TWI764004B - High strength bending resistant small size optical cable - Google Patents
High strength bending resistant small size optical cableInfo
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Abstract
Description
本發明專利涉及一種外觀尺寸1.2±0.3 mm的室內佈線通信光纜，適用於光纖到戶（Fiber To The Home，FTTH）末端佈線以及電信機房內光終端配線架（Optical Line Distribution Frame，OLDF）與設備機架間連結的高強度耐彎曲細徑光纜。The patent of the present invention relates to an indoor wiring communication optical cable with an appearance size of 1.2±0.3 mm, which is suitable for fiber to the home (Fiber To The Home, FTTH) end wiring and optical terminal distribution frame (Optical Line Distribution Frame, OLDF) and equipment in the telecommunication room High-strength, bend-resistant, narrow-diameter fiber optic cables connected between racks.
FTTH末端佈線最常用的是扁平光纜（例如日本專利申請號JP 2006-162703A所載），其結構是取250mm光纖心線（1或2心），並在光纖心線之兩側各放置一條玻璃纖維強化塑膠（Fiberglass Reinforced Plastics，FRP）抗張體，再加耐燃PE被覆體組合完成光纜，光纜外徑為3.1±0.2 Í 2.0±0.2 mm。而後為了易於從光纜中間取出光纖，而有易撕型扁平光纜，如中國專利CN 201716441 U、CN 202305921 U、CN 202393952 U、CN 203025396 U。這些專利主要是在光纜耐燃PE被覆體外加上不同種類的凹槽，使光纜達到易撕的目的。這種扁平光纜承受的張力負載很小，常在佈放施工過程斷裂，且體積大也不適用於電信機房內OLDF與設備機架間連結。The most commonly used FTTH terminal wiring is a flat optical cable (such as that contained in Japanese Patent Application No. JP 2006-162703A), and its structure is to take a 250mm optical fiber core (1 or 2 cores), and place a glass on each side of the optical fiber core. Fiberglass Reinforced Plastics (FRP) tensile body is combined with flame-resistant PE coating to complete the optical cable. The outer diameter of the optical cable is 3.1±0.2 Í 2.0±0.2 mm. Then, in order to easily take out the optical fiber from the middle of the optical cable, there are easily tearable flat optical cables, such as Chinese patents CN 201716441 U, CN 202305921 U, CN 202393952 U, and CN 203025396 U. These patents mainly add different kinds of grooves on the flame-resistant PE coating of the optical cable to make the optical cable easy to tear. This kind of flat optical cable bears a small tension load, and is often broken during the deployment and construction process, and the large size is not suitable for the connection between the OLDF and the equipment rack in the telecommunications room.
目前電信機房內OLDF與設備機架間連結最常用的纜線是外徑2.9mm聚氯乙烯被覆光纜，其結構是於外徑125mm裸光纖，覆以紫外光硬化之自然色保護膜兩層後，成為外徑250mm光纖，再以一層白色緩衝層緊包被覆（Tight Buffer）成為900mm光纖心線。光纖心線周圍，縱放纖維狀之芳香族聚醯胺纖維做為抗張體之用。抗張體上以著色之聚氯乙烯（PVC）被覆成同心圓柱狀。此種光纜結構之缺點是外徑大，於現代高密度連結之電信機房，耗費收容空間以及將來機房擴充困難。此外，層層堆疊的水平或垂直光纜線槽，其於數量多時顯得錯綜複雜，且極易造成彎曲損失。At present, the most commonly used cable connecting the OLDF and the equipment rack in the telecommunications room is the PVC-coated optical cable with an outer diameter of 2.9mm. , to become an optical fiber with an outer diameter of 250mm, and then wrap it with a white buffer layer (Tight Buffer) to become a 900mm fiber core. Around the optical fiber core, fibrous aromatic polyamide fibers are placed vertically for tensile strength. The tensile body is coated with colored polyvinyl chloride (PVC) into concentric cylinders. The disadvantage of this type of optical cable structure is that the outer diameter is large, which consumes storage space in modern high-density connection telecommunication equipment rooms and makes it difficult to expand the equipment room in the future. In addition, the horizontal or vertical optical cable troughs stacked layer by layer appear intricate when the number is large, and it is very easy to cause bending loss.
本發明專利主要針對現有的FTTH末端佈線用纜線以及電信機房內OLDF與設備機架間連結的2.9mm聚氯乙烯被覆光纜之缺失，提出可同時應用於此二領域之高強度耐彎曲細徑光纜。The patent of the present invention is mainly aimed at the lack of the existing FTTH terminal wiring cable and the 2.9mm polyvinyl chloride-coated optical cable connecting the OLDF and the equipment rack in the telecommunication room, and proposes a high-strength bending-resistant narrow diameter that can be applied to these two fields at the same time. fiber optic cable.
為達上述目的，本發明專利高強度耐彎曲細徑光纜，提出解決先前技術中所述的問題，公開了一種高強度耐彎曲細徑光纜結構。以下將對整個創作進行程序作進一步說明。In order to achieve the above-mentioned purpose, the patented high-strength bending-resistant thin-diameter optical cable of the present invention proposes to solve the problems described in the prior art, and discloses a high-strength bending-resistant thin-diameter optical cable structure. The entire creation process will be further explained below.
（1）本發明專利所公開之光纜結構包括光纖心線，高強度抗張體和光纜被覆體。(1) The optical cable structure disclosed in the patent of the present invention includes an optical fiber core wire, a high-strength tensile body and an optical cable covering body.
（2）按上述方案，所述之光纖心線為單心單模光纖，其有二種不同外徑，其一採用符合ITU-TG.657A2外徑125mm之耐彎曲裸光纖材料，覆加以紫外光硬化之自然色保護膜兩層後，形成外徑250mm的光纖心線。(2) According to the above scheme, the optical fiber core is a single-core single-mode fiber, which has two different outer diameters, one of which is a bending-resistant bare fiber material with an outer diameter of 125mm in accordance with ITU-TG.657A2, and is covered with ultraviolet light. After two layers of light-hardened natural color protective film, an optical fiber core with an outer diameter of 250mm is formed.
（3）按上述方案，所述之另一種光纖心線為將上述250mm的光纖心線再以一層鐵氟龍（Teflon）被覆緩衝層緊包被覆（Tight Buffer），其完成外徑需在600 ±50 mm範圍內。(3) According to the above scheme, the other kind of optical fiber core wire is to cover the above-mentioned 250mm optical fiber core wire with a layer of Teflon (Teflon) coating buffer layer (Tight Buffer). within ±50 mm.
（4）按上述方案，所述之高強度芳香族聚醯胺纖維光纜抗張體有二種，其一光纜抗張體為直接採用400丹尼或1000丹尼之芳香族聚醯胺纖維為光纜抗張體。(4) According to the above scheme, there are two types of high-strength aromatic polyamide fiber optical cable tensile bodies, one of which is to directly use 400 denier or 1000 denier aromatic polyamide fibers for the tensile body. Fiber optic cable tensile body.
（5）另一光纜抗張體為以芳香族聚醯胺纖維為基體材料，再經紫外光複合液浸漬後進入模具孔擠壓拉伸，再經紫外光（UV）硬化為形成外徑約0.15~0.25mm光纜抗張體，使其拉斷力達到70N以上。(5) The other fiber optic cable tensile body is made of aromatic polyamide fiber as the matrix material, and then immersed in the ultraviolet light compound solution and then enters the mold hole for extrusion and stretching, and then hardened by ultraviolet light (UV) to form an outer diameter of about The tensile strength of 0.15~0.25mm optical cable can make its breaking force reach more than 70N.
（6）按上述方案所述之光纜被覆體採用著色之聚氯乙烯（PVC）被覆其厚度約0.15~0.30mm。(6) The optical cable covering body described in the above scheme is covered with colored polyvinyl chloride (PVC) and its thickness is about 0.15~0.30mm.
（7）按上述方案所述之高強度耐彎曲細徑光纜結構A為採用說明（2）所述之外徑250mm的光纖心線，其四周環繞5根說明（4）所述之400丹尼之芳香族聚醯胺纖維為光纜抗張體，最外層為說明（6）所述之光纜被覆體，光纜完成外徑為1.2±0.3 mm。(7) The structure A of the high-strength, bending-resistant and thin-diameter optical fiber cable described in the above scheme is the use of the optical fiber core wire with the outer diameter of 250 mm described in the description (2), surrounded by five 400 denier wires described in the description (4). The aromatic polyamide fiber is the tensile body of the optical cable, the outermost layer is the optical cable covering body described in (6), and the finished outer diameter of the optical cable is 1.2±0.3 mm.
（8）按上述方案所述之高強度耐彎曲細徑光纜結構B為採用說明（2）所述之外徑250mm的光纖心線，其四周環繞2根說明（4）所述之1000丹尼之芳香族聚醯胺纖維為光纜抗張體，最外層為說明（6）所述之光纜被覆體，光纜完成外徑為1.2±0.3 mm。(8) The structure B of the high-strength, bending-resistant and thin-diameter optical fiber cable described in the above scheme adopts the optical fiber core wire with the outer diameter of 250 mm described in the description (2), surrounded by two 1000 denier wires described in the description (4). The aromatic polyamide fiber is the tensile body of the optical cable, the outermost layer is the optical cable covering body described in (6), and the finished outer diameter of the optical cable is 1.2±0.3 mm.
（9）按上述方案所述之高強度耐彎曲細徑光纜結構C為採用說明（3）所述之外徑600mm的光纖心線，其四周環繞4根說明（4）所述之400丹尼之芳香族聚醯胺纖維為光纜抗張體，最外層為說明（6）所述之光纜被覆體，光纜完成外徑為1.2±0.3 mm。(9) The structure C of the high-strength, bending-resistant and thin-diameter optical fiber cable described in the above plan is to use the optical fiber core wire with the outer diameter of 600 mm described in the description (3), surrounded by four 400 denier cables described in the description (4). The aromatic polyamide fiber is the tensile body of the optical cable, the outermost layer is the optical cable covering body described in (6), and the finished outer diameter of the optical cable is 1.2±0.3 mm.
（10）按上述方案所述之高強度耐彎曲細徑光纜結構D為採用說明（3）所述之外徑600mm的光纖心線，其四周環繞8根說明（5）所述之經UV固化之芳香族聚醯胺纖維為光纜抗張體，最外層為說明（6）所述之光纜被覆體，光纜完成外徑為1.2±0.3 mm。(10) The structure D of the high-strength, bending-resistant and thin-diameter optical fiber cable described in the above scheme is the use of the optical fiber core wire with the outer diameter of 600 mm described in the description (3), surrounded by 8 UV-cured cables described in the description (5). The aromatic polyamide fiber is the tensile body of the optical cable, the outermost layer is the optical cable covering body described in (6), and the finished outer diameter of the optical cable is 1.2±0.3 mm.
（11）綜合以上製造技術的使用，使該規格為1.2±0.3 mm的室內佈線光纜實現了細徑小尺寸、高強度、耐彎曲、重量輕盈、傳輸資訊容量大、速度快、便於安裝、使用壽命長、更適用於FTTH末端佈線以及電信機房內OLDF與設備機架間連結等室內場合、可有效改善目前光纖導槽擁擠不堪之現狀，以及提高機房配線密度等實用效果。(11) Combining the use of the above manufacturing technologies, the indoor wiring optical cable with a specification of 1.2±0.3 mm realizes small diameter and small size, high strength, bending resistance, light weight, large transmission information capacity, high speed, and easy installation and use. It has a long service life and is more suitable for indoor occasions such as FTTH terminal wiring and connection between OLDF and equipment racks in telecommunication equipment rooms.
為讓本發明的上述特徵和優點能更明顯易懂，下文特舉實施例，並配合所附圖式作詳細說明如下。In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.
本發明的高強度耐彎曲細徑光纜，是由250mm或600mm的光纖心線，其外環繞一層高強度芳香族聚醯胺纖維或經UV硬化後之高強度芳香族聚醯胺纖維光纜抗張體基體單元為光纜抗張體，再以光纜被覆體包覆所形成之一種高強度耐彎曲細徑光纜。本發明是一種適合於FTTH末端佈線以及電信機房內OLDF與設備機架間連結的高強度耐彎曲細徑光纜（外徑1.2mm）。以下將描述具體之實施例以說明本發明專利之實施態樣，惟其並非用以限制本發明所欲保護之範疇。為達成目的與功效易於瞭解，下面結合具體圖式，進一步闡釋本發明專利。請參閱圖1及圖2。The high-strength, bending-resistant and fine-diameter optical cable of the present invention is composed of a 250mm or 600mm optical fiber core, which is surrounded by a layer of high-strength aromatic polyamide fiber or a high-strength aromatic polyamide fiber optical cable after UV curing. The body-base unit is the tensile body of the optical cable, which is then coated with the optical cable covering body to form a high-strength, bending-resistant and narrow-diameter optical cable. The invention is a high-strength, bending-resistant and thin-diameter optical cable (outer diameter 1.2 mm) suitable for FTTH terminal wiring and connection between OLDF and equipment racks in telecommunication equipment rooms. Specific embodiments will be described below to illustrate the implementation of the patent of the present invention, but are not intended to limit the scope of protection of the present invention. In order to achieve the purpose and effect and be easy to understand, the patent of the present invention is further explained below in conjunction with the specific drawings. Please refer to Figure 1 and Figure 2.
本發明專利所公開之光纜結構包括光纖心線3，高強度抗張體4和光纜被覆體5，依選用之光纖心線及高強度抗張體不同，有四種不同之結構。The optical cable structure disclosed in the patent of the present invention includes an
所述之光纖心線為單心單模光纖具有二種不同外徑，其一採用符合ITU-TG.657A2外徑125mm之耐彎曲裸光纖材料，覆加以紫外線硬化之自然色保護膜兩層後，形成外徑250mm的光纖心線。The optical fiber core is a single-core single-mode optical fiber with two different outer diameters, one of which is made of a bending-resistant bare fiber material that conforms to ITU-TG.657A2 with an outer diameter of 125mm, and is covered with two layers of UV-cured natural color protective film. , forming an optical fiber core with an outer diameter of 250mm.
所述之第二種光纖心線為將上述250mm的光纖心線，再以一層鐵氟龍被覆緩衝層緊包被覆成為外徑600 ±50 mm光纖心線。The second type of optical fiber core wire is the above-mentioned 250mm optical fiber core wire, and then tightly coated with a layer of Teflon-coated buffer layer to form an optical fiber core wire with an outer diameter of 600 ± 50 mm.
所述之高強度芳香族聚醯胺纖維光纜抗張體有二種，其一為直接採用400丹尼或1000丹尼之芳香族聚醯胺纖維1為光纜抗張體，其二為以芳香族聚醯胺纖維為基體材料，再經紫外光複合液浸漬後進入模具孔擠壓拉伸，再經紫外光硬化為形成外徑約0.15~0.25 mm之光纜抗張體基體單元2其拉斷力達到70N以上。There are two kinds of high-strength aromatic polyamide fiber optical cable tensile bodies, one is to directly use 400 denier or 1000 denier
所述之光纜被覆體採用著色之聚氯乙烯（PVC）被覆其厚度約0.15~0.30mm。The optical cable covering body is covered with colored polyvinyl chloride (PVC) and its thickness is about 0.15~0.30mm.
按上述方案所述之光纜結構A為採用外徑250mm的光纖心線，其四周環繞5根400丹尼之芳香族聚醯胺纖維為光纜抗張體，最外層為厚度約0.15~0.30mm光纜被覆體，光纜完成外徑為1.2±0.3 mm。The optical fiber cable structure A described in the above scheme is an optical fiber core wire with an outer diameter of 250mm, surrounded by five 400-denier aromatic polyamide fibers as the optical cable tensile body, and the outermost layer is an optical fiber cable with a thickness of about 0.15~0.30mm The outer diameter of the coating and the optical cable is 1.2±0.3 mm.
按上述方案所述之光纜結構B為採用外徑250mm的光纖心線，其四周環繞2根1000丹尼之芳香族聚醯胺纖維為光纜抗張體，最外層為厚度約0.15~0.30mm光纜被覆體，光纜完成外徑為1.2±0.3 mm。The optical fiber cable structure B described in the above scheme is an optical fiber core wire with an outer diameter of 250mm, surrounded by two 1000-denier aromatic polyamide fibers as the optical cable tensile body, and the outermost layer is an optical fiber cable with a thickness of about 0.15~0.30mm The outer diameter of the coating and the optical cable is 1.2±0.3 mm.
按上述方案所述之光纜結構C為採用外徑600mm的光纖心線，其四周環繞4根400丹尼之芳香族聚醯胺纖維為光纜抗張體，最外層為厚度約0.15~0.30mm光纜被覆體，光纜完成外徑為1.2±0.3 mm。The optical fiber cable structure C described in the above scheme is an optical fiber core wire with an outer diameter of 600mm, surrounded by four 400-denier aromatic polyamide fibers as the optical cable tensile body, and the outermost layer is an optical fiber cable with a thickness of about 0.15~0.30mm The outer diameter of the coating and the optical cable is 1.2±0.3 mm.
按上述方案所述之光纜結構D為採用外徑600mm的光纖心線，其四周環繞8根經UV固化之芳香族聚醯胺纖維光纜抗張體基體單元作為光纜抗張體，最外層為厚度約0.15~0.30mm光纜被覆體，光纜完成外徑為1.2±0.3 mm。According to the optical cable structure D described in the above scheme, an optical fiber core wire with an outer diameter of 600 mm is used, surrounded by eight UV-cured aromatic polyamide fiber optical cable tensile body base units as the optical cable tensile body, and the outermost layer is the thickness of About 0.15~0.30mm optical cable covering body, the outer diameter of optical cable is 1.2±0.3 mm.
本發明的高強度耐彎曲細徑光纜極易與現有之光纖連接器組件，加以組合成細徑光纖跳接線（patch cord），或作為FTTH最後一哩之室內佈線。The high-strength, bend-resistant, narrow-diameter optical fiber cable of the present invention can be easily combined with existing optical fiber connector assemblies to form a narrow-diameter optical fiber patch cord, or as an indoor wiring in the last mile of FTTH.
上列詳細說明乃針對本發明之一可行實施例進行具體說明，惟該實施例並非用以限制本發明之專利範圍，凡未脫離本發明技藝精神所為之等效實施或變更，均應包含於本案之專利範圍中。The above detailed description is for a specific description of a feasible embodiment of the present invention, but the embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the technical spirit of the present invention shall be included in the within the scope of the patent in this case.
本發明高強度耐彎曲細徑光纜與FTTH末端佈線最常用的扁平光纜及目前電信機房內OLDF與設備機架間連結最常用的外徑2.9mm聚氯乙烯被覆光纜相互比較時，更具備下列優點。The high-strength bending-resistant thin-diameter optical cable of the present invention has the following advantages when compared with the flat optical cable most commonly used for FTTH terminal wiring and the PVC-coated optical cable with an outer diameter of 2.9 mm which is the most commonly used connection between the OLDF and the equipment rack in the current telecommunication room .
本發明的光纜抗張體基體單元係以芳香族聚醯胺纖維為基體，經紫外光複合液浸漬後進入模具孔擠壓拉伸，再經紫外光硬化為外徑0.15~0.20 mm光纜抗張體基體單元，使其拉力達到70N以上。上述芳香族聚醯胺纖維光纜抗張體基體單元可以提高光纜的整體拉伸強度，保證光纜在施工使用中由於纜體中的芳香族聚醯胺纖維的高強拉力性能而不易被拉斷，從而保護了光纜中的光纖不易被拉斷。The fiber optic cable tensile body matrix unit of the invention is based on the aromatic polyamide fiber as the matrix, which is immersed in the ultraviolet light composite liquid and then enters the mold hole for extrusion and stretching, and then is hardened by the ultraviolet light to make the optical cable tensile strength of the outer diameter 0.15~0.20 mm. Body-base unit, so that its tensile force reaches more than 70N. The above-mentioned aromatic polyamide fiber optical cable tensile body base unit can improve the overall tensile strength of the optical cable, and ensure that the optical cable is not easily broken due to the high-strength tensile properties of the aromatic polyamide fiber in the cable body during construction and use. The optical fiber in the optical cable is protected from being pulled off easily.
電信機房大量使用2.9mm單心光纖跳接線作為跳線基本單位耗費收容空間，外徑大，幾乎占滿光纖導槽，將來機房擴充困難。此外、跳接線層層堆疊於線槽，光纜易因彎曲或層層交疊而造成損失增加。若使用本發明的高強度耐彎曲細徑光纜跳接，可增加水平或垂直光纜理線空間4倍以上，提高機房光終端收容心數及密度，並為電信機房關鍵器材節省機房空間。A large number of 2.9mm single-core optical fiber patch cords are used in the telecom equipment room as the basic unit of the patch cord, which consumes storage space, and the outer diameter is large, which almost fills the optical fiber guide groove. It will be difficult to expand the equipment room in the future. In addition, the jumper wires are stacked in the wire trough layer by layer, and the optical cable is prone to increase in loss due to bending or overlapping layers. If the high-strength, bending-resistant and thin-diameter optical cable jumper of the present invention is used, the horizontal or vertical optical cable management space can be increased by more than 4 times, the number and density of optical terminals in the computer room can be increased, and the computer room space can be saved for the key equipment of the telecommunication computer room.
本發明的有益效果是，該特種高強度抗彎折芳香族聚醯胺纖維光纜抗張體及使用該抗張體的光纜，具有彎曲半徑小、抗折疊、尺寸小（1.2mm）、重量輕盈、傳輸資訊容量大、速度快、便於安裝施工、使用壽命長、更適用於作為FTTH末端佈線，以及設置於電信機房內OLDF與設備機架間連結等室內場合。The beneficial effects of the present invention are that the tensile body of the special high-strength anti-bending aromatic polyamide fiber optical cable and the optical cable using the tensile body have the advantages of small bending radius, anti-folding, small size (1.2mm), and light weight. , Large capacity of transmission information, fast speed, easy installation and construction, long service life, more suitable for FTTH terminal wiring, and indoor occasions such as the connection between OLDF and equipment racks in the telecommunications room.
綜上所述，本案不僅於技術思想上確屬創新，並具備習用之傳統方法所不及之上述多項功效，已充分符合新穎性及進步性之法定發明專利要件，爰依法提出申請，懇請貴局核准本件發明專利申請案，以勵發明，至感德便。To sum up, this case is not only innovative in terms of technical ideas, but also has many of the above-mentioned effects that the conventional methods cannot achieve. It has fully met the requirements of the statutory invention patent for novelty and progress. You can file an application in accordance with the law. Approval of this patent application for invention, in order to encourage invention, is very convenient.
雖然本發明已以實施例揭露如上，然其並非用以限定本發明，任何所屬技術領域中具有通常知識者，在不脫離本發明的精神和範圍內，當可作些許的更動與潤飾，故本發明的保護範圍當視後附的申請專利範圍所界定者為準。Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the appended patent application.
1:芳香族聚醯胺纖維 2:光纜抗張體基體單元 3:光纖心線 4:光纜抗張體 5:光纜被覆體1: Aromatic polyamide fiber 2: Optical cable tensile body base unit 3: Optical fiber core 4: Optical cable tensile body 5: Optical cable covering
圖1繪示經UV硬化之芳香族聚醯胺纖維光纜抗張體基體單元結構示意圖。 圖2繪示高強度耐彎曲細徑光纜結構示意圖。FIG. 1 is a schematic diagram showing the structure of the tensile body matrix unit of the UV-cured aromatic polyamide fiber optic cable. FIG. 2 is a schematic diagram illustrating the structure of a high-strength, bending-resistant, narrow-diameter optical cable.
3:光纖心線 3: Optical fiber core
4:光纜抗張體 4: Optical cable tensile body
5:光纜被覆體 5: Optical cable covering
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| TW201219873A (en) * | 2010-09-13 | 2012-05-16 | Asahi Glass Co Ltd | Plastic optical fiber unit and plastic optical fiber cable using same |
| WO2018221142A1 (en) * | 2017-06-02 | 2018-12-06 | 株式会社フジクラ | Optical fiber cable and method for manufacturing optical fiber cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201219873A (en) * | 2010-09-13 | 2012-05-16 | Asahi Glass Co Ltd | Plastic optical fiber unit and plastic optical fiber cable using same |
| WO2018221142A1 (en) * | 2017-06-02 | 2018-12-06 | 株式会社フジクラ | Optical fiber cable and method for manufacturing optical fiber cable |
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