Motorola 68230 - Vanguard 300 DSU/CSU Operator's Manual page 65

Procedure to Remove SIMMs
Use the following procedure to remove SIMMs.
Step Action
Disengage the locking tabs by pushing them outward and, at the same
1
time, press against the side with the chips so the SIMM disengages from
the locking tabs.
Lift out the SIMM.
2
Adding or Replacing a DSU Daughtercard
Overview
This section describes how to add or replace the DSU daughtercard.
The DSU daughtercard provides an RJ48S connector on Port 1 and comes
installed from the factory if you ordered a daughtercard. It supports speeds of 56
kbps (synchronous), and does not support multipoint.
DSU Functionality
The DSU daughtercard functionality suits an extended range of 56 kbps point-to-
point DDS1 interface for North American service that conforms to AT&T 62310
or ANSI T1E1.4/91-006.
The DSU daughtercard is FCC Part 68 registered.
The DSU normally uses external clocking derived from the network.
Diagnostic loopbacks from the telephone company are supported; local
diagnostics are activated from the CTP.