Siemens SIMATIC NET SCALANCE M826 Operating Instructions Manual page 48

Connecting up
4.5 DSL connection
Distance [km]
1.0
2.5
5.0
7.5
Cascading SHDSL
Wire up the second terminal block (X2) of the device to the first terminal block (X1) of the
next device.
Ring redundancy with SHDSL
The Rapid Spanning Tree protocol runs only on the SHDSL interfaces. If you wire the
DHDSL interfaces to form a ring (see figure) you must not interconnect the Ethernet
interfaces of these devices that are in the same VLAN as the SHDSL interfaces. Otherwise
this leads to the formation of loops.
DP
RP
AP
48
Max. possible data transmission rate [Mbps]
Copper 2-wire cable with
a diameter of 0.6 mm
9.24
4.47
1.33
0.40
Designated Port
Root Port
Alternate Port
Copper 2-wire cable with
a diameter of 1.4 mm
11.6
7.92
4.18
2.21
Operating Instructions, 08/2018, C79000-G8976-C362-05
SCALANCE M826