Clear-Com HX System Frames - Manual (Page 63)

Figure 24: RJ-11 to DB-9 Adaptor for TEL-14 Interfaces
Note:
The TEL-14 interface works with telephone company central office (CO) lines. Analog panel
lines from some in-house PABXs are not compatible.
Using series-connected telephone sets with the TEL-14
Although it is possible to use a parallel-connected telephone set to originate calls, it is
preferable to use a series-connected telephone set with the TEL-14. This prevents the
impedance of the telephone set from disturbing the telephone line impedance recognized by
the TEL-14.
It will also allow the TEL-14 to automatically disconnect the telephone when it comes “off-
hook.” A standard telephone may be installed in series with the TEL-14 by connecting it to
pins 1 and 6 of the RJ-11 jack. If telephones must be connected in parallel with the
telephone line(s) during the TEL-14’s automatic nulling process, all additional standard
telephones must be “on-hook”.
Using relay contacts with the TEL-14 interface
A pair of relay contacts for each telephone line rated at 2A at 24 VAC is available on the
DB-9 or the RJ-11 of the adapter. This pair of contacts is normally open when the line is “on-
hook,” and closes when the interface goes “off-hook”.
These contacts are not connected to any other circuitry inside the interface, and can be used
to energize a line-in-use indicator light on a standard multiline phone set, or for any other
low-power application.
DB-9 to TEL-14
Clear-Com RJ-11 to DB-9F
adapter
Line
Phone ( Blue )
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
Relay ( Yellow )
Line ( Gray )
Line ( Red )
Relay (Black)
Phone ( Gray )
Phone
Line
Relay
Relay
Phone
RJ-11 to telephone
line
63 Eclipse HX Matrix Frame Installation Guide