RAD Data Communications ASMi-52 Installation And Operation Manual - Chapter 1

Overview 1-1 

Chapter 1 

Introduction 

1.1 Overview 

ASMi-52 is an SHDSL modem that operates in full duplex over 2/4-wire lines and 

offers a cost-effective solution for delivering digital data to customer premises over 

existing copper cables. ASMi-52 handles multiple data rates in the range of 64–

4608 kbps. The unit is available with a single data port or as a multiplexer with 

two data ports. The modem supports X.21, V.35, RS-530, E1 and T1 interfaces. In 

addition, ASMi-52 may contain an Ethernet/Fast Ethernet bridge with VLAN 

support (via management LAN port), or an IP router (IR-IP). 

ASMi-52 uses TC-PAM coding and complies with the ITU-T G.991.2 requirements, 

see page 

1-7

. 

Certain multiplexer application combinations are possible. See Table 1-4 for the 

multiplexer applications. 

Versions 

DTE Interface 

ASMi-52 supports the following DTE interfaces: 

•  X.21 

•  V.35 

•  RS-530 

•  E1, as per G.704 

•  T1 

•  Ethernet/Fast Ethernet bridge with VLAN support (combined with management 

LAN port) 

•  IR-IP (IP router). 

The following combinations of interfaces can be multiplexed: 

•  V.35 + LAN 

•  E1 + LAN 

•  E1 + serial port (V.35, X.21, RS-530) 

Line Interface 

•  ASMi-52 for operation over a 2-wire line 

•  ASMi-52 for operation over a 4-wire line.