6, figure 5). Other pins are not assigned. It is not necessary to recognize
polarity of the connection.
Table 6
Pin
Е1 circuit
1
R (Rx Tip)
2
Receive – (Rx Ring)
4
Tr (Tx Tip)
5
Transmit – (Tx Ring)
2.5.2 Configuring Е1 interface
In the DIP switches setup mode (SET4 is OFF) the E1 port always has the
following fixed settings:
•
Long-Haul mode
•
HDB3 line coding
•
CRC4 and CAS superframes are disabled
The RATE dial defines the DSL interface rate and the number of mapped E1
timeslots, as shown in the Table 7. When possible, unframed mode is used
(RATE is “9”, 2048 kbps).
Table 7
Rate
Timeslots
Rate
Timeslots
0
Not used
8
1-28
1
1-3
9
Unframed
2
1-4
A
Not used
3
1-8
B
Not used
4
1-12
C
Not used
5
1-16
D
Not used
6
1-20
E
Not used
7
1-24
F
Not used
18
