Method for automatic redialling in communication terminals

The invention relates to a method for redialing in communication terminals according to the preamble of claim 1.

From DE-A-2734139 a comfort telephone is known which also applied the feature Redial becomes. There are two redial memory provided for their control a distinguishing criterion necessary is. If one of the redial memory is occupied, by the distinguishing criterion of each free redial memory Provided as an optional repeater. For the user it is important to know what to Repeated phone number where the redial memory is stored. For the targeted selection of one of two stored numbers are in a twelve-part keyboard two keys provided for Redial.

With such an arrangement of Wahlwiederholspeichern with a fixed allocation to two symbol keys can only two redial memory are used. Although it is in claim 3 of the aforementioned published patent application noted that "the circuitry expandable to two flags is ", but then obtained with the two for redial keys provided a more complicated Operating procedure. It is also not in the individual specify how the other flags in the described comfort telephone is arranged.

From US-A-4930155, a telephone is known, in which a number can be controlled by allocated to the redial numbers.

The object of the invention is a method for imagine Redial on communication terminals, where a simple operation procedure and using only a single key, a larger number by made available for the redial numbers can be controlled to be called from targets. It should the type of operating procedure remain the same, how many redial memory spaces available to stand.

For the solution of this problem is a combination of features provided, as specified in Patent Claim first

This is achieved in an advantageous manner that a user multiple phone numbers for redial available are that he can call at any time. To operate only a single key is required, the each last number dialed is displayed first, unless another number is desired. When exceeding the planned storage capacity will each the furthest in the past number from the memory removed, ie overwritten, so that always the last selected Targets for redial available to stand.

Further developments of the invention result from the dependent claims. It is particularly advantageous if the to Redial number to be provided in each case in a display appears. The in each Rows of redial memory stationary phones can also be individually and precisely in a speed dial memory be adopted. Also, a number of a caller, the is in a call list, may in the redial memory are stored.

An embodiment of the invention will be described Example explained in more detail with reference to drawings.

It shows<dl tsize="5" compact="compact"><dt>Figure 1</dt><dd>a functional overview</dd><dt>Figure 2</dt><dd>a block diagram.</dd></dl>

The redial memory shown in Figure 1 WSP allows multiple storage locations (lines) with a Record number and operates according to the LIFO principle. A most recently been stored number is so output first. This is indicated by arrows, after which a last number entered in the top line of is to find memory. You enter a phone number automatically when a new election. If the limit of Memory capacity is reached, is the most lost past number.

Pressing the redial key WW, with a standardized symbol is marked, any space be specifically controlled. Press once is read the last number dialed. with each re-activation of the redial WW is a each previously dialed call number switched.

The start of the election emission WS begins when after releasing the redial WW elapsed a predetermined time is or the operation time was long enough. Details will be explained with reference to FIG. 2 The Operation procedure may also be designed so that the Redial WW only to select a number used and the start of the election emission WS by picking the handset HA or pressing another button T occurs.

In Figure 2 it is shown how when dialing a number about choosing input line WE choosing transmitter via a WS emitted number in a row, z. B. 1, the redial memory WSP is stored.

One of the lines 1 to n is in this case controlled such that each following number reaches the next line. If a new telephone number is sent out, and in the redial memory WSP no line is free, so is the furthest in the past number, eg. as in the the Line 1 standing, overwritten by the new number. At the next new number is then the following Line, in Example 2, overwritten. In this way, always chosen last n numbers in Wahlwiederholungsspelcher WSP detained. These are two address counters, a, for storing EAZ and one for reading LAZ provided. When you select a new phone number is the Store-address counter EAZ increased by 1, so that it always shows in this last is stored phone number.

When they were first pressing the standard with a Symbol designated redial button is the WW Read address counter LAZ connected to that line where also the store-address counter EAZ is pointing, so to where recently a new number is stored has been. Press again the redial button WW is the read address counter LAZ a counting backwards step, so that the penultimate number can be popped. Every renewed pressing Redial button WW causes the read address counter LAZ is switched to a line 1 to n, which is a each previously dialed number contains. The respective provided number is parallel in a Display means AE, if any, visible.

If after the initial activation of the redial key WW is a predetermined time elapses, thus saith delay means VZ, and choosing transmitter WS is driven. Here is the last number dialed read and transmitted. So there is no difference to the user over a terminal with a single redial memory.

The user of a communication terminal, by once or repeatedly pressing the redial button WW achieve that any in the redial memory WSP located phone number will be sent out can. It is always a control in an existing Display means AE possible. To the user to give sufficient time for a check up, the expiration time the delay means VZ to an acceptable Value can be set. Thus, no major differences against the operator in a single give redial memory, this elapsed time may the delay means VZ when pressed once the Redial button WW is set to a shorter time will.

The requirement for a redial operation procedure can also be modified so that after selection the section to be repeated call by first briefly Pressing the redial button for starting this WW choosing transmission is operated again for more. In that regard, a timer ZG provided that the after its expiry Dial transmitter WS starts.

Finally, it is also conceivable that the indexing of the Read address counter LAZ takes place only when the redial button WW after a short actuation, ie shorter than the expiration time of the timer ZG, is released. On longer pressing then causes the emission of the displayed Phone number, so that by again pressing the redial button WW is not then required.

A simplification of the operating procedure results when with the redial key WW only the selection of is made to repeat number. To start choosing sending the handset must then be removed, so that it operated Contact GU polling stations WS can start. Instead of a contact can also be a GU Lauthörtaste LH or a speed dial key KW are pressed. Here, the timer ZG can be omitted.

The present in the redial memory WSP phones can be described by a simple operation procedure in a speed dial memory KSP assume when a transfer button UT is provided. Pressing this button takeover UT is that number in the speed dial memory KSP taken which previously WW with the redial key had been selected. So it is that each number transferred into the speed dial memory KSP that for sending a phone number is provided, while simultaneously appears in the display. It must one of the speed dial keys K1 ... K0 actuated assign this number one place in the location.

If the communication terminal via a caller list ARL has, so the numbers of interim callers be retained and displayed, they can taken numbers in the redial memory WSP will. This can selectively by pressing a key 1 (for example, button AT) or automatically on first call a phone number carried from the caller list. Thereafter, a call back connection described during a redial as be constructed in a convenient manner, without requiring a new complete Selection is required. The numbers Come into existence incoming connections, which do not appear in the caller list, be in the redial memory WSP taken.

Course, the method is also applicable when is not a display device AE present, with which Users of course need to remember which numbers just located in the redial memory. It is natural expediently, the contents of the redial memory check WSP using a display device AE to. If it accidentally for destaging a visible in the display device AE number comes, the election broadcast may in time be interrupted before there is a link.