MH88615
TIP
RING
NC
DCRI
LPGND
VBat
NC
VDD
AGND
VEE
RC
PD
NC
SHK
VR
VRef
CAP
VX
NC
RV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Advance Information
Figure 2 - Pin Description
Pin Description
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Name
TIP
RING
NC
DCRI
LPGND
VBat
NC
VDD
AGND
VEE
RC
PD
NC
SHK
VR
VRef
CAP
Description
Tip Lead.
Connects to the “Tip” lead of subscriber line.
Ring Lead.
Connects to the “Ring” lead of subsriber line.
No Connection.
This pin may be used for internal connections.
DC Ringing Voltage Input.
A continuous 120 Vdc is applied to this pin. This voltage is the
positive supply rail for the internal ringing amplifier for subscriber line.
Battery Ground.
V
Bat
return path for subscriber line. Connects to the systems’s energy
dumping ground.
Battery Voltage.
Battery supply feed for subscriber line. Typically -48Vdc is applied to this
pin.
No Connection.
This pin may be used for internal connections.
Positive Supply Voltage.
+5V dc supply rail.
Analogue Ground.
V
DD
and V
EE
return path.
Negative Supply Voltage.
-5V dc supply rail.
Ringing Control.
This input enables the ringing voltage feed to Tip and Ring for subscriber
line.
Power Denial.
A logic high will isolate the battery voltage for Tip and Ring.
No Connection.
This pin may be used for internal connections.
Switch Hook Detect.
A logic high indicates when subscriber line has gone off-hook.
Receive Signal.
This is the 4 wire analogue signal received at subscriber’s set.
Reference Voltage.
A dc reference voltage is applied to this pin to set the constant current
feed to subscriber line. This pin may also be grounded for normal 25mA loop current.
Ring Trip Filter Capacitor.
A capacitor is normally connected from this pin to ground and
filters out low frequency ringing signals, preventing false off-hook conditions.
Transmit Signal.
This is the 4 wire analogue signal transmitted from subscriber’s set.
No Connection.
This pin may be used for internal connections.
Ringing Voltage.
1.5 Vrms signal is injected to this pin.
18
19
20
VX
NC
RV
2-140
MITEL [ MITEL NETWORKS CORPORATION ]
