JPS5813097A - Fixed circuit containing system - Google Patents

Abstract

PURPOSE:To economically service for a fixed circuit by transmitting the control signal of a prescribed channel among the voice separating type control signal channels of a multiplied channel as the voice signal of an assigned channel. CONSTITUTION:Terminal station utits DTU0-DTU3 which contain multiplied circuits of 24 channels (CH) and a control signal unit SGU which has the same number of CHs as the terminal station units have, are connected to a multiplied channel HW having a voice signal time slot (TS) of 120 CHs and a control signal TS of 8 CHs through a multiplying device MPX. The control signal of channels which receive fixed service among the channels contained in the DTU0-DTU3 is extracted to the SGU from the HW and again sent to the HW after it is put into the voice signal TS assigned to the SGU. A central control equipment CC fixedly connects the TS of the above mentioned channels which receive fixed service and the TS, into which a control signal which corresponds to the former TS is inputtd, to a subscriber's circuit for fixed circuit FLC through a time division channel TD-NW.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on a (2. O Concerning Fixed Line Accommodation System in Digital Terminal Equipment That Constitutes a Digital Multiplexed Communication Path Constructing a Digital Multiplexing Communication Path Having a Multiplexing Device and a Voice Separated Control Signal Path No. 19 2 is a diagram showing an example of connection with an exchange. In FIG. 1, the digital terminal equipment DT has five sets of digital terminal units DTUO to DTU4.

Each of the digital terminal units (DTUO to DTU4) is composed of a multiplexer MPX and a communication path CHt24 for transmitting a voice signal V and a control signal such as a switching signal St.

Each of the communication path groups CHGO to CHG4, which respectively accommodate CHGO to CHG4, is a time-division communication path group having a frame #il configuration as illustrated in FIG. In FIG. 2, each frame F (CHG) r, i, ' which is repeated at a period of 125 microseconds as is well known, has a synchronization bit Fb of 1 bit and 2 bits each consisting of 8 bits.
It consists of four time slots TS. Each time slot TS is assigned to 24 channels CH, and all 9 ordinarily 8 pits are used for transmitting the audio signal V. Incidentally, bit b7 of each time slot T8 is used for transmitting the control signal S of the corresponding channel CH every six frames. Note that since the control signal S requires a maximum of 2 bits, the control signal S is transmitted every 12 frames (1.5 milliseconds). Communication path groups CHGO to CHG4 as described above
is a digital terminal unit) DTUO to DTU4 t
- constitutes a digital multiplex channel HWt, which is led via the multiplexer [MPX and includes 120 channels CH]. The digital multiplex communication path HW has a frame structure as illustrated in FIG. "In Figure 3, 125
Each frame F(HW), which repeats in microseconds, consists of 128 time slots TS, each consisting of 8 bits.

Among them, time slots TS4 to T863 and time slots rTS68 to 127 each have 120 channels CH.
, and all 8 bits are used for transmitting the voice signal V (hereinafter, each time slot TS will be referred to as a voice signal path vca'j). Also, time slots TS64 and TS65 are allocated to ?1III for 120 communication paths cM. Control signal Sμ
l6 frames (2 ms) 1 as a period, 2 each
(hereafter time slot TS6)
4 and 65 are referred to as control signal paths SHW) 0 or more digital multiplexed communication paths HW are connected to the time division network TD-NW of the time division exchange, and are controlled by the central controller CC for each communication path CM. It is connected to the required subscriber SUB etc. Note that the central control unit cc connects the digital multiplex communication path HW to the drop/add circuit DI for the connection control.
Then extract the control signal path SHW.

A control signal S is sent and received. Also, when the subscriber SUB is switched on, the control signal S is sent and received between the subscriber circuit LC and the corresponding subscriber circuit LC, as is well known.

As is clear from the above explanation, a conventional digital terminal station number DT is connected to a time division exchange by a digital multiplex communication path MW having a frame structure as shown in FIG. 3, and a control signal w! The control signal S transmitted by the SHW is
It is necessarily transmitted to the subscriber circuit LC via the central control unit CC'fr. Therefore, it becomes impossible to apply a fixed-line service in which a specific communication channel CH' is fixedly connected to a specific subscriber SUB or the like and placed outside the control of the central controller CC.

As a countermeasure, each channel C is
19 voice signal paths VCH are allocated and divided into 9 times, and the network TD-NW is also connected to the desired subscriber circuit LC through two voice signal paths, and one voice signal path VC is connected to the desired subscriber circuit LC.
H transmits the voice signal V, and the other voice signal path VC
HKlfli, Jl'II signal S also ra subscriber circuit L
Measures have also been taken to transmit data between the digital terminal equipment D' and the digital terminal equipment D'. Responsible for the economic efficiency of T＼Naru0 book? What do you mean by the above-mentioned drawbacks of conventional digital terminal equipment? :Remove the above-mentioned one fixed line for economic efficiency.
The goal is to realize a means that can accommodate the problem without any problems.

'This purpose consists of a plurality of digital terminal units and a multiplexing device each accommodating a plurality of communication paths for transmitting voice signals and control signals, and is equipped with a voice-separated control signal path. In a digital terminal device configuring a digital multiplexed communication path, a control signal t of a predetermined communication path included in the audio separation format control signal path of the digital multiplexed communication path, a designation assigned to a unit on a particular digital terminal station. This is achieved by transmitting the audio signal as a voice signal on the communication path.

The following nine embodiments of the present invention are shown in Figures 4 and 5! I will explain it to you. FIG. 4 is a diagram showing a fixed line accommodation system according to an embodiment of the present invention, and FIG. 5 is a diagram showing an example of the configuration of the digital terminal equipment in FIG. 4. Note that the same reference numerals indicate the same objects throughout the figures. In FIG. 4, the digital terminal equipment DT' is provided with four sets of digital terminal units DTUO to DTU3, each of which is accommodated in a channel group CHGO to CHG3' consisting of 24 CHs. In place of the digital terminal unit DTU4, a control signal unit (SGU) is connected to the multiplexer f1MPXK. The control signal unit S G U n+
(l'7゜digital terminal station) DTUO to DT
Although it does not accommodate the channel group CHG like U3, it does not accommodate the communication path group CHG, but for the multiplexer MPX, the digital terminal unit DTU
Under the same connection conditions as O to DTU 3, it is possible to transmit and receive audio signals V and control signals S for 24 communication paths CH (hereinafter referred to as control signal communication path group 5C IG). Therefore, the multiplexer MPX assembles a digital multiplex channel HW having a capacity of 120 channels as shown in FIG. 3, including the control signal channel group 5CHG. The control signal path SHW of the digital multiplex communication path HW is connected to a control signal unit (SGU) as shown in detail in FIG.

FIG. 5 shows a digital multiplexing channel HWFi, a transmitting multiplexing channel HWS, and a receiving multiplexing channel HWR assembled by the multiplexer MPX.

Further, the control signal channel group 5CHG provided between the multiplexer MPX and the control signal unit (SGU) is shown for each transmission direction. The control signal path SHW included in the transmission multiplex communication path mws is connected from point B to the control signal unit)SG.
It is also guided to the memory in U, RAM2, and the write instruction signal W
2, it is possible to store the control signal S corresponding to an arbitrary communication path CH from among the control signals S for the i2o communication path CH.

Memory RAM2 is 24W! r! (8 bits per candy), and according to the read instruction signal R2 from the counting circuit CTR, the stored contents are stored at a rate of 91 words per channel CH under the same conditions as the digital terminal units DTUO to DTU3. The RAM 1 for each output signal which is sent to the multiplexer MPX also has a storage capacity of 24 words (11i8 bits), and is sent to the digital terminal units DTUO' to DTU3 by the write instruction signal W1 from the counting circuit CTR. Control signal channel group 5 transmitted from multiplexer filfMPX under the same conditions.
CHG signal t-1 communication path C) I is stored at the rate of one word. The stored contents are extracted at any time according to the successive instruction signal R1, and are added to the 120 speech channels CI transmitted by the voice separation type control signal path SHW included in the reception multiplexed speech path HWR via the insertion circuit I't-. Any call channel C) can be inserted as a control signal S corresponding to I in the control signal S of the write instruction signal W2 and the subsequent instruction signal R2. ! It is transmitted from @cc to the control signal unit SGU via the 10A signal path SHW in the reception multiplex communication path HWR and the multiplexer MPXt-, and is programmed by the fixed line assignment data stored in the memory RAM0 by the control circuit CTL. determined. Now, if all 96 channels CH included in the channel group CI (GO to CHG3) are used as fixed lines, KFi and any T1 fixed channel allocation data will not be different colors, so the transmitting multiplex channel HWS The control signal S corresponding to any communication path included in the control signal path SHW of is not stored in the memo 9RM (2), and the control signal S extracted from the memo IJRAMI is stored in the control signal path SHW in the reception multiplex communication path HWR. S is never inserted.Next, any channel Cu of the 96 channels CH included in channel groups CHGO to CHG3
When used as a t-fixed line FCH, at the start of use, from the central control unit CC of the time division switch to the control circuit CTL of the control signal unit SGU via the above-mentioned route,
Fixed line assignment data is communicated. The fixed line allocation data specifies the fixed line communication path FCH and any vacant communication path (hereinafter referred to as I signal communication path SCH) within the control signal communication path group 5CHG. Note the line allocation data! Stored in JRAM0, memo IJRAM2
A write instruction signal W2 for the memory RAMIK and a continuation instruction signal R1 for the memory RAMIK.

Sending multiplexed channel HWS and receiving multiplexed channel HWR
control signal St corresponding to the fixed line communication path FCH transmitted by the control signal path SHW in the control signal path S - the control signal communication path S
It is generated so as to be transmitted to CH.

As a result, the voice signal V of the fixed line channel FCH is transferred to the specific voice signal path VCH in the sending multiplex channel (IWS) and the receiving multiplex channel HWR, as well as to the fixed line channel FCH, as is known. The control signals S are transmitted to the respective time division exchanges by voice signal paths VCH specific to the control signal communication path SCH. On the other hand, in a time division switch, the central controller cc is connected to the digital terminal equipment fIILDT'
At the time of sending the fixed picture allocation data to the fixed line communication channel FCI (A
and a voice signal path V unique to each communication path SCH for control signals.
CHt, equipped with a subscriber circuit FLC that provides fixed line service via the time division network TD-NW.
Fixed connection to two audio signal path terminals.

Thereafter, the fixed connection will be excluded from the management target.As a result, the control signal S of the fixed line communication path FC)I will be changed to the control signal communication path S.
It is directly transmitted to the fixed line subscriber circuit FLC via the voice signal path VCH specific to the CH and the voice signal path in the time division network TD-NW fixedly connected thereto. Furthermore, when canceling the fixed line service in progress, the central control unit fNCC transmits the fixed line cancellation data to the control circuit CTL in the control signal unit SGU through the same route as the fixed line allocation data, and also transmits the fixed line cancellation data to the control circuit CTL in the control signal unit SGU. - Release the identified connection set in the NW.

Based on the received fixed line release data, the control circuit CTL deletes the fixed line assignment data stored in the memory RAM0 and stops sending out the write instruction signal W2 and read instruction signal R1. As a result, the m control signal S corresponding to the fixed line communication path FCH extracted from the control signal path SHW
transmission through the control signal channel SCH is stopped;
The fixed line call FCH is returned to the general call path C1 (state) and becomes available for use.

As is clear from the above description, according to the present embodiment, 24 out of 120 channels CH that can be accommodated by the digital terminal device DT' are only diverted to 8 channels CHt - control signal channel CH. Any communication path CM among the 96 communication paths CH can be used as a fixed line communication path FCH up to 24 communication paths.

It should be noted that Figures 4 and 5 are only one embodiment of the present invention, and may be used, for example, as a digital terminal device DT'.

Digital terminal unit) DTU and control signal unit)
There is no limit to the number of communication paths accommodated in the SGU,
Many other variations may be considered, but in any case the effect line of the present invention remains the same. Furthermore, the frame configurations of the communication path group CHG and the digital multiplex communication path HW are not limited to those shown in the first example and FIG. It doesn't change.
1 to 9 According to the present invention, fixed line services can be introduced without significantly reducing the communication path capacity of digital terminal equipment.

[Brief explanation of the drawing]

Fig. 1 is a diagram illustrating an example of a connection between a conventional digital terminal equipment and a slave exchange for time division, Fig. 2 is a diagram illustrating a frame structure of a communication path m, and Fig. 3 is a diagram showing a frame of a digital multiplexed communication path. A diagram illustrating a configuration. FIG. 4 is a diagram showing a fixed line accommodation system according to an embodiment of the present invention, and FIG. 5 is a diagram showing an example of the configuration of the digital terminal equipment in FIG. 4. In prison, DT and DT' are digital terminal equipment,
DTUO to DTU4 are digital terminal units, SG
U is a communication path for control signals, MPX is a multiplexer, TD-N
W is a time division network. SUB is the subscriber, LC is the subscriber circuit, FLC is the fixed line subscriber circuit, DI is the add/drop circuit, and CC is the central NIj.
The control equipment and HW are digital multiplex communication paths. CHGO to CHG4 are communication path groups, and I is an insertion circuit. RAM0, RAM1, RAM2 #, t memory, c
rL is a control circuit, C'l'R is a counting circuit, Wl and W
2 is a write instruction signal, R1 and R2Fi are read instruction signals. 5CHG control signal communication path group, FFi frame, Fb is synchronization bit, TS is time slot, CH is communication path, ■
is the audio signal, S is the control signal, VCHFi audio signal path, s
awit control signal path.薯 1rjJ 22nd 3rd f:fJ Dream/4 Figure

Claims (1)

[Claims] a plurality of channels, each transmitting an IIP signal and a control signal;
; 86 t- A digital terminal equipment that constitutes a digital multiplexed communication path consisting of a plurality of accommodating digital terminal units and a multiplexer and equipped with an audio separation type control signal path, wherein the digital multiplexed communication path The control signal of the predetermined route included in the voice separation format control signal 7 route is
A patented fixed line accommodating system that transmits the audio of a specified communication path assigned to the digital end F-Schnitt as ``i''i.