MH88632B
Preliminary Information
TIP
RING
XLA
XLB
XLC
XLD
IC
GRD
IC
IC
RGND
VRLY
LRD
BRD
LRC
BRC
GRC
AGND
NATT
N1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
N2
Z900
Z1
Z2
TX
RX
GTX0
GTX1
GRX0
GRX1
IC
Z600
NS
TG
RL
RV
FL
RG
VEE
VCC
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
Figure 2 - Pin Connections
Pin Description
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Name
TIP
RING
XLA
XLB
XLC
XLD
IC
GRD
IC
IC
RGND
VRLY
LRD
BRD
LRC
Description
Tip Lead.
Connects to the Tip lead of a telephone line usually via an external protection
circuit.
Ring Lead.
Connects to the Ring lead of a telephone line usually via an external protection
circuit.
Loop Relay Contact A.
Connects to XLB through relay contacts (K1A) when the relay is
energized.
Loop Relay Contact B.
Connects to XLA through relay contacts (K1A) when the relay is
energized.
Loop Relay Contact C.
Connects to XLD through relay contacts (K1B) when the relay is
energized.
Loop Relay Contact D.
Connects to XLC through relay contacts (K1B) when the relay is
energized.
Internal Connection.
No connection should be made to this pin.
Ground Ring Lead Relay Drive (Output).
Connects to the Ground Ring Lead Relay coil
(K3) and is controlled by GRC.
Internal Connection.
No connection should be made to this pin.
Internal Connection.
No connection should be made to this pin.
Relay Ground.
Return path for relay supply voltage.
Relay Positive Supply Voltage.
Normally +5V. Connects to all relay coils and the relay
supply voltage.
Loop Relay Drive (Output).
Connects to the Loop Relay coil (K1) and is controlled by
LRC.
Bias Relay Drive (Output).
Connects to the Bias Relay coil (K2) and is controlled by BRC.
Loop Relay Control (Input).
A logic 1 activates LRD. The Loop Relay (K1) is used for
placing the Line Termination across Tip and Ring.
2-240
MITEL [ MITEL NETWORKS CORPORATION ]
