Clear-Com TEL-14 - Manual (Page 20)

T E L - 1 4 T W O - C H A N N E L T E L E P H O N E I N T E R F A C E 2 - 6
impedance of the line be within these standards. The length of the telephone line
between the TEL-14 and the Central Telephone Office should not be excessively
long.
OPTION SWITCH SETTINGS
The TEL-14's panel controls and internal option switches can select any one of a
large number of modes of operation for the TEL-14. The following subjects are
covered in the following paragraphs:
• Default option switch settings
• Matrix compatibility
• Individual option switch descriptions
• Option switch settings for 5 typical modes of operation
Default Option Switch Settings
Figure 2-3 shows the option switches for each line in their factory set positions.
The option switches are located on the lower edge of the Line A and B circuit
boards, respectively, behind the auto answer buttons. The factory set position for
each switch is the ON position, which is in the direction of the card edge for
each line.
The option switch position numbers (1-8) are silkscreened on the circuit board.
Follow these position numbers rather than any which may appear on the
switches. The factory set positions (all ON except for S7-2 and S7-4 which are
off ) are correct for the typical application of receiving calls from standard
telephone sets or cellular phones. You may change the switch settings based
upon their individual descriptions on the following pages, or upon one of the
applications described.
The TEL-14 must be unplugged from the frame to access the option switches.
The TEL-14 may be removed and inserted with the frame powered. With the
exception of the normal/test mode switch and matrix identification switches,
which are not used on Line B, the Line A and Line B switch numbering is
identical. The TEL-14 will retain its telephone line settings while it is unplugged,
so it is important to plug it back into the same slot.