9
10
3.1.1 DIP Switches SW1 and SW2
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 (1.544 Mbps), SW2.2 is used with SW2.1 to
determine the clocking mode. In framed modes (ESF or D4) only net-
work and internal clocking are available. In unframed mode, where the
DTE data rate is 1.544 Mbps, a third clocking option is available-exter-
nal clocking, in which the CSU derives its transmit timing source from
the DTE (See Appendix D for external timing pin data).
Switches SW1.8, SW1.7, SW1.6, SW1.5 & SW1.4: DTE Data Rate
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.
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 Coding
Off
SW2.3
Line Framing
Off
SW2.2
DS0 Rate/Clock*
On
SW2.1
Clock Mode
Off
Contiguous
Starting From
Channel 1
ESF(ANSI T1.403)
64 kbps
Network
B8ZS
0dB
Function
SW2.2
SW2.1
Clock Mode
Don’t Care
Off
Network
Don’t Care
On
Internal
Don’t Care
Off
Network
Off
On
Internal
On
On
External
CLOCK MODE
Framed Mode (ESF/D4)
Unframed Mode
MODEL 2710A 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)
Note:
1. SW2.2 is used to set the DS0 rate to 56 kbps or 64 kbps.
2. For unframned mode (1544 kbps), set SW1.8, SW1.7,
SW1.6, SW1.5 & SW1.4 to OFF
