Motorola 68230 - Vanguard 300 DSU/CSU Operator's Manual page 22

Installing
Introduction
After you unpack the Vanguard 300/305, you can connect the cabling to complete
the installation.
All Motorola Vanguard 300/305 devices should be used in environments designed
for computers and electronic equipment. In areas susceptible to lightning, take
precautions to prevent damage to electronic equipment. Contact your telephone
company, or an electronic accessories vendor, for information on lightning
protection equipment. Customers experiencing problems caused by surges from
lightning have eliminated such problems by installing appropriate surge
suppressors on power and data lines connected to Motorola Vanguard 300/305
devices.
Control Terminal Port
You can use Port 4 to connect to an asynchronous device for Control Terminal
Port (CTP) access. The Vanguard 300/305 defaults this port to 9.6 kbps, 8 bits, no
parity.
For a Vanguard 300, a DECconnect compatible cable is required.
For a Vanguard 305, a straight-through 8-conductor RJ45 cable (e.g., Inmac P/N
Q0462-1 or Black Box P/N RM-EL08MS-07) is required for the Vanguard 305.
See "Vanguard 300 Cabling Pinouts" under "Connecting to the CTP" in Chapter 2
for information about the pinouts of the RJ45 to DB25 adapter.
DSU telco cable
The DSU telco cable is twisted-pair 19 to 26 AWG. This cable is shipped with the
DSU daughtercard.
Vanguard 300 Ferrite Bead
This section explains how to install a ferrite bead to filter out line disturbances, on
your Vanguard 300, which could cause radio interference to radio and TV
reception. The bead is required for the Control Terminal Port connection cable
(Port 4 on the Vanguard 300), and a bead is included with each Vanguard 300.
Follow the instructions below to ensure the ferrite bead is properly installed.
Installing the Ferrite Bead on the CTP Cable
Before beginning, ensure that you have the cable shipped with your Vanguard
300.
1) Make sure you have the correct cable (for connection to the CTP (Port 4)).
2) Snugly wrap the cable once completely around the bead (see Figure 2-3).
3) Set the cable into the bead cutouts.