3010E/3020E/3040E G.SHDSL.bis EFM Bridge Modem User’s Manual Ver:A2
70
4.4.1.3
Annex
There are two types of SHDSL.bis Annex type: Annex-AF, and Annex-BG.
4.4.1.4
TCPAM
There are two TCPAM modes for SHDSL.Bis: TCPAM-16 and TCPAM-32. You also can select Auto mode.
4.4.1.5
Maximum main rate
You can setup the SHDSL.bis main rate is in the multiple of 64kbps , 128kpbs or 256 Kbps, according using
which model.
Main Rate (Unit: kbps)
Annex AF/BG
TCPAM-16
TCPAM-32
SHDSL.bis
EFM Modem
multiple
N=3~60
N=12~89
2-wire model 64
192 ~ 3840
768 ~ 5696
4.4.1.6
SNR Margin
Generally, you aren’t necessary to change SNR margin, which range is from -10 to 21. SNR margin is an
index of line connection. You can see the actual SNR margin in STATUS SHDSL.bis. The larger is SNR
margin; the better is line connection quality. If you set SNR margin in the field as 5, the SHDSL.bis connection
will drop and reconnect when the SNR margin is lower than 5. On the other hand, the device will reduce the
line rate and reconnect for better line connection.
4.4.1.7
Line Probe
For adaptive mode, you can setup the Line Probe is Enable. The EFM modem will adapt the data rate
according to the line status. Otherwise, setup to Disable.
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