For 2 modular jack inserts. For system: CommScope (AVAYA / AT&T / Lucent Technologies), GigaSPEED, PowerSUM, 360 GS 10E to MGS 600-BK, M1 BH-xx, MPS 100E-xx. With R&M adapter R310694 suitable for R&M connection modules R305111, R305112, R305113 and R305114. Pitch: (WxH) approx. 16.9 x 17.9 mm. Without spreader. Check compatibility with other manufacturers not listed according to the specified pitch. You can find further information in the 'Communications Systems' manual or on the Internet.