Verilink DIU 2130 (880-503297-001) Product Manual - Manual (Page 75)

56K NMS Option Overview
Verilink 6-15
V.54 Loopback This loopback meets the T1.403 standard which is similar to the
CCITT V.54 standard. It uses the same polynomial as the V.54
loopback to generate the loop-up and loop-down codes:
Verilink
Proprietary In-
band Loopback
(Verilink proprietary in-band loopback is not useful in DDS mode.)
This loopback includes the following:
loop-down Inverted 1-in-3
loop-up Inverted 1-in-5
Local DTE
Loopback
The local DTE loopback is supported in ASCII user interface and
AM2000. It can be activated/enabled by the ASCII user interface,
AM2000, or the LL lead. This loopback is bidirectional.
Remote RL Lead
Loopback
You can activate/enable a remote loopback by the ASCII user
interface, AM2000, or the RL lead. This loopback is bidirectional.
Loop-back Mode
Configuration
Options
Several parameters can be specified for the operation of loop-
backs. These parameters are located in the AM2000 DDS Loop
Options screen. (See Figure 4.) You can display them by pressing
the F8 key when the cursor is in the Loop field in the DIU 2130
configuration screen (See Figure 2). The DDS Loop Options screen
is used to configure the loopback options. Each port can be
configured independently.
The following fields are available:
Figure 4 AM2000 Example Display of Available DDS Loopback Definition
Options
Loop on received DDS code
Selects the DDS code on which the DIU213 0 port will
activate its bidirectional loopback. Choices include:
• DSU
• OCU
• V.54
• Channel
Select loop type on RL lead
1 x
4 –
x
7 –
+ +