The 555140-1 is an RJ11 modular jack designed for modem applications, featuring a side entry, face shield configuration with through-hole, low-profile mounting. This connector is specified with 6 positions and 6 contacts, and includes integrated panel grounds along with PCB grounds for enhanced shielding and grounding performance. The recommended panel cutout dimensions are 14.48 ± 0.13 mm by 13.72 ± 0.13 mm, with mounting holes positioned at 8.89 ± 0.06 mm and 10.16 ± 0.05 mm spacing. The connector's compact design and grounding features make it suitable for telecommunications equipment, modem interfaces, and other applications requiring reliable RJ11 connectivity with improved signal integrity.