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61200375L1-1
TA 850
T1 RCU VoATM UIG/61200376L2-31A
Page 7 of 72
© 2001, ADTRAN, Inc. TA 850 User Manual
Canadian Equipment Limitations
Before installing this 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 be extended by means of a certified connector assembly (tele-
phone 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. Any repairs or alterations made by the user to this 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 waterpipe system, if present, are connected together.
This precaution may be particularly important in rural areas.
The Load Number (LN) assigned to each terminal device denotes the percentage of the total load
to be connected to a telephone loop which is used by the device, to prevent overloading. The ter-
mination on a loop may consist of any combination of devices subject only to the equipment that
the total of the LNs of all devices does not exceed 100.
The ringer equivalence number (REN) assigned to each terminal adapter is used to determine the
total number of devices that may be connected to each circuit. The sum of the RENs from all
devices in the circuit should not exceed a total of 5.0.
The Industry Canada Certification label identifies certified equipment. This
certification means that the equipment meets certain telecommunications
network protective, operational, and safety requirements. The Department of
Commerce does not guarantee the equipment will operate to the user's
satisfaction.
Users should not attempt to make such connections themselves, but should contact
the appropriate electric inspection authority, or an electrician, as appropriate.