Connecting your telephone lines – IBM -4900 User Manual
Page 16
CONNECTING YOUR TELEPHONE LINES
Wherever you intend to locate each phone, have your local telephone company install as many tele-
phone lines and wall jacks as necessary to enable you to connect each telephone. If possible, have 2
two-line
14) wall jacks installed instead of 4 single-line (RJ I I)
wall jacks (see illustrations on pages I8
and
Each telephone must be connected to each telephone line in order for it to access every line in
the system.
I. If you have 4 single-line wall jacks, you will need to use a two line coupler (not included) to pro-
vide the required 2 two-line
14) telephone jack(s).
2. The two adapter coupler can be purchased in most electronic stores.
3. All lines must be connected to each extension in the same manner. Switching connectors or lines
to connectors will result in improper operation.
4. All extensions must be connected to [LINE I] for intercom, paging and transfer functions to oper-
ate.
USING THE DATA JACK
The jack located on the rear of the telephone labeled “DATA” is a convenience jack. It is useful for
connecting a FAX machine or PC when there is no telephone jack available for that device. The DATA
jack allows connection to Line 2 only. An installation using two
I I C telephone jacks results in Line I
and Line 3 being active (See diagram on page
In this case the DATA jack is not active and can not
be used.
NOTE:
Many of the advanced system features of the IBM-4900 require the use
of
line
Because of this it
is not recommended that electronic devices (modems, FAX machines, door bells, etc.)
Be connected to line
I.
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