Install PRI hardware 207sockets, align the mounting holes on the daughterboard (Figure 79"Daughterboard installation on the NTAK09" (page 208)) with thetops of the standoffs on the NTAK09.4 Slowly lower the daughterboard toward the NTAK09, keeping thestandoffs in line with all four holes, until the holes rest on top of thefour standoffs.Note: If more than a very slight amount of pressure is required atthis point, the connector pins are not aligned with the connectorsocket. If so, lift the daughterboard off the NTAK09 and returnto step 2.5 Gently apply pressure along the edge of the board where theconnector is located until the standoffs at the two corners adjacent tothe connector snap into a locked position. Then press down on thetwo corners on the opposite side until they also are locked into place.—End—Use these guidelines to remove the NTAK20 Clock Controller (CC) and theNTAK93 DCHI or NTBK51 DDCH daughterboards from the NTAK09 DTI/PRIcard. Because of the physical layout of the mother and daughterboards, theNTAK20 should be removed before the NTAK93 or NTBK51.Procedure 28Removing the daughterboards from the NTAK09Step Action1 Starting at the two corners opposite the connector, gently lift eachcorner out of the locking groove of the standoff.2 At the two corners adjacent to the connector, gently lift the entireside until the mounting holes are clear of the locking groove of thestandoff.3 To remove the connector pins, grasp the edge of the board adjacentto the connector and lift gently.If more than one NTAK09 card is installed, the additional cards mightnot carry daughterboards, depending on the system configuration.At least one NTAK20 (per system) is always required.—End—Nortel Communication Server 1000ISDN Primary Rate Interface Installation and CommissioningNN43001-301 02.03 StandardRelease 5.5 7 December 2007Copyright © 2003-2007, Nortel Networks.
