22
G.703 CODIRECTIONAL CONVERTER
Table 3-1. Setting Jumpers
Jumper
Factory
Possible
Identity
Setting
Position Function
GND
Connect Connect: Protective ground connected to
signal ground.
Disconn
Disconn
Disconn: Protective ground disconnected
from signal ground.
TC G.703 LBT
LBT
The Tx-pair timing is the recovered clock
from the CCITT G.703 Rx pair.
EXT
The Tx-pair and transmit timing are from
the RS-422/V.35 external source.
INT
The Tx-pair and transmit timing are from
the internal source.
LBT
DTE
DTE
Connection to DTE, with transmit and
receive timing derived from the unit’s
recovered clock.
DCE
Connection to DCE, while both the DCE
and the unit operate with external
transmit timing.
DCE 21
Connection to X.21 DCE. The unit’s
transmit and receive timing are derived
from the DCE.
BAUD
64
64
Data rate is 64 kbps.
RATE
56
Data rate is 56 kbps.
48
Data rate is 48 kbps.
V.54 DLY ON
ON
V.54 delay is active, preventing mutiple
loopback on tail-end circuits.
OFF
V.54 delay is not active.
