•
Both exchange lines are configured for small call routeing mode
(SCRM). Depending on the system configuration mode, all extension
ports may be associated with the SCRM lines. Exchange lines are
selected as follows:
Systemphone
Press the appropriate line key or key
41
(for line
1)
or
42
(for line 2).
Approved (green spot) telephones
Press the telephone recall key or key
41
(for line
1)
or
42
(for line 2).
•
Forward Earth or Time Break recall is provided on the exchange line
ports. The maximum allowable installation resistance of the functional
earth is
50
n.
•
The current feed from the extension ports is in the range of 22 to 28ma.
The best overall performance of the system will be obtained by using
approved extension telephones of impedance class
A
•
Payphones are not suitable for connection to the 2+8.
•
The 2+8 is designed for
240V
ac
50Hz
mains supply.
•
The 2+8 control unit and Systemphones have been designed to work in
an office-type environment and with the following specific design
limitations:
- operating temperature
- storage temperature
- relative humidity
- main supply
- power consumption
TPU
1371
Issue
3 (4/91)
o·
to
4o·c
-20·
to
6o·c
<80%
240V
ac +
10% -5% 50Hz
lOOW
with a fully loaded system.
Statutory information
10-2
Summary of Contents for 2+8
Page 1: ...Installation and maintenance manual 2 8...
Page 2: ......
Page 36: ...Notes 10 2 Notes 10 3 TPU 1371Issue3 4 91...
Page 37: ...Notes TPU 1371Issue3 4 91 10 4...
