1249C Series Central Office
The 1249C Series Central Office (CO) Cables are designed for use between switching and transmission equipment for distances up to 450 feet. With short twist lays, 1249C series offers superior crosstalk performance over standard telephone cable. It is manufactured with a dual foil shield for additional Electromagnetic Interference (EMI) reduction and is double jacketed for protection of the twisted pairs. The 1249C series meets or exceeds all applicable requirements of Telcordia GR-137 specifications.
Applications:
• T1/DS1
• T1C/DS1C
• DS2
Features:
• 26 AWG tinned copper conductors
• Solid color Polyolefin insulation
• 100 Ohm nominal Impedance
• Short pair lays/tight twists
• Dual aluminum foil shields
• Tinned copper drain wire
• CMR listed
• 75°C temperature rating
• Rip cord
• Solid color insulation
Benefits:
• Small diameter and light weight result in smaller cable bundles and easier handling; tinned copper conductors minimize change in wire-wrap joint resistance
• Greater crush resistance and improved transmission characteristics
• Impedance mismatch with Outside Plant (OSP) cables is minimized
• Improved crosstalk performance and pair identification
• Higher EMI isolation over a single foil shield
• Easier termination and superior grounding
• Suitable for horizontal and riser installations
• Added ease of jacket removal
• Easy identification of conductor ring mates
Specifications
Conductor: Tinned copper
AWG (mm): 26 (0.4)
Insulation: Solid polyolefin
Shield: Dual aluminum foil
Jacket: Gray PVC
Jacket Marking: Printed at 2 foot intervals on the jacket; information includes product identification, pair count, UL information and sequential lengths in feet and meters
Package: Reel
Standards Compliance:
• Telcordia GR-137-CORE
• Telcordia GR-499-CORE (Pulse shape compliance at 450 feet)
• UL 444 CMR
• RoHS-compliant
Part Numbers and Physical Characteristics
| PART NUMBER | PAIR COUNT | NOMINAL DIAMETER (mm) | APPROX. WEIGHT lbs/kft (kg/km) | STANDARD LENGTH FT (m) |
| 55-299-20 | 4 | 0.24 (6.1) | 27 (40) | 10,000 (3,048) |
| 55-399-20 | 6 | 0.27 (6.9) | 33 (49) | 10,000 (3,048) |
| 55-499-20 | 12 | 0.33 (8.4) | 50 (74) | 7,000 (2,133) |
| 55-599-20 | 16 | 0.37 (9.4) | 65 (97) | 7,000 (2,133) |
| 55-699-20 | 20 | 0.40 (10) | 75 (112) | 5,000 (1,524) |
| 55-799-20 | 25 | 0.43 (11) | 88 (131) | 5,000 (1,524) |
| 55-899-20 | 28 | 0.42 (11) | 93 (138) | 5,000 (1,524) |
| 55-999-20 | 30 | 0.45 (11) | 101 (150) | 4,000 (1,219) |
| 55-A99-20 | 32 | 0.46 (12) | 105 (156) | 4,000 (1,219) |
| 55-B99-20 | 50 | 0.55 (14) | 153 (228) | 3,000 (914) |
| 55-E99-20 | 100 | 0.73 (19) | 277 (412) | 3,000 (914) |
