In addition to improving signal integrity, the UHM right angle socket was designed to be mechanically compatible with legacy 2mm HM designs. This required the connector to be intermateble with 2mm HM headers designed to the IEC 61076-4-101 standard. It also required the connector to be PCB footprint compatible. It is important to note that the UHM connector’s internal shielding is connected to the same PCB row as CompactPCI® EMI shields. This makes it possible to use the UHM socket as a ‘drop-in’ replacement for the existing connector on the daughter card.