SAGEM 3P@C

Table 12-1 ADSL parameter setting table

Downstream

 

Parameter

Upstream configuration

Parameter

configuration items

Setting

items

 

 

setting

Maximum

downstream

255

Maximum

upstream

255

interleaving delay (mS)

 

interleaving delay (mS)

 

Target downstream noise

> = 6

Target upstream

noise

> =6

margin (dB)

 

 

margin (dB)

 

 

Minimum

downstream

0

Minimum

upstream

noise

0

noise margin (dB)

 

margin (dB)

 

 

Minimum

downstream

32

Minimum

upstream

rate

32

rate (Kbps)

 

 

(Kbps)

 

 

 

Maximum

downstream

8160

Maximum

upstream

rate

1024

rate (Kbps)

 

 

(Kbps)

 

 

 

Maximum

downstream

31

Maximum

downstream

31

noise margin (dB)

 

noise margin (dB)

 

 

Minimum

downstream

0

Minimum upstream training

0

training noise margin (dB)

 

noise margin (dB)

 

 

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.

3P@C Installation Manual

Page 12-3

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