Specifications

ASMi-52 Installation and Operation Manual Chapter 1 Introduction
Overview 1-3
Line Interface
ASMi-52 extends the range of data transmission over 2/4-wire lines up to 7.0 km
(4.3 miles), by employing SHDSL TC-PAM technology. ASMi-52 operation
complies with the requirements of the ITU-T G.991.2 standard. 4-wire ASMi-52
units can be configured to operate over 4-wire or 2-wire lines.
Table 1-1 lists typical ASMi-52 ranges over 2/4-wire 26 AWG line.
Table 1-1. Typical Ranges (26 AWG)
Data Rate 2-wire 4-wire
[kbps] [km] [miles] [km] [miles]
64
7.5 4.6
– –
128
7.0 4.3 7.1 4.4
256
6.7 4.1 6.8 4.2
384
6.5 4.0 6.7 4.1
512
6.3 3.9 6.6 4.1
1024
5.3 3.3 6.0 3.7
1536
5.0 3.1 5.6 3.5
2048
4.5 2.8 4.7 2.9
2304
4.2 2.6 4.5 2.8
4096
– – 3.7 2.3
4608
– – 3.0 1.8
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).
In the ASMi-52 units with the serial, E1 or T1 DTE interface, the 10/100BaseT port
serves for the management only. When ASMi-52 is ordered only with the
10/100BaseT port, it can be used for transfer of the user and management data.
E1 unbalanced interface is provided via an adapter cable (CBL-RJ45/2BNC/E1). The
impedance conversion (120
Ω to 75 Ω ) is performed by ASMi-52 automatically, once
the adapter cable connection is detected.
Note