3Com Router Module Guide
ADSL card
ADSL card
ADSL card
ADSL card
Figure 3-54 Connecting the ROUTER 1-PORT ADSL OVER POTS MIM
3.12 ROUTER 2-PORT ADSL OVER POTS MIM
3.12.1 Introduction
ROUTER 2-PORT ADSL OVER POTS MIM, the 2-port ADSL over PSTN interface
card, allows a LAN subscriber to connect to the digital subscriber's loop access
multiplexer (DSLAM) at the central office over a regular analog subscriber line or
telephone line. Thus, the subscriber can access the ATM/IP backbone or the Internet
to enjoy services such as high-speed data communication and video on demand
(VoD).
ADSL transmits data in the high frequency band above 26 kHz. Therefore, it can
provide services without interfering with the voice service being provided in the low
frequency band (0 to 4 kHz) on the same line. It provides downlink rates in the range
32 kbps to 8 Mbps and uplink rates in the range 32 kbps to 1 Mbps.
The ADSL interface cards provide these functions:
Manual ADSL line activation and deactivation, supporting SAR loopback for
convenient fault isolation.
Interface standards of G. DMT, G. Lite, and T1.413, auto-sensing.
Trellis coding (except for G. Lite) on ADSL interfaces, enhancing stability of ADSL
connections.
3.12.2 Interface Attributes
The following table describes the interface attributes of the ROUTER 2-PORT ADSL
OVER POTS MIM.
Table 3-30 Interface attributes of the ROUTER 2-PORT ADSL OVER POTS MIM
Connector
RJ11 interface
RJ11 interface
RJ11 interface
RJ11 interface
Splitter
Splitter
Modem interface
Modem interface
Modem interface
Modem interface
Attribute
RJ-11
Chapter 3 Multifunctional Interface Modules
Phone port
Phone port
Phone port
Phone port
PSTN
PSTN
Line port
Line port
Line port
Line port
3-50
ROUTER 2-PORT ADSL
OVER POTS MIM
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