D-Link DI-1750 Reference Manual page 27

4. Configure Unframe E1 interface clock mode
When Unframe E1 is used as synchronization interface, there are two work modes: "DTE" and "DCE",
you need to choose line clock also. When Unframe E1 interfaces of two routers are directly connected ,
it is necessary to let two interfaces work at "DTE" OR "DCE"; when Unframe E1 of a router is connected
into a switch ,because switch is a "DCE" device, Unframe E1 of a router need to work
at "DTE" mode.
The default work mode of UNFRAME E1 is DTE.
Command
Clock interval
Clock external
5. configure Unframe E1 interface back-loop transportation mode
In remote back-loop transportation mode, UNFRAME E1 will send back message from the tunnel from
which it receives the message.
Loopback local
Loopback remote
No loop
6. disabled Unframe E1 interface line
You can disabled some UNFRAME E1. Just make all lines state on interface is "down".
shutdown
No shutdown
For an example:
Current Status:_controller_E1_2/0 Current Directory: config
(18)shutdown
Please Input the code of command to be execute(0-20):18
Key Word:
U(undo) Q(quit)
(00)<cr>
Please Input the code of command to be execute(0-0): 00
Will you execute it? [Y]:y
Please Input the code of command to be execute(0-0): u
Will you execute it? [Y]:y
7. configure Unframe E1 interface parameter
Unframe E1 is always in unframe mode and can't exit the mode,Its interface is also unchanging. The
logic characters of the unframe E1 interface are the same as synchronization. Its name is
" serial<slot>/<group>:<channel-group>", and <slot> and <group> are consistent with <slot> and
<group> in "controller E1 <slot>/<group>".
You can encapsulate PPP, frame relay, HDLC , SDLC ,X.25 and etc.line layer protocols on interface.
for an example:
[DEFAULT@Router /config/]#int
Key Word:
Configure Unframe E1 to "DCE", use synchronization in chip
Configure Unframe E1 to "DTE", use line synchronism
Command
Command
shutdown a link
Model Name
Purpose
Purpose
Configure Unframe E1 to local loopback mode
Configure Unframe E1 to remote loopback
mode
Cancel loopback setting
Purpose
Disabled Unframe E1 interface line
Resume Unframe E1 interface line
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