Teleconnect SHDSL.EVB.4CH, Руководство пользователя

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SHDSL.EVB.4CH User Manual
Revision: 1.0.0, 2019-02-05 18/37 shdsl@teleconnect.de
3.9.3 Rotary switch (10 pole)
The rotary switch S603
(named “BITRATE”) is used for selection of the bitrates. Table 9 shows
choice of bitrates.
If the switch position is stable for more than 4 seconds the software will accept the new setting
and reconfigure the SHDSL chipset. An established data transmission will be interrupted
during reconfiguration.
Table 9: Selectable Bitrates of SHDSL.EVB.4CH
Switch
position
Extended Rates
(DIP switch 2)
Line probing Bitrate [Kbps] PAM
0 (default) Off Enabled
192…5696
Auto
1 Off Disabled 192 16
2 Off Disabled 384 16
3 Off Disabled 512 16
4 Off Disabled 768 16
5 Off Disabled 1536 16
6 Off Disabled 2048 16
7 Off Disabled 2304 32
8 Off Disabled 3072 32
9 Off Disabled 5696 32
Switch
position
Extended Rates
(DIP switch 2)
Line probing Bitrate [Kbps] PAM
0 (default) On Enabled
64…15336
Auto
1
1
On Disabled 64
*
4
2
*
On Disabled 192
*
4
3
*
On Disabled 192
*
8
4
*
On Disabled 2496
*
4
5
*
On Disabled 5056
*
8
6
*
On Disabled 7616
*
16
7
*
On Disabled 10176
*
32
8
*
On Disabled 12736
*
64
9
*
On Disabled 15288
*
128
The best choice for most applications is switch position 0 which enables the Power
Measurement Modulation Session (PMMS), also called
“Line Probing”. PMMS works like an
automatic mode, in that case SHDSL chipset selects the highest given bitrate for actual noise
floor and loop length. The bitrate differs depending on extended rates that are enabled or not
(see Table 8). The target SNR margin is always set to 6 dB.
3.9.4 Rotary switch (16 pole)
The rotary switch S501 (named “HARDWARE CONFIG”) cannot be used at the current
development stage.
3.9.5 LEDs
Nine LEDs indicating the current state of SHDSL.EVB.4CH. For the location of the LEDs
please have a look at Figure 4 on page 9.
1
The configuration of fixed bitrates in extended rates mode is only possible by SHDSL Master (CO
mode, STU-C). The SHDSL Slave (CPE mode, STU-R) ignores the switch position and always uses
line probing (switch position 0).