JPH0459811B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a conveyance line relay method, and in particular to a conveyance line in which repeaters for an independent coaxial conveyance line and a balanced paired conveyance line are accommodated and relayed in the same repeater housing enclosure. This relates to a relay method. [Prior Art and Problems] Fig. 1 is a block diagram for explaining a conventional carrier line relay method, in which a shows a route of a carrier line using coaxial core wires, b shows a route of a carrier line using balanced pairs, are shown respectively. The route of the carrier line using coaxial core wires shown in Figure a transmits signals from the end station equipment in station building 1 through the coaxial core wires in coaxial cable 2, but the signal may be attenuated due to transmission loss along the way. Therefore, repeaters 3 are installed at certain regular intervals, and the attenuated signal is amplified by the repeaters 3. In addition, the route of the conveyance line using the balanced pair shown in figure b is the station building 4.
The signal is transmitted by a balanced line in the balanced pair cable 5, and for the same reason, repeaters 6 are installed at regular intervals to compensate for transmission loss. As mentioned above, each independent conveyance line,
A plurality of independent repeaters are arranged in series on the conveyance line, and each repeater is installed at a relay point. FIG. 2 is a sectional view showing an example of a coaxial cable. This coaxial cable 2 is made up of a coaxial core wire 7 and a balanced pair wire 8 used as a maintenance line. Types of coaxial core wire include standard coaxial core wire with an outer conductor diameter of 9.5 mm, and fine coaxial core wire with an outer conductor diameter of 4.4 mm. The balanced pair wire 8 for maintenance is generally used for maintenance of coaxial conveyance lines, and has a wire diameter of 0.9 mm.
There are pairs of wires of 0.65mm and pairs of wires of 0.65mm. Coaxial conveyance methods include 4M method, 12M method,
There are 60M system, etc., and the relay interval differs depending on the type of coaxial core wire and the combination of conveyance method. FIG. 3 is a cross-sectional view of one example of a balanced pair cable. This balanced pair cable 5 is a collection of a balanced pair wire 9 and a balanced pair wire 10 used as a line for maintenance. Generally, the same type of wire material is used for the balanced pair wire 9 and the maintenance balanced pair wire 10, such as a pair wire with a wire diameter of 0.9 mm.
There are 0.65mm pair wires, etc. Conveyance method is PCM-24
and PCM-30 systems, etc., and the relay interval differs depending on the balanced pair wire material and conveyance method. In general, coaxial line transport systems have a large transmission capacity and are expensive for systems such as cables, repeaters, and terminal equipment, but they are efficient for long-distance transport, so they are suitable for major transport trunk lines (several hundred kilometers). . On the other hand, the system price of the balanced pair transmission system is low, but the transmission capacity is small, so it is suitable for short-distance transport. Conventionally, the conveyance routes of the above-mentioned coaxial line conveyance system and balanced pair line conveyance system may partially or completely overlap, and as shown in Table 1, there have been cases where their relay intervals are the same.

[Purpose of the invention]

In view of the above conventional problems, the present invention combines a coaxial line transfer type repeater and a balanced line transfer type repeater.
The purpose of the present invention is to provide an efficient method for relaying a conveyance line in which the relays are housed all in one body. [Structure of the Invention] According to the present invention, the above object is to provide a coaxial conveyance line using a coaxial core wire and a balanced pair wire, in which each independent conveyance line and independent repeaters are installed in series at a plurality of locations on the conveyance line. In a conveyance line where part or all of the routes of the balanced pair conveyor line overlap, the repeater installation point of the coaxial conveyance line and the repeater installation point of the balanced pair conveyor line are set to match, and the relay is made to be the same. At each point, the repeaters for each line are housed in the same repeater-accommodating enclosure, and the above-mentioned repeaters are connected and relayed using a composite cable containing a coaxial core wire and a balanced pair wire in the line cable of the route section. This is achieved by a conveyance line relay method characterized in that: [Embodiments of the Invention] Hereinafter, the present invention will be described in detail in Examples with reference to the drawings. FIG. 4 is a diagram for explaining the conveyance line relay method according to the present invention. In the same figure, 11,1
1' is a composite cable containing a coaxial core wire and a balanced pair wire, 12 is a repeater housing case, 13 is a repeater for a coaxial carrier line, 14 is a repeater for a balanced pair carrier line,
Reference numeral 15 indicates a coaxial core wire, 16 and 17 a balanced pair of wires, and 18 a maintenance function section. In addition, 19 is a coaxial cable, 20 is a repeater housing housing housing a repeater dedicated to a coaxial carrier line, 21 is a balanced pair cable, and 22 is a relay containing a repeater exclusively for a balanced pair carrier line. The housing housing 23 is a cable connection portion between the coaxial cable 19, the balanced pair cable 21, and the composite cable. As shown in FIG.
A general-purpose repeater 24 is configured by accommodating the repeater 13 and a balanced pair carrier line (PCM-24) repeater 14. A maintenance function section 18 is also accommodated within the body 12 . Connection of the coaxial conveyance line route and the balanced paired conveyance line route is performed as follows. The coaxial cable 19 passed through the dedicated repeater housing enclosure 20 for the coaxial carrier line, and the balanced pair cable 21 passed through the dedicated repeater housing enclosure 22 for the balanced pair carrier line.
is connected to the composite cable 11 at the cable connection part 23, and the coaxial core wire 15 of the composite cable 11 is connected to the repeater 13 of the coaxial carrier line, and also the balanced pair wire 16
is connected to the repeater 14 of the balanced pair carrier line. The maintenance balanced pair 17 is connected to the maintenance function section 18 . The general-purpose repeaters 24 are then connected to each other by the composite cable 11'. FIG. 5 is a block diagram for explaining an embodiment in which the carrier line relay method of the present invention is used in a portion where the route of the coaxial carrier line and the route of the balanced pair carrier line overlap. In the figure, 25 and 26 are terminal stations, 11 and 11' are composite cables, 19 is a coaxial cable, 20 is a case for accommodating a dedicated repeater for the coaxial carrier line, 21 is a balanced pair cable, and 22 is a balanced pair carrier line. 24 represents a dedicated repeater housing case, and 24 represents a general-purpose repeater. In this example, under the conditions shown in Table 1 above, the repeater installation intervals are adjusted so that they are at the same point, so that the repeater intervals are equal, and the areas where the routes of the conveyance lines overlap are 27 shows composite cables 11, 11' and general-purpose repeater 2 using the method of the present invention.
4 was used. Relaying the non-overlapping portions of the coaxial cable 19 coming out of the terminal station 25 of the coaxial carrier line route and the balanced pair cable 21 coming out of the terminal station 26 of the balanced pair carrier line route is as follows:
A dedicated repeater-accommodating enclosure 20 for a coaxial conveyance line, and a dedicated repeater-accommodating enclosure 22 for a balanced pair conveyance line.
It is now being done in In this way, this embodiment uses a general-purpose repeater that accommodates a coaxial carrier line repeater and a balanced pair carrier line repeater together in the overlapping part of the coaxial and balanced pair carrier line routes, compared to the conventional one. This makes it possible to save installation space and installation work costs for the housing structure. As described above, the present invention uses a composite cable containing a coaxial core wire and a balanced pair wire, and relays different types of carrier repeaters by accommodating them in a single repeater-accommodating enclosure, but there are other application examples. It is also possible to accommodate different types of carrier lines using optical fiber lines and balanced pairs, or optical fibers and waveguides, and two or more repeaters in one repeater-accommodating enclosure.
An efficient conveyance line can be provided. Furthermore, if there are overlapping routes and the relay intervals do not match, a dedicated repeater 28 may be installed as necessary, as shown in the block diagram of FIG. In this figure, the same parts as in FIG. 5 are designated with the same reference numerals. [Effects of the Invention] As explained in detail above, the method of the present invention has the following effects:
The relay point of the coaxial conveyance line and the relay point of the balanced pair conveyor line are set to coincide, and at the same point, the repeater of the coaxial conveyance line and the relay point of the balanced pair conveyor line are placed in one repeater housing body. By accommodating the repeater of the conveyance line together and connecting it using a composite cable, it is possible to save installation space for the repeater housing enclosure and to save on installation and construction costs, making it more efficient. This has a great effect in that it can provide a transport line that is suitable for transportation.

[Brief explanation of the drawing]

Figure 1 is a diagram for explaining the conventional relay method.
Figure 2 is a sectional view showing an example of a coaxial cable, Figure 3 is a cross-sectional view showing an example of a coaxial cable.
The figure is a sectional view showing an example of a balanced pair cable, Figure 4 is a diagram for explaining the repeater housing enclosure and cable connection method according to the present invention, and Figure 5 is a coaxial conveyance line route and a balanced pair cable. FIG. 6 is a block diagram for explaining an embodiment in which the method of the present invention is applied to a portion where the route of the transport line overlaps, and FIG. 6 is a block diagram for explaining another embodiment. In the drawing, 11 and 11' are composite cables,
12 is a repeater housing case, 13 is a repeater for coaxial carrier line, 14 is a repeater for balanced pair carrier line, 15
denotes a coaxial core wire, 16 and 17 a balanced pair wire, and 18 a maintenance function section.

Claims (1)

[Claims] 1. Routes of a coaxial conveyance line using a coaxial core wire and a balanced pair conveyance line using a balanced pair wire, each having an independent conveyance line and an independent repeater connected to the conveyance line installed at a plurality of locations in series. For conveyor lines that partially or completely overlap, set the repeater installation points of the coaxial conveyor line and the repeater installation points of the balanced pair conveyor line to match, and relay each line at the same relay point. The device is housed in the body that accommodates the same repeater,
A carrier line relay method characterized in that the line cable in the route section is connected and relayed to each of the repeaters using a composite cable in which a coaxial core wire and a balanced pair wire are incorporated.