G.703 ADAPTERS AND BALUN MATE II
2. Introduction
The G.703 Adapters and the Balun Mate II enable 75-ohm coaxial G.703 equipment/networks to communicate with 120-ohm twisted-pair G.703 equipment/networks. They’re specifically designed to address the Open Network Provision (ONP) requirement that European PTTs offer 120-ohm twisted- pair terminations to their customers. Some PTTs and private carriers had standardized on 75-ohm coax, or have customers whose CPE has only 75-ohm connections. The Adapters and the Balun Mate II help solve this termination mismatch by converting 75-ohm signals to 120-ohm signals and vice versa, at data rates up to full E1 speed (2.048 Mbps).
The MT255A-M model of the G.703 Adapter has a pair of 6" (15.2-cm) coaxial pigtails with male connectors that can plug into the female coaxial connectors of an existing device or termination.
The MT256A-F model of the G.703 Adapter has a pair of female coaxial connectors that existing coaxial cables can be plugged into.
