G.703/G.704 NTU W/V35
13
2.3.24 S
WITCH
SW2-4: R
EMOTE
D
IGITAL
L
OOPBACK
T
YPE
The user can set this switch to select the type of remote loop that will be initiated
by the MT335A. If set to V.54, the MT335A will initiate a V.54 loop when
Remote Loop is selected by the front panel switches. If set to CSU, the MT335A
will initiate a CSU loop when Remote Loop is selected by the front panel
switches.
2.3.25 S
WITCH
SW2-5 F
RONT
P
ANEL
S
WITCHES
As the Front Panel Switches may be inadvertently toggled, or in the event that the
end-user may not need to use the switches, the installer may disable the front
panel switches. Set Switch S2-5 to determine whether the front-panel toggle
switches are active or inactive.
2.3.26 S
WITCH
SW2-6: V.54 R
ESPONSE
D
ISABLED
(
DEFAULT
)
V.54 Response is a special in-band loopback facility that sends a pseudo-random
pattern over the data stream. This is the only loopback that the unit can initiate.
This is useful for campus applications when you need to put a remote unit in
loopback. The unit responds to the V.54 loopback command, and the whole pro-
cess takes only a few seconds to complete. When V.54 Loopback is disabled, the
unit will not be able to send or respond to V.54 loopback commands. The dura-
tion of the loopback is limited by the loopback timeout setting.
S2-4
RDL Type
Off
Initiate a V.54 RDL loop when selected
On
Initiate a CSU loopback when selected
SW2-5
Option
Off
Front Panel Switches Enabled
On
Front Panel Switches Disabled
SW2-6
Option
Off
V.54 Response Enabled
On
V.54 Response Disabled
