Clear-Com TEL-14 - Manual (Page 22)

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 - 8
headsets are used. However, if two TEL-14 lines were connected into the same
party line, it would be advantageous to set Receive Suppression Disable to the
OFF position. This prevents noise from one or more telephone lines from
interfering with intercom communication and improves the stability of the
connection. Refer to the “Party Line Dial-In Mode” section of this chapter. To
leave the telephone line audio connected when the distant party is not
speaking, set option switch S6-1 to ON. To mute the telephone line audio
when the distant party is not speaking, set option switch S6-1 to OFF. The
factory default setting is ON, causing Receive Suppression to be disabled.
Switch S6-2 Intercom Echo Cancellation:
Depending upon the system
configuration and room acoustics, audio communications may be improved
by turning off the automatic intercom echo cancellation. Refer to the
“Intercom-to-Intercom Mode” section of this chapter. Normally, however,
leaving the automatic echo cancellation turned ON results in the best
communications. To enable automatic intercom echo cancellation, set option
switch S6-2 to ON. To disable automatic intercom echo cancellation, set
option switch S6-2 to OFF. The factory default setting is ON, causing automatic
intercom echo cancellation to be enabled.
Switch S6-3 Telephone Echo Cancellation:
Depending upon the system
configuration and telephone line conditions, audio communications may be
improved by turning off the automatic telephone echo cancellation. Refer to the
“Intercom-to-Intercom Mode” section of this chapter. Normally, however,
leaving the automatic echo cancellation urned ON results in the best
communications. To enable automatic telephone echo cancellation, set option
switch S6-3 to ON. To disable automatic telephone echo cancellation, set option
switch S6-3 to OFF. The factory default setting is ON, causing automatic
telephone echo cancellation to be enabled.
Switch S6-4 DTMF Dial Guard Time: At the start of a call when the TEL-14
goes off hook the Echo Cancellation is frozen and the Receive Gain is reduced to
allow distortion free DTMF dialling. With S6-4 set to its factory default
position ON the DTMF Dial Guard Time is 4 seconds. With the S6-4 set to the
optional position OFF the DTMF Dial Guard Time is extended to 10.2 seconds.
Switch S6-5 Software Compatibility: The Software Compatibility switch enables
the TEL-14 to be backwards-compatible with Matrix Plus II software, revisions
10 and 11. When the TEL-14 is shipped as part of a system, this switch is set at
the factory to match that system's software revision. If the TEL-14 is shipped
individually, this switch is set to ON (compatible with Matrix Plus II, revisions
12 or higher, or with Matrix Plus 3). If the TEL-14 is to be installed in a Matrix
Plus II system running revisions 10 or 11, you must set this switch to OFF.
Switch S6-6 Matrix Control: Note: This switch is normally only used in MatrixPlus
II intercom systems using revision 11 software or earlier. In later releases,this
function is controlled by the "Prevent Stations From Calling Out" option in the
"Configure - Local Preferences" screen for the telephone port.
When Matrix Control is enabled, a telephone call can be initiated by any
intercom station that has a TEL-14 port label assigned to a selector key. Matrix
Control enables the station to activate talk paths to the TEL-14, which will cause