Compaq Armada V300 Series Reference Manual page 185

Users should ensure for their own protection that the electrical
ground connections of the power utility, telephone lines, and
internal metallic water pipe system, if present, are connected
together. This precaution may be particularly important in rural
areas.
The Ringer Equivalence Number (REN) assigned to each terminal
device provides an indication of the maximum number of
terminals allowed to be connected to a telephone interface. The
termination on an interface may consist of any combination of
devices, subject only to the requirement that the sum of the Ringer
Equivalence Numbers of all the devices does not exceed 5.0.
The Ringer Equivalence Number (REN) for this device does not
exceed 1.0.
For the location of the authorized Canadian maintenance facility
nearest you, call 1-800-OKCOMPAQ or contact:
Compaq Canada, Inc.
45 Vogell Road
Richmond Hill, Ontario L4B 3P6
The grant of a Telepermit for any item of terminal equipment
indicates only that Telecom has accepted that the item complies
with minimum conditions for connection to its network. It
indicates no endorsement of the product by Telecom, nor does it
provide any sort of warranty. Above all, it provides no assurance
that any item will work correctly in all respects with another item
of Telepermitted equipment of a different make or model, nor
does it imply that any product is compatible with all of Telecom's
network services.
This equipment is not capable, under all operating conditions, of
correct operation at the higher speeds for which it is designed.
Telecom will accept no responsibility should difficulties arise in
such circumstances.