Switch SW1-1 through SW1-5
A detailed description of each switch (SW1-1 through SW1-5) setting
follows the summary table below.
Use Switches SW1-5 to set the DTE data rate.
SW1 SW2 SW3
SW4 SW5
Speed
ON
ON
ON
ON ON
64kbps
OFF
ON
ON
ON ON
128kbps
ON
OFF
ON
ON ON
192kbps
OFF
OFF
ON
ON ON
256kbps
ON
ON
OFF
ON ON
320kbps
OFF
ON
OFF
ON ON
384kbps
ON
OFF
OFF
ON ON
448kbps
OFF
OFF
OFF
ON ON
512kbps
ON
ON
ON
OFF ON
576kbps
OFF
ON
ON
OFF ON
640kbps
ON
OFF
ON
OFF ON
704kbps
OFF
OFF
ON
OFF ON
768kbps
ON
ON
OFF
OFF ON
832kbps
OFF
ON
OFF
OFF ON
896kbps
ON
OFF
OFF
OFF ON
960kbps
OFF
OFF
OFF
OFF ON
1024kbps
ON
ON
ON
ON OFF
1088kbps
OFF
ON
ON
ON OFF
1152kbps
ON
OFF
ON
ON OFF
1216kbps
OFF
OFF
ON
ON OFF
1280kbps
ON
ON
OFF
ON OFF
1344kbps
OFF
ON
OFF
ON OFF
1408kbps
ON
OFF
OFF
ON OFF
1472kbps
OFF
OFF
OFF
ON OFF
1536kbps
ON
ON
ON
OFF OFF
1600kbps
OFF
ON
ON
OFF OFF
1664kbps
5
ON
OFF
ON
OFF OFF
1728kbps
OFF
OFF
ON
OFF OFF
1792kbps
ON
ON
OFF
OFF OFF
1856kbps
OFF
ON
OFF
OFF OFF
1920kbps
ON
OFF
OFF
OFF OFF
1984kbps
OFF
OFF
OFF
OFF OFF
Clear Channel 2048kbps
NOTE: When the data rate is set to 2.048Mb/s, the unit is forced
into G.703 mode, and it transmits user data on all 32 time-lots.
There is no framing information; therefore, the CRC4 MF (SW2-2)
switch is ignored. In all other rate settings, the unit employs G.704
framing; TS0 is reserved for signaling.
SW1-6 and SW1-7 CLOCK MODES
Use Switches SW1-6 and SW1-7 to configure the 2701 for internal,
external, or receive recover clock mode.
Network Clock
Transmitter timing is derived using the received line
signal (received recovered) from the network.
Internal Clock
Transmitter timing is derived from an internal clock
source.
External Clock
Transmitter timing is derived from DTE terminal tim
ing.
SW1-8: Enable/Disable Loop Tests from DTE
Use Switch SW1-8 to allow Model 2701 to enter loopback tests when
the DTE raises the appropriate loop request pin.
S1-8
Setting
Off
Response to DTE Loopback Request Enabled
On
Response to DTE Loopback Request Disabled
6
SWITCH SET 1 SUMMARY TABLE
Position
Function
Factory Default
Selected Option
SW1-1
DTE Rate
OFF
SW1-2
DTE Rate
OFF
SW1-3
DTE Rate
OFF
SW1-4
DTE Rate
OFF
SW1-5
DTE Rate
OFF
SW1-6
Clock Mode
OFF
Receive Recovered
SW1-7
Clock Mode
OFF
Receive Recovered
SW1-8
TM from DTE
OFF
Enabled
2.048 Mbps
Clear
Channel
}
SW1-6 SW1-7
Clock Mode
On
On
Network (Recieved Recovered)
On
Off
Internal
Off
On
External
Off
Off
Network (Recieved Recovered)
