Installation Preparations
TP-00102
13
What Are the Requirements for Telephone Service?
If you intend to use the Residential Gateway for digital telephone service, verify that
your home meets or exceeds all of the following requirements.
Maximum Number of Telephones
The RJ-11 telephone-style connectors on the Residential Gateway can each provide
telephone service to multiple telephones, fax machines, and analog modems.
The maximum number of telephone devices connected to each RJ-11 port is limited
by the total Ringing Load of the telephone devices that are connected. Many
telephone devices are marked with a Ringer Equivalent Number (REN). Each
telephone port on the Residential Gateway can support up to a 5 REN load.
The sum of the REN load on all of the telephone devices attached to each port must
not exceed 5 REN.
Telephone Device Types
You can use telephone devices that are not labeled with a REN number, but the
maximum number of attached telephone devices cannot be accurately calculated.
With telephone devices that are not labeled, each device should be connected and
the ring signal should be tested before adding more devices. If too many telephone
devices are attached and the ring signal can no longer be heard, telephone devices
should be removed until the ring signal works properly.
Telephones, fax machines, and other telephone devices use the center 2 pins of the
RJ-11 connectors to connect to your primary service.
Dialing Requirements
All your telephones should be set to use Dual-Tone Multi-Frequency (DTMF)
dialing. Pulse dialing may not be supported by your local service provider.
Telephone Wiring Requirements
The Residential Gateway supports connecting to the interior telephone wiring as
well as connecting directly to a telephone or fax machine. The maximum distance
from the unit to the most distant telephone device must not exceed 1000 feet (300
meters). Use 26-gauge twisted-pair, or larger, telephone wiring.
Important:
Connection to an existing or a new permanently installed home
telephone wiring network should be completed by a qualified installer or at the
direction of your telephone service provider.
