Vanguard Managed Solutions 650 - Manual (Page 21)

Getting Started 1-7
652/654 POTS With/Without Battery Backup
652/654 With POTS Support
Introduction The 652 and 654 offer the added feature of North American POTS (Plain Old
Telephone System) support via 2 POTS port (RJ11) connections. This means your
Vanguard 650 Series can handle both voice and data requirements from a single unit.
Types of
Equipment
Supported You can connect the following equipment to 652/654 POTS ports:
• Standard DTMF
• Answering machine
• Modem
• Group 3 Facsimile machine
POTS Support
Guidelines • The 652/654 supports only good quality telephone equipment. Contact your
local Vanguard sales representative for details on supported equipment.
• 652/654 POTS ports are intended for use with telephone equipment only. 652
POTS ports are not intended to drive existing house wiring for telephone
service. They are intended for use with standard desktop telephone
equipment, and should not be connected to publicly regulated analog lines.
• Each 652/654 POTS port supports a Ringer Equivalence (REN) of two. This
means the total REN of telephone equipment connected to each port cannot
exceed two. Standard telephone lines have a REN close to one. Modems,
facsimile machines, and main powered telephones may have a REN of 0.2.
Therefore, you can connect from two to four devices to each POTS port,
depending on the type of telephone equipment you are operating.
• Each POTS port is connected to the other. The main line, marked as such on
the backplane, is connected between pins 3 and 4, while the second line is
connected between pins 2 and 5. This arrangement enables the connection of a
two-line telephone or an extension of both ports with a single four-wire cable.
Note
Some modems and telephones may use pins 2 and 5 for purposes other than
connecting to a second line. Make sure the telephone equipment connected to the
POTS port is a two-lead cable.