Sim2000-24 Parameters; Line Code - Net to Net Technologies SIM2000 User Manual

3.3.2 Launch a MIB Browser
Launch a MIB Browser program on your PC. If you have not yet downloaded the MIBs to your PC
or local network, you can obtain the Net to Net enterprise MIBs from
ftp://ftp.nettonet.com/download/mibs
http://www.ietf.org/rfc.html
into your MIB Browser; see your MIB Browser user manual for further instruction.
Once the MIBs have been downloaded, you will be able to make configuration changes to the SIM2000-
24, and any other interface modules installed in the IP DSLAM, as desired. For more detailed
information regarding SIM2000-24 parameters and configuration, refer to Section 4.0 below and /or
the CLI and SNMP Management User Guide.

4.0 SIM2000-24 PARAMETERS

Parameters common to all interface module models are defined in both the NMS Management User Guide
and the CLI and SNMP Management User Guide. Parameters specific to the SIM2000-24 are outlined below.

4.1 Line Code

Line code configuration for the SIM2000-24 applies to all ports; individual ports cannot be configured
with different line codes.
4.1.1 TC/PAM (G.SHDSL) - DEFAULT
Transmission Convergence/Pulse Amplitude Modulation (TC/PAM) line code is a sixteen-level
PAM technique which incorporates advanced Trellis code, precoding, spectral shaping,
equalization circuits and forward error correction. Otherwise known as G.SHDSL.
4.1.2 CAP
Carrierless Amplitude and Phase (CAP) line code modulates transmit and receive signals into two
wide-frequency bands that can pass through a filter without being attenuated.
4.1.3 2B1Q
Two Binary, One Quaternary (2B1Q) line code is a four-level Pulse Amplitude Modulation (PAM)
technique which reduces the signaling rate to half of the bit rate, thereby doubling transmission
efficiency.
4.2 Speed
There are nine bandwidth options for SIM2000-24 SDSL connections; default is 272 kbps. Distance
capabilities vary, dependent upon the type of line code being utilized. Distances listed below assume
the use of 26 American Wire Gauge (AWG) cable; connections made with cable of a greater gauge (e.g.,
24 AWG) will link up at greater distances. The units may not link up if the cable is in poor condition or if
the cable distance is greater than a particular bandwidth will support.
Remote SDSL subscriber units determine line speed through their communication with the SIM2000-
24.
210-0000049 rev 05
and the supported portions of MIB-II from RFC 1213 at
. Once these have been downloaded, you will need to compile them