8335-A2-GB20-A0
March 2005
B-1
B
Connector Pin Assignments
Model 8820 BLC Telco Connector Pinouts
The Telco 50-pin connectors on the back of the BLC (numbered 1–18) provide the
2-wire loop interface from each DSL port to either the POTS splitter shelf or, if the
loop is not being shared with POTS, then to the Main Distribution Frame (MDF).
The following table lists the pin assignments for each of these interfaces.
Port
Pins
Port
Pins
Port
Pins
Port
Pins
Port
Pins
1
1, 26
6
6, 31
11
11, 36
16
16, 41
21
21, 46
2
2, 27
7
7, 32
12
12, 37
17
17, 42
22
22, 47
3
3, 28
8
8, 33
13
13, 38
18
18, 43
23
23, 48
4
4, 29
9
9, 34
14
14, 39
19
19, 44
24
24, 49
5
5, 30
10
10, 35
15
15, 40
20
20, 45
25
Not
used
00-16714
Pin
Number 50
Pin
Number 1
