• Cisco E1 G.703 75Ω to 120Ω RJ-45 balun adapter 4-pack
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Cisco

Cisco CAB-ADPT4PK-75-120 | E1 G.703 75Ω coax↔120Ω RJ‑45 balun adapters, dual BNC, 4‑pack

CAB-ADPT4PK-75-120

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Description

Adapter set for converting 75Ω unbalanced E1 (dual BNC coax) to 120Ω balanced RJ‑45 for use with Cisco 7000/7500 E1/PRI interfaces. Passive impedance‑matching baluns maintain signal integrity for carrier‑grade G.703 circuits. Ideal for interfacing 75Ω provider handoffs to 120Ω router ports.

Features

- Passive impedance matching for reliable E1 transport
- Dual‑BNC to RJ‑45 conversion for 75Ω↔120Ω environments
- Plug‑and‑play with no configuration
- Carrier‑grade G.703 compliance
- Supplied as a convenient 4‑pack

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- Function: 75Ω (unbalanced) ↔ 120Ω (balanced) impedance conversion for E1
- Standards: ITU‑T G.703/G.704 E1 (2.048 Mbps)
- Connectors: Dual BNC (75Ω) to RJ‑45 (120Ω)
- Type: Passive balun adapter (no external power)
- Quantity: 4 adapters per pack
- Use case: 75Ω coax service handoff to 120Ω RJ‑45 router interface
- Compatibility: Cisco 7000/7500 E1/PRI interface modules (and similar 120Ω E1 ports)
- Shielding: 75Ω coaxial path with impedance‑matched design
- Operating mode: Transparent to framing/signaling (e.g., CAS/PRI)

FAQs

Q: What does this adapter pack do?
A: It converts between 75Ω dual‑BNC E1 coax and 120Ω RJ‑45 balanced E1 to match carrier handoffs to router E1/PRI ports.

Q: Is external power required?
A: No. These are passive baluns and require no external power.

Q: Which equipment is it compatible with?
A: Cisco 7000/7500 series E1/PRI modules and other devices with 120Ω RJ‑45 E1 ports. Always verify pinout and platform support.

Q: Does it affect framing or signaling?
A: No. It is transparent and preserves the E1 signal; framing (G.704) and signaling are handled by your endpoints.

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