Mount The Daughterboards On The Ntbk50 - Nortel Meridian 1 Option 11C Manual

Page 50 of 126 2.0 Mb PRI Implementation

Mount the daughterboards on the NTBK50

553-3011-315 Standard 13.00
Table 16
Switch SW3
Switch
SW 4-1
SW 4-2
Note: The usual method is to ground the outer conductor of the receive
coax signal.
Use the following procedure to mount and remove the NTAK20 CC and the
NTBK51 DDCH or NTAK93 DCHI daughterboards onto the NTBK50 PRI.
Install the NTAK93 or NTBK51 daughterboard before the NTAK20
daughterboard. Work on a flat surface when mounting or removing
daughterboards.
1 Visually inspect the connector pins on the underside of the
daughterboard. Any pins that are bent should be re-aligned prior to
mounting.
2 Place the NTBK50 down flat on an anti-static pad.
3 From an overhead viewpoint, with the daughterboard parallel above the
NTBK50 and the connector pins aligned over the connector sockets, line
up the mounting holes on the daughterboard with the tops of the standoffs
on the NTBK50 (see Figure 5 on page 51).
4 Slowly lower the daughterboard towards the NTBK50, keeping the
standoffs in line with all four holes, until the holes are resting on the tops
of the four standoffs.
If more than a very slight amount of pressure is required at this point, the
connector pins may not be aligned with the connector socket. If so, lift
the daughterboard off the NTBK50 and return to step 2.
5 Gently apply pressure along the edge of the board where the connector is
located until the standoffs at the two corners adjacent to the connector
snap into a locked position. Then press down on the two corners on the
opposite side until they also are locked into place.
January 2002
Down (On)
Rx—FGND
Tx—FGND
Up (Off)
Rx—OPEN
Tx—OPEN