15
AlphaCom XE - Installation, Configuration & Operation
A100K10805
ATLB - Telephone Line Board
2.2.10
The ATLB board contains circuitry for connecting 6 two-wire DTMF
telephones used as AlphaCom subscribers. The board also provides
one measurement channel for voice switching control.
They plug into any positions 1-23 in the XE20 and XE26 servers and
positions 1-6 in the XE7 substituting ASLT boards.
A hot-line function can be activated: a pre-programmed number is then
dialed when the handset is lifted. Another number is dialed when the
handset is replaced.
The board provides 6 remote control software controlled outputs.
The line monitoring option requires a 10K resistor across the line at the
telephone end. The monitoring reports errors on all subscriber lines. If
the handset is left off-hook for 1 hour (programmable timer) a line error
is reported.
There are jumpers on the board to select options. The default settings
should normally not be changed.
● Line feed voltage
48 V
Default, normally used
-
24 V
Short distance or special 24 V phones
-
Ringing voltage for each station
●
Internal
Default, for indoor or office environment
-
External
For outdoor or industrial environments
-
or for many telephones on one line
Line balance
●
Complex
Default, normal in most countries
-
600 ohm
Best in some countries,
-
may reduce feedback in handset
AlphaCom XE20/XE26
Telephones and control outputs are connected to a connection board
mounted on the server connection field.
Telephone connection boards with transient protection (100 9930 202)
and subscriber connection cables with filter board (100 9501 031) must
be purchased separately.
Telephones may also be connected to an LCM board (100 9950 100).
This board is likely to be installed in XE servers with DTMF telephones
due to the expanded capacity. The default DIP switch settings should
normally not be changed.
The first and last three connector pairs on each board shall not be used.
AlphaCom XE7
All telephones are connected by means of pluggable screw terminals on
the server backplane.
The ALTB board can be placed in any board position 1-6. The example
drawing shows an ATLB board in position 2. If possible, avoid using
boards in position 1 as connection points 5 and 6 are used for program
input by default.
Further information on the ATLB board is found in datasheet
A100K10237.
ATLB-12 - Telephone Line Board
2.2.11
ATLB-12 has the same functions as ATLB except that it has 12 two-wire
DTMF telephone lines. ATLB-12 does not support line monitoring.
The 6 first telephones get the physical number according to the card’s
physical slot and the last 6 telephones have numbers with an offset of
+276 to the 6 first physical numbers.
Line feed
voltage
Line
Balance
Ringing
voltage
24 V
48 V
600 Ohm
Complex
External
Internal
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
RING1
TIP1
RING2
TIP2
RING3
TIP3
RING4
TIP4
RING5
TIP5
RING6
TIP6
G123456G
RCO
1
2
3
4
5
6
CONNECTION BOARD
TX RX G
MRBD
1 . . . . 6
Relay board
1A
2A
3A
4A
5A
6A
7A
1B
2B
3B
4B
5B
6B
7B
1C
2C
3C
4C
5C
6C
7C
1D
2D
3D
4D
5D
6D
7D
1
R
EL
AY
O
UT
PU
TS
6
1K+
1K-
2K+
2K-
3K+
3K-
4K+
4K-
5K+
5K-
6K+
6K-
S6
S5
S4
S3
S2
S1
2
4
6
3
5
1
1
RCO 6
RCO 5
RCO 3
RCO 4
RCO 2
RCO 1
Physical no.
Line board 1
2
4V
Po
te
n
Fr
ee
12
7
8
9
1 0
11
A
A
A
A
B
B
B
B
C
C
C
C
D
D
D
D
NC
NC
NC
NC
7
9
11
8
10
12
Phys. no.