D-Link DI-1750 Reference Manual page 23

Command
framing crc4
framing(undo) or
framing no-crc4
Take the first command as an example:
Choose the item 13 of interface-parameter prompt, it will display:
(00)crc4
(01)no-crc4
Please Input the code of command to be excute(0-1): 0
Input 0，choose the item "crc4".
3. Configuring Line Code/Decode Format of E1 Interface
There are two formats of line code/decode supported by E1 interface: AMI and HDB3
Default setting is HDB3.
Command
line code ami
line code(undo) or
line code hdb3
Choose item 19 of interface-parameter prompt, it will prompt:
(00)ami
(01)hdb3
Please Input the code of command to be excute(0-1):
Choose 0，it will be set as ami format；
Choose 1，it will be set as hdb3 format.
4. Configuring Line Clock of E1 Interface
If E1 interface is operated as synchronous interface, two operation modes available for E1 that is of
DTE and DCE. It is need to choose line clock. While two Routers straight connected with E1 interfaces,
the two ports must be operated with DTE and DCE separately. While Router connects with Exchange
through E1 interface, DCE for Exchange and DTE for E1 interface of Router.
Default operation mode of E1 interface is DTE.
Command
clock internal
clock external
Choose item 5 of interface-parameter prompt, it will display:
(00)external
(01)internal
Please Input the code of command to be excute(0-1):
Choose 0, use internal synchronous signal of chip;
Choose 1，use synchronous signal of line.
Configure the frame checking of E1 interface as
4bytes CRC check.
Configure the frame checking of E1 interface as
unchecking.
Configure line code/decode format of E1 interface as AMI
Configure line code/decode format of E1 interface as
HDB3
use ami mode
use hdb3 mode
Configure operation mode of E1 interface as DCE that use internal
synchronous signal of chip.
Configure operation mode of E1 interface as DTE that use synchronous
signal of line.
external clock
internal clock
Model Name
Function
Function
Function
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