jotron WP 900 Manual Del Usuario página 55

Installation Guide
PBX Interface T942PX
External voltage 12, 24, or 48 Vdc
PBX M signal in
Audio in/out (a and b line, 2-wire)
Audio out (a and b line, 4-wire)
GND (register recall)
Audio in (4-wire)
PBX E signal out
PBX E signal out, inverted
PBX E signal in
Remote start 1 and 2 are CMOS inputs.
The inputs are activated when grounded, i.e.
when contacts close a paging is generated
External
Inst. Audio line
voltage
alt. screw 4, 5
screw 1, 2
1 trunk line
Yes, 12 V
2 trunk line Yes, 24 V
trunk line Yes, 48 V
3
extension No
4
E & M signalling
5
according to ESPA
Standard Interface
Recommendation 4.4.3
NC = Not connected
Installation alternatives 1–4 are not polarized.
For installation alternative 5, connections to
the PBX depend on the type of exchange.
4
J05
1 Ext –
2 Ext +
3 M
4 a
5 b
6 EARTH
7 4W
8 E & M
9
10 E-Relay
11
12
J08
1 Remote paging 1
2 Remote paging 2
3 GND
SW02
S06 S09 S10
section 1
2-3, 4-5 1-2 1-2 OFF
2-3, 4-5 NC OFF
1-2
2-3, 4-5 NC NC OFF
1-2, 3-4 NC NC ON
3-4 NC NC OFF
9. Connection of PBX, External Power (if
necessary), and Remote Paging
Connect external wiring to screw connector J05
as shown in the drawing at left:
1. Connect audio line to J05-4 and 5.
(Audio out for 4-wire connection)
2. If the register recall signal (method 2 under
point 15) is used, connect the telephone
ground to screw 6.
3. If a 4-wire speech/audio line is used, the second
twisted pair is connected to J05-7 and 8.
(See point 13.) (Audio in, T941SM is required)
4. If external power is needed, connect it to
screws 1 and 2. Observe polarity!
5. If E & M signalling is used make connections
to J05-2, 3, 9, 10 and 11.
6. Remote start of pre-programmable personal
paging 1 and 2 are connected to J08-1 and 3,
and J08 2 and 3, respectively.
Selection of Installation Alternatives
The table at left is read horizontally and shows
five installation alternatives for connection to a
PBX:
S06, S09, S10, and SW02 (section 1) are used to
select the desired installation alternative. SW02 is
an ordinary toggle switch. S06, S09, and S10 are
special connectors and the pins on these connec-
tors are jumpered as required according to the
table by using special jumper plugs.
External 12 Vdc supply voltage can be taken from
J03 by connecting J03-1 to J05-2 and J03-2 to
J05-1. This is used only when a telephone that
operates on 12 Vdc is connected directly to the
T942PX.
The following example is for installation
alternative 2:
• Jumper S06 pins 2-3 and 4-5 with special
jumper plugs.
• Jumper S09 pins 1-2 with special jumper plug.
• Set section 1 of SW02 to OFF.
No jumper plug on S10.
• Connect external supply voltage, 24 Vdc to
J05-1 (negative) and J05-2 (positive).
Handook page
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TD 91012GB
1996 11 06