DE2523884A1 - Distributor for calls waiting at telephone exchange - prevents loss of high priority call when call registers are blocked with low priority calls - Google Patents

Abstract

The call distributor, for calls waiting at a telephone exchange, takes into account both the incoming call's waiting time and its priority and holds incoming calls in store. If all the storage space is full with waiting incoming calls, and a call of high priority arrives it is prevented from being lost due to lack of available storage space by simply clearing out a call having a low priority and storing the high priority call in its place. This thereby ensures that high priority calls are not lost when all the call registers are blocked by low priority calls.

Description

Procedure for the distribution of calls from to switchboards that become available a switching system waiting calls.

The invention relates to a method for call distribution of calls waiting for attendant positions in a switching system to become available taking into account both the different priorities of the waiting calls, as well as the waiting times by adding the waiting calls depending on the order of arrival with additional storage of the respective priority values be stored in memory locations of a call memory and from there when they become free a switchboard depending on a central control device for the purpose Connection to the attendant console.

There are already circuit arrangements for telephone systems with operator stations and queue memories in which the calls are in the order of arrival stored and then, when attendant places become free, in the for the Clearance can be saved again in accordance with the specified sequence. The value of the calling subscriber can also be evaluated, see above that high-quality calls are preferred in the order of arrival and low-value Calls in their own order of arrival with attendant positions becoming available can be connected. Depending on the time switch of the switching center If certain times are exceeded, a second access to occupied in preparation for the attendant console. The supervisor can also speed up the allocation of the next call. There can be signs of jostling be switched on.

When handling a waiting call, i.e. when connecting to a free switchboard is used in these known circuit arrangements causes a so-called "slipping down" of the other waiting calls.

This "sliding down" means that the others are waiting Move calls up one memory location in the order in which they appear.

The object of the present invention is, when busy of all memory locations of a call memory for waiting calls when there is one Call higher quality with simple means storage space for such calls to make accessible.

This is achieved by the fact that when all storage locations are occupied of the call memory and the presence of a call with high priority is the central Controls the determination of the data of a waiting call with lower priority in the call memory, the allocation of a timer for the control of the repeated Request for free call space for the named waiting call with lower priority, the activation of the relevant storage space and the Storage of the new incoming call with the higher priority in the one that has become available Call memory storage space is controlled.

In this way, with simple means and taking advantage of the existing central control device and the call memory the preference of a A call with a higher priority is also ensured if the call log is through Low-order calls are blocked.

Based on the description is an embodiment of the invention described.

In the description of the exemplary embodiment, it is assumed that that systems with the distribution of waiting calls to call sets that become free Switching places of a switching system in a wide variety of embodiments and using central controllers and call records and call memories are known. In this context, reference is made to DPS 1 088 111 and 2,057,206 and DOS 2,211,778 are referred to.

From the prior art mentioned it is known that incoming and outgoing trunk calls made in the course of transferring a call or in the course of the so-called reporting traffic must be fed to an operator via so-called Connection sets, of which there are several, can be connected to these locations are. Since in large private branch exchanges several calls to the It is also known to be able to wait for connection to an attendant console to mark waiting calls in memory locations in a call log. For each waiting call is provided a memory location with several bits in which not only the trunk transmission occupied for the waiting call is marked with its address but also the type of call, for example whether it is an incoming call Local call, an incoming remote call, a report call with forwarding - including all outgoing trunk calls - a report call without forwarding, an advisory call, a call dropped to the operator console - to the subscriber does not respond - or something like that is involved.

A quality label is provided for each of these call categories, each of which corresponds to a specific priority for handling the waiting call. For example, recalls are given priority 1 and remote calls are given priority 2, local calls and reporting calls with relaying priority 3, reporting calls without Forwarding the priority 4 and advisory calls the priority 5. However, the places can also be in two groups, namely one group be divided with official traffic and a group with reporting traffic, whereby then also divide the priorities accordingly.

To record the address of the occupied trunk transfer and the corresponding Priorities are the memory with both the call finder and the central one Control device connected, so that both the information required per transmission as well as the centrally stored and compiled information about the memory can be transferred. The attendant console is directly linked to the call records and the call records are connected to the trunk transmissions via a corresponding connection coupler switchable. But it can also connect the call records via an additional centralized connection set and another between the connection set and the trunk transmission located coupler to the trunk transmission.

If there is a waiting call for an operator seat to be available the priority of this call is always given by the central control device and this priority is determined if there is also a busy indicator for all memory locations of the call memory are available, use them for this purpose. priority with the existing priorities in the memory to determine the least significant Compare priority in call log. If the lowest priority is determined, so the call waiting for the shortest time in the call log becomes the lowest with this one Priority is determined and it is the relevant transfer of office over which this There is a timer associated with the lowest value call that the repeated request one free space it in the call memory in a certain given time rhythm.

At the same time, the release is also given by the central control device this memory space in such a way that in this memory space now the The address of the transfer of office is registered with the higher order. Additionally Of course, this address also has the priority of the higher-order one The call is recorded in the memory space that has been freed up.

In this way, the call with the higher priority is in the Free memory space of the call memory added and thus in the place of the originally waiting call has been classified with the lower value. The dispatch order now corresponds to this newly saved call its value and in the chronological order it receives the decisive Time of receipt of the low-order call.

It is further assumed that from the central control device when a call record of an attendant console becomes free, the Transfer to an office via the call record that has become free should and for whatever reason a route is busy for the connection occurs, a timer is also assigned to the transfer of office in this case, to repeat the reconnection after a certain time has elapsed to be able to.

This repetition causes the timer via the central control device. This timing element is usually different from the first mentioned, that of assigned transmission to the low-order call.

2 claims

Claims (2)

Claims $ 5 ,, Method for the distribution of calls from to becoming available Switchboards of a switching system taking waiting calls into account both the different priorities of the waiting calls and the waiting times, by placing the waiting calls depending on the order of arrival additional storage of the respective priority levels in memory locations of a call memory and from there when an operator position becomes free depending on a central control device for the purpose of connection to the attendant console be saved, that is, that when busy his of all memory locations of the call memory and the presence of a call with high Priority the central control is the determination of the data of a waiting call with lower priority in the call log the allocation of a timer for the Control of the repeated request for a free call space for the said Waiting call with lower priority, the activation of the relevant storage space it and the storage of the new incoming call with the higher priority is initiated in the free memory space of the call memory. 2. The method according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that the allocation of another, further timer for the transfer of office of an existing call, one that has already been assigned to a seat when the path is busy the connection setup is repeated while maintaining the allocation to enable.