To configure ASMI 54L SHDSL ports, there are only 2 steps that u should do :
1. Select Main Menu>Configuration>Physical Layer>SHDSL>Line
2. Set one device to STU = central and leave the other as STU = remote
Connection Data
For the wire, you could use whether it ethernet connector, shdsl connector or E1 connector.
A. Ethernet Connector
The 10/100Base Ethernet electrical interface is an 8-pin RJ-45 connector, wired accordance with this below :
Pin Function
1 Rx+
2 Rx-
3 Tx+
4 not used
5 not used
6 Tx-
7 not used
8 not used
Tx+/Tx- and Rx+/Rx- may be automatically crossed if MDI-X is enabled.
B. SHDSL Connector
The SHDSL electrical interface is an 8-pin RJ-45 connector, wired in accordance with this below :
Pin Function
1 NC
2 NC
3 Loop 2
4 Loop 1
5 Loop 1
6 Loop 2
7 NC
8 NC
Note : Do not connect wires to the NC pins
Loop 1 refers to line 1 and Loop 2 refers to line 2
Note : For 2W option, only Loop 1 pins are in use
C. E1 Interface Connector
The balanced E1 interface terminates in RJ-45 connector. Table below lists the balanced connector pin assignment.
Pin Function
1,2 Transmit (output)
4,5 Receive (input)
7 CPU ID for unbalanced interface detection
8 Earth GND
Note : It is recommended to use 4-wire cables (pin number 1,2,4 & 5) only for E1 connections. If 8-wire cable is used, verify that pin is not connected on the equipment side.
For unbalanced E1, use the adaptor cable CBL-RJ45/2 BNC/E1.
D. Control Connector
The control terminal interfaces terminate in a V.24/RS-232 9-pin- D-Type female DCE connector . This table below lists the control conncetor pin assignments.
Pin Function Direction
2 Rxd (RD) OUT
3 Txd (TD) IN
5 Ground GND
Study Case
I have some trouble with my existing back to back modem. Its only could provide 2 Mbps data rate. So, i decided to change the modem with asmi 54L. Here are my existing configuration :
In my lab, i use laptop to replace that router. Then boom the traffic with tfgen.exe and use DU Meter to monitor the bandwidth. Here are my result, it proves tha asmi 54L could use up to 4 Mbps using 2Wire option.
Reference : ASMI 54L Manual Book