Owner manual

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)