Sagem 4450E - Manual (Page 160)

SAGEM 3P@C
3P@C Installation Manual
Page 12-3 Reproduction and communication in any form prohibited without the written permission of
SAGEM SA
Table 12-1 ADSL parameter setting table
Downstream
configuration items Parameter
Setting Upstream configuration
items Parameter
setting
Maximum downstream
interleaving delay (mS) 255 Maximum upstream
interleaving delay (mS) 255
Target downstream noise
margin (dB) > = 6 Target upstream noise
margin (dB) > =6
Minimum downstream
noise margin (dB) 0 Minimum upstream noise
margin (dB) 0
Minimum downstream
rate (Kbps) 32 Minimum upstream rate
(Kbps) 32
Maximum downstream
rate (Kbps) 8160 Maximum upstream rate
(Kbps) 1024
Maximum downstream
noise margin (dB) 31 Maximum downstream
noise margin (dB) 31
Minimum downstream
training noise margin (dB) 0 Minimum upstream training
noise margin (dB) 0
The ADSL equipment produced by Harbor Network Co., Ltd provides the full-rate working mode
(g.992.1/T1.413) and G.Lite according to the general ADSL standard in the industry. The default working mode
of the equipment at the central office end is of multi-mode, it is determined by the Modem and the equipment at
the central office end through negotiation.
The channel working mode is determined by operators basing on the demands of users, and for those users who
have high requirements for delay such as VOD, interactive games and conference call; for such services as
Internet accessing and data downloading, it is recommended to use the interleaving mode.
The related parameter setting is described as follows:
„ Upon meeting the requirements, the upstream/downstream interleaving delay can be adjusted
in ms, with the range of 0 to 255, and its default parameter configuration is: 24ms for
downstream and 16 ms for upstream.
„ The out-of-factory default setting of the upstream/downstream minimum noise margin is 0db, it
is strongly recommended not to modify this value. If this value increases, part of the lines may
be not able to be synchronized (the users with a line length of over 3km cannot be connected).
„ The default configuration for the upstream/downstream maximum noise margin is 31db, in the
case of good line situations, this parameter can be lowered to achieve the goal of reducing the
transmission power.
„ The default configuration of the target noise margin is 6db, and to lower the value of the target
noise margin, the synchronization rate of the subscriber line can be increased. Change is not
recommended.
„ The minimum connection rate for upstream and downstream is 32Kbps, it is strongly
recommended to keep it unchanged. If this value is too high, some lines may not be
connected or connected unstably, especially when the distance of the line exceeds the 3km
subscriber line.
„ The maximum upstream/downstream connection rate is an optional value with the range of
32-896Kbps and 32-7616Kbps, and the specific value can be determined basing on the
selection of operators. The current general way is to use different rates for charging in
segments, and the upstream/downstream rate can be divided into multiple levels such as
128/512Kbps, 512/1024Kbps, and 512/2048Kbps.
„ The default value of the minimum training noise margin is 0dB, it is strongly recommended to
keep it unchanged.