9
3.1.1 DIP Switches SW1 - SW8
The configuration switches on the DIP switch pack will allow you to
specify data rates, line framing and coding, DSO rate, clock mode and
Line Build Out (LBO). Factory default settings of all switches are
shown in the table below.
* In unframed mode, SW2.2 is used with SW2.1 to determine the
clocking mode. In framed modes (ESF or D4) only network and internal
clocking are available. In unframed mode, where the DTE data rate is
1.544 Mbps, a third clocking option is available-external clocking, in
which the CSU derives its transmit timing source from the DTE (See
Appendix D for external timing pin data).
SWITCH SETTING SUMMARY TABLE
1.536 Mbps
(DTE Rate)
Position
Function
Factory Default
Selected Option
SW1.8
Data Rate
On
SW1.7
Data Rate
On
SW1.6
Data Rate
Off
SW1.5 Data Rate
Off
SW1.4
Data Rate
Off
SW1.3
Starting Channel
Off
SW1.2
Starting Channel
Off
SW1.1
Starting Channel
Off
SW2.8
Starting Channel
Off
SW2.7
Starting Channel
Off
SW2.6
Line Build Out
Off
SW2.5
Line Build Out
Off
SW2.4
Line Code
Off
SW2.3
Frame
Off
SW2.2
DS0 Rate/Clock*
On
SW2.1
Clock
Off
Starting From
Channel 1
ESF
64 kbps
Network
B8ZS
0dB
Function
SW2.2
SW2.1
Clocking Mode
Don’t Care
Off
Network
Don’t Care
On
Internal
Don’t Care
Off
Network
Off
On
Internal
On
On
External
CLOCKING MODE
Framed Mode (ESF/D4)
Unframed Mode
10
Switches SW1.8, SW1.7, SW1.6, SW1.5 & SW1.4
These switches set the DTE date rate. Each setting represents
an nx56/nx64 setting. The chart below shows the switch settings and
the acheived DTE data rate.
MODEL 2711 DTE DATA RATE
SW1.8
SW1.7
SW1.6
SW1.5
SW1.4
DTE Data Rate
Off
Off
Off
Off
Off
1544 kbps (unframed)
Off
Off
Off
Off
On
56/64 kbps (n=1)
Off
Off
Off
On
Off
112/128 kbps (n=2)
Off
Off
Off
On
On
168/192 kbps (n=3)
Off
Off
On
Off
Off
224/256 kbps (n=4)
Off
Off
On
Off
On
280/320 kbps (n=5)
Off
Off
On
On
Off
336/384 kbps (n=6)
Off
Off
On
On
On
392/448 kbps (n=7)
Off
On
Off
Off
Off
448/512 kbps (n=8)
Off
On
Off
Off
On
504/576 kbps (n=9)
Off
On
Off
On
Off
560/640 kbps (n=10)
Off
On
Off
On
On
616/704 kbps (n=11)
Off
On
On
Off
Off
672/768 kbps (n=12)
Off
On
On
Off
On
728/832 kbps (n=13)
Off
On
On
On
Off
784/896 kbps (n=14)
Off
On
On
On
On
840/960 kbps (n=15)
On
Off
Off
Off
Off
896/1024 kbps (n=16)
On
Off
Off
Off
On
952/1088 kbps (n=17)
On
Off
Off
On
Off
1008/1152 kbps (n=18)
On
Off
Off
On
On
1064/1216 kbps (n=19)
On
Off
On
Off
Off
1120/1280 kbps (n=20)
On
Off
On
Off
On
1176/1344 kbps (n=21)
On
Off
On
On
Off
1232/1408 kbps (n=22)
On
Off
On
On
On
1288/1472 kbps (n=23)
On
On
Off
Off
Off
1344/1536 kbps (n=24)
