
ST4 Single Line Telephone
DP Dial Pulse
Tone Dialing
MF
User Guide
To place a call:
Lift handset + hear dial tone + dial number
To answer a call:
Lift handset when telephone rings
Message Waiting Lamp
Lights when you have messages
waiting (if your phone system
can send them). Also flashes
when your ST4 rings.
Dial Mode Switch
[On bottom of phone.]
When placing a call in DP
mode, you can dial * to
change to Tone Dialing.
Wall Mounting Instructions on back.
Last Number Redial
Lift handset and press LND
to redial your last call.
Flash
While on a call, press Flash for
outside line or PBX features.
(640 mS +/- 100 mS)
Volume Control
Use the three-position
volume control to set the
loudness of ringing.

Federal Communications Commission (FCC) Note
ST4 Without Message Waiting Lamp:
1. The ST4 complies with Part 68 of the FCC rules and incorporates FCC compliant
telephone cords, plugs and jacks. The label on the bottom of the telephone contains
the FCC registration number.
2. The REN of equipment is to be used to determine the quantity of devices which may
be connected to a telephone line. Exceeding the maximum allowed REN of the telephone line may result in telephones not ringing in response to an incoming call. In
most areas, but not all, the sum of the RENs must not exceed 5.0. To determine the
maximum allowed in your specific area, contact your local telephone company.
3. If it is determined that your equipment causes harm to the telephone network, the
telephone company will notify you in advance that temporary discontinuance of the
service is required. But if advance notice is not practical, the telephone company will
notify you as soon as possible. You may file a complaint with the FCC if you believe
it is necessary.
4. The telephone company may make changes in its facilities, equipment, operations or
procedures that could affect the operation of your equipment. If this happens the
telephone company will provide advance notice in order for you to make the necessary modifications to maintain uninterrupted service.
5. If this equipment is not operating properly, you should immediately remove it from
your telephone line, to prevent harm to the network, and contact NEC America (or
an authorized repair facility of NEC America). You should not attempt to make any
repairs on your own. For information, please contact:
NEC America, Inc., Corporate Networks Group
4 Forest Parkway, Shelton, CT 06484
TEL: 203-926-5400 FAX: 203-929-0535
6. This equipment cannot be used on coin service provided by the telephone company.
Connection to party line service is subject to state tariffs. Contact the state public
utility commission or corporation commission for information.
7. This equipment utilizes a telephone receiver that is Hearing Aid Compatible.
ST4 With Message Waiting Lamp:
In addition to the information above,
1. Your ST4 is designed for connection to a host system. Refer to the system’s installa-
tion manual for instructions on connecting a single line phone. The telephone is not
to be connected directly to the telephone network.

Industry Science Canada Note
ST4 Without Message Waiting Lamp:
Notice
The Canadian Department of Communications label identifies certified equipment. This
certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. The Department does not guarantee the
equipment will operate to the user’s satisfaction.
Before installing equipment, users should ensure that it is permissible to be connected to the
facilities of the local telecommunications company. The equipment must also be installed
using an acceptable method of connection. In some cases, the company’s inside wiring, associated with a single line individual service, may by extended by means of a certified connector assembly (telephone extension cord). The customer should be aware that compliance
with the above conditions may not prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Canadian maintenance
facility designated by the supplier. Do not attempt to make any repairs on your own. For
information, please contact your dealer.Any repairs or alterations made by the user to
equipment, or equipment malfunctions, may give the telecommunications company
cause to request the user to disconnect the equipment.
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.
CAUTION:
Users should not attempt to make such connections themselves, but should contact the appropriate electric inspection authority, or electrician, as appropriate.
Ringer Equivalence Number (REN)
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 of an interface may consist of any combination of devices
subject only to the requirement that sum of the Ringer Equivalence Numbers of all
devices does not exceed 5.
ST4 With Message Waiting Lamp:
In addition to the information above,
The ST4 telephone is to be connected to the analog station port of a host system.
The telephone is not to be connected directly to the telephone network.

Installing the Wall Mount Kit
88403-1
To wall-mount the phone:
1. Using the two screws provided (or
other suitable fasteners), attach the
wall-mount bracket to the wall.
2. Push the phone onto the
mounting tabs and slide down
until it clicks in place.
To store the handset without
hanging up:
1. Hang the handset on the handset
holder.
To install the handset hanger:
1. Use a small flat-blade screwdriver
to push the hanger out of the phone.
2. Invert the hanger and push it back
into the phone.
Handset
Holder
Retaining
Clips
88403 - 2
To remove the phone from the
wall:
1. Push in the two retaining tabs on
the bottom of the phone.
2. Slide the phone up off of the
wall-mount bracket.
85403MBG02
Issue 1-0
NEC America, Inc., Corporate Networks Group
4 Forest Parkway, Shelton, CT 06484
TEL: 203-926-5400 FAX: 203-929-0535
April 2001
Printed in U.S.A.
cng.nec.com