40 shown in FIG. This allows the FAX recipient to arbitrarily change the destination of the FAX received by the FAX receiving and transmitting computer 12. Along with this, F
FAX information can be alternately received by e-mail for the AX recipient.

In the present invention, a switching device and a computer having the functions of the telephony system having the configuration shown in FIGS. 1 and 5 can be realized.

[0043]

As described above, according to the telephony system of the present invention, the exchange apparatus and the computer used in this system, the private branch exchange apparatus and the FAX receiving / transmitting computer are linked to transmit / receive the FAX information. FAX transmission via the Internet becomes possible by performing the transmission via the computer for use, and the transmission cost of FAX information can be greatly reduced.

Further, according to the present invention, a more reliable transmission path is selected by using the information amount stored in the FAX receiving / transmitting computer in addition to the other party number in selecting the transmission path at the time of FAX transmission. be able to.

Further, according to the present invention, when receiving a facsimile,
Since the AX receiving / sending computer can automatically transfer the FAX information to the recipient, the efficiency of the FAX receiving operation can be improved.

Also, according to the present invention, F
Since the AX transfer destination can be arbitrarily changed, the user can receive his / her own fax addressed to the company even when away from home.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a telephony system according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a processing operation of the telephony system according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a facsimile number-destination electronic mail address correlation table according to the first embodiment of the present invention.

FIG. 4 is a configuration diagram of a transmission route selection table according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram showing a case where the telephony system of the present invention automatically transmits FAX information at the time of FAX reception to a recipient via a computer.

FIG. 6 is a configuration diagram of a facsimile destination definition table according to the second embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Private branch exchange 101 Extension line interface 102 Line interface 103 LAN interface 104 Extension interface 11 FAX device 12 FAX reception / transmission computer 13 LAN (Internet) 14 Client personal computer 15 Extension telephone 16 Local line 20 Transmission path selection table 40 FAX destination Definition table

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04M 11/00 303 H04Q 3/58 106 5K049 H04N 1/00 107 H04L 11/20 101B 5K051 1/32 11 / 00 310Z 5K101 H04Q 3/58 106 F term (reference) 5B089 GA15 GA19 GA26 GA34 GA35 HA10 JA05 JA31 KA16 KB04 KB06 KC15 KC23 KE02 KE03 KG05 KG08 KH03 LA06 LA08 5C062 AA13 AA35 AB38 AB40 AC38 AC39 AC07AC14AE CD25 FF09 5K030 GA20 HA05 HB04 HC01 HC14 HD09 JA09 JA13 KA01 KA05 KA06 LB05 LB16 LD11 5K033 AA04 BA13 CB02 CB06 CB09 DA06 DB09 DB12 DB14 EC04 5K049 AA04 BB01 BB04 BB19 CC11 FF01 FF01 FF02 FF01 FF02 FF01 FF02 FF01 FF02 A HH12 HH18 JJ04 5K101 KK01 KK02 KK18 LL00 LL01 LL05 MM02 PP03 Q Q07 QQ11 RR05 RR19 RR21 TT06

Claims (8)

[Claims] A private branch exchange for exchanging voice and data, a facsimile transmission / reception computer including a facsimile apparatus for transmitting / receiving character data and the like and a facsimile modem connected to an extension interface of the private branch exchange; A telephony system comprising a LAN interface of a private branch exchange and an Internet such as a LAN connected to the private branch exchange, wherein the private branch exchange receives a call from the facsimile device by the facsimile reception / transmission computer via the extension interface. The facsimile machine is configured to notify the facsimile receiving / sending / receiving computer of the facsimile number from the facsimile apparatus via the LAN interface. Select the appropriate transmission route and select the fax device Telephony system characterized by being configured to send to the other side FAX information et as e-mail over the Internet. 2. The FAX receiving / sending computer transmits the F
A transmission path selection table for changing a transmission path according to the amount of information stored in the AX receiving / transmitting computer; the FAX receiving / transmitting computer based on the other party number and the information amount; 2. The method according to claim 1, wherein an optimum transmission route is determined by referring to a selection table.
The described telephony system. 3. A private branch exchange for exchanging voice and data, a facsimile transmitting / receiving computer incorporating a facsimile apparatus for transmitting / receiving character data and the like and a facsimile modem connected to an extension interface of the private branch exchange, A telephony system including the Internet such as a LAN connected to a LAN interface of a private branch exchange device, wherein the private branch exchange device transmits / receives a fax through a telephone line via the extension interface when receiving a fax from an office line. And transmitting the received dial-in number and / or caller number to the FAX receiving / sending / receiving computer via the LAN interface. Etc. and determine the fax recipient Telephony system characterized by being configured to intercepts the FAX transceiving computer a FAX information from a line forwarding as e-mail over the Internet to the recipient. 4. The FAX receiving / sending computer changes the dial-in number to a FAX transfer destination mail address.
An AX transfer destination definition table is provided, the transfer destination mail address corresponding to the dial-in number is designated by referring to the FAX transfer destination definition table, and the FAX information is transferred to the FAX recipient of the specified mail address. The telephony system according to claim 3, wherein: 5. A private branch exchange for exchanging voice and data, a facsimile transmission / reception computer including a facsimile apparatus for transmitting and receiving character data and the like connected to an extension interface of the private branch exchange and a facsimile modem, An exchange device for use in a telephony system including a LAN interface of a private branch exchange device and an Internet such as a LAN connected to the private branch exchange device, wherein the private branch exchange device transmits the fax from the fax device via the extension interface for receiving and transmitting the fax. The facsimile receiving / transmitting computer receives the facsimile number from the facsimile apparatus via the LAN interface and notifies the facsimile receiving / transmitting computer of the facsimile number. And select the best outgoing route , Replacement device for use in telephony system configured to send to the other side FAX information from the FAX device as an e-mail via the Internet. 6. A private branch exchange for exchanging voice and data, a facsimile transmission / reception computer incorporating a facsimile apparatus for transmitting and receiving character data and the like and a facsimile modem connected to an extension interface of the private branch exchange, An exchange device used for a telephony system including a LAN interface of a private branch exchange device and an Internet such as a LAN connected to the private branch exchange device, wherein the private branch exchange device switches a communication path through the extension interface when a fax is received from an office line. The computer is configured to switch to the FAX receiving and transmitting computer and to transmit the received dial-in number and caller number to the FAX receiving and transmitting computer via the LAN interface. FAX reception from in-number or caller ID It determines and replacement apparatus for use in telephony system configured to transfer FAX information from the office line as an e-mail via the Internet FAX transceiving computer to intercept to the recipient. 7. A private branch exchange for exchanging voice and data, a facsimile transmission / reception computer including a facsimile apparatus for transmitting / receiving character data and the like and a facsimile modem connected to an extension interface of the private branch exchange, A computer for use in a telephony system having a LAN interface of a private branch exchange and an internet such as a LAN connected to the private branch exchange, wherein the private branch exchange transmits the fax by the fax interface via the extension interface. , And notifies the facsimile receiving / sending / transmitting computer of the facsimile number via the LAN interface, and the facsimile receiving / sending / receiving computer sends the notified facsimile number to an e-mail address. Convert the best outgoing route Computer-option, and is used for telephony system configured to send to the other side FAX information from the FAX device as an e-mail via the Internet. 8. A private branch exchange for exchanging voice and data, a facsimile transmission / reception facsimile apparatus having a built-in facsimile apparatus for transmitting / receiving character data and the like and a facsimile modem connected to an extension interface of the private branch exchange apparatus; A computer for use in a telephony system including a LAN interface of a private branch exchange and an Internet such as a LAN connected to the private branch exchange, wherein the private branch exchange changes a communication path via the extension interface when receiving a fax from a central office. The computer is configured to switch to the FAX receiving and transmitting computer and to transmit the received dial-in number and caller number to the FAX receiving and transmitting computer via the LAN interface. FAX from numbers and caller ID Determine the followers, and used for telephony system configured to forward the e-mail via the Internet to the recipient FAX information intercepts the FAX transceiving computer from the station line computer.