G657A1 Direct Buried Fiber Cable

Basic Information
Place of Origin: CHINA
Brand Name: DAWNERGY
Certification: CE/TELCORDIA
Model Number: GYXTZW-12G.657A1
Minimum Order Quantity: 100KM
Packaging Details: Wooden DRUM
Delivery Time: 10-20 work days
Payment Terms: T/T, L/C, D/A, D/P
Supply Ability: 10,000KM PER DAY
Product: Duct And Direct Buried Optical Cable Fiber: G657A1
Armored: PE Coated Corrugated Steel Tape Strength Member: Steel Wire
Outer Sheath: LSZH, Black, Anti-UV Application: Duct And Direct Buried
No. Of Fiber Per Tube: 12
High Light:

G657A1 Direct Buried Fiber Cable


LSZH Direct Buried Fiber Cable


IEC 60793-1 Optic Fiber Cable

G657A1 Direct Buried Fiber Cable


ApplicationDuct and direct buried optical cable
  • Loose tube with max 12 fibers per tube, filled with thixotropic compound
  • Armor: PE coated corrugated steel tape
  • Strength member:steel wire
  • Outer sheath: LSZH, Black, anti-UV
Temperature Range

Storage and transport

-40 to +60°C


-20 to +60°C


-40 to +60°C

StandardsIEC 60793-1, IEC 60793-2, IEC 60794-3-10
Specification No.GL20200825323
Customer ReferenceCommon standard


Number of fibers 12
Loose tubes x fibers 1x12
Loose tubes/Dummies 1/0
Outer diametermm8.1±0.5

Note: sheath thickness not consider ripcord portion, sizes and values without tolerances are nominal values
Mechanical Properties

Max. tensile load Short term: 1500N;long term:600N 
Crush resistance / 10 cm Short term:1000N;long term:300N
Bending radius (installation) 20x cable Ø
Bending radius (operation) 10x cable Ø

See Point 6: Test Methods

G657A1 Direct Buried Fiber Cable 0
Optical Fiber

StandardITU-T G.657A1 UBIF®R10

Fiber attenuation
.. cabled

@ 1310 nm

≤0.36 dB/km

@ 1550 nm

≤0.22 dB/km

Mode field diameter (MFD)(8.6~9.2) ± 0.4 µm @1310nm
Zero dispersion wavelength1300~1324 nm
Zero dispersion slope≤0.092 ps/nm² ∙km
Polarization mode dispersion (PMD)≤0.2 ps/√km
Cable cut-off wavelength≤1260 nm

Macro bending loss
.. 10 turns Ø30 mm
.. 1 turn Ø20 mm

@1550 nm

≤0.25 dB

≤0.75 dB

@1625 nm

≤1.0 dB

≤1.5 dB

GeometricCladding diameter125 ± 0.7µm
Core/clad concentricity error≤0.5µm
Cladding non-circularity≤ 1.0%
MechanicalProof stress≥ 0.69Gpa

Test Methods

TestConditionsAcceptance criteria

Tensile strength
IEC 60794-1-2 E1

Tensile strength: see Point 3
Sample length: ≥ 50 m, Duration: 1 min

  • Fiber strain≤0.6%
  • △α ≤0.1dB during test
  • No damage

Crush resistance
IEC 60794-1-2 E3

Crush: see Point 3
Test duration: 1 min, number of test: 3

  • △α ≤0.05dB after test
  • No damage

IEC 60794-1-2 E4

Impact energy: 5 J
R = 300 mm, number of places/tests: 3

  • △α ≤0.1dB during and after test
  • No damage

IEC 60794-1-2 E7

Sample length: 2 m
± 180°, 5 cycles

  • △α ≤0.1dB during and after test
  • No damage

Repeated Bend
IEC 60794-1-2 E6

Bending radius: 20x cable Ø
25 cycles

  • No damage

Temperature cycling
IEC 60794-1-2 F1

-40℃→ +60℃
12 hours at each step, 2 cycles

  • △α≤0.15 dB/km and reversible
  • No damage

Water penetration
IEC 60794-1-2 F5

Sample length: 3 m
Water column height: 1 m
Test duration: 24 h

  • No water leakage

All optical measurements at 1550 nm (G652D) or 1300 nm (OM2/OM3/OM4)

Cable type




-5% / +5%

G657A1 Direct Buried Fiber Cable 1


D*d*B in cm


Drum Type






Dimensions including protection. Indicative values, actually delivered drum sizes and weights may deviate. Cable ends sealed with caps

Contact Details
Peter Bi

Phone Number : 0086 21 67877780

WhatsApp : +008615002176701