MH88634B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Advance Information
TIP
RING
XLA
XLD
XLB
XLC
IC
IC
IC
SHK
RX
VEE
TX
RV
FL
RL
VCC
AGND
LRC
VRLY
LRD
Figure 2 - Pin Connections
Pin Description
Pin #
1
2
3
4
5
6
7-9
10
Name
TIP
RING
XLA
XLD
XLB
XLC
IC
SHK
Description
Tip Lead.
Connects to the "Tip" lead of a Telephone Line.
Ring Lead.
Connects to the "Ring" lead of a Telephone Line.
Loop Relay Contact A.
Connects to XLB through the Loop relay (K1) contacts when the
relay is activated.
Loop Relay Contact D.
Connects to XLC through the loop relay (K1) contacts, when the
relay is activated.
Loop Relay Contact B.
Connects to XLA through the loop relay (K1) contacts, when the
relay is activated.
Loop Relay Contact C.
Connects to XLD through the loop relay (K1) contacts, when the
relay is activated.
Internal Connection.
No connection should be made to this pin.
Switch Hook (Output).
A logic 0 indicates the presence of forward or reverse battery
voltage when LRC is logic 0 and the presence of forward or reverse loop current when LRC
is logic 1.
Receive (Input).
4-Wire ground (AGND) referenced analog input.
Negative Supply Voltage.
-5V DC
Transmit (Output).
4-Wire ground (AGND) referenced analog output.
Ringing Voltage Detect (Output).
A logic low indicates that ringing voltage is across the Tip
and Ring leads.
Forward Loop Detect (Output).
In the on-hook state, a logic 0 output indicates that
forward loop battery is present. In the off-hook state, a logic 0 indicates that forward loop
current is present.
Reverse Loop Detect (Output).
In the on-hook state, a logic 0 output indicates that
reverse loop battery is present. In the off-hook state, a logic 0 output indicates that reverse
loop current is present.
Positive Supply Voltage.
+5V DC
11
12
13
14
15
RX
VEE
TX
RV
FL
16
RL
17
VCC
2-266
MITEL [ MITEL NETWORKS CORPORATION ]
