Local system advertises the same own parameters to its neighbours.
3.2.3 An Integrated Switch of 64-kbit/s Time Slots
3.2.3.1 E1 Transmission Mode (only E1 Time Slots)
In this mode, only time slots of E1 data streams are transmitted over SHDSL lines according to
ITU-T Rec. G.991.2.
Table 3.10 Comparison of SHDSL data rate and number of possible time slots of one E1 stream
3.2.3.2 E1, Nx64/RS-232/RS-485 and Ethernet Simultaneous Transmission Mode
The system supports simultaneous transmission of E1 time slots, Nx64/RS-232/RS-485 data and
Ethernet data (from the ports WAN1, WAN2, WAN3, WAN4, and the internal Ethernet switch) into
an SHDSL line. This mode means time slot multiplexing from E1, Nx64/RS-232/RS-485 and
Ethernet network interface into the SHDSL line. The distribution of SHDSL time slots is performed
as follows:
• time slots of the first E1, chosen for transmission in the SHDSL line interface in the
ascending order, are transmitted in time slots from 0 to m1-1
• time slots of the second E1, chosen for transmission in the SHDSL line interface in the
ascending order, are transmitted in time slots from m1 to m1+m2-1
• Nx64/RS-232/RS-485 data is transmitted in time slots from m1+m2 to m1+m2+m3-1
• Ethernet data is transmitted in time slots from m1+m2+m3 to n-1
Here
• n is the total number of transmitted SHDSL time slots
• m1 is the number of time slots from the first E1 selected for transmission into SHDSL
• m2 is the number of time slots from the second E1 selected for transmission into SHDSL
• m3 is the numer of time slots required for Nx64/RS-232/RS-485 data
Note: A part of time slots of an E1 interface can be used to transmit data from the WAN2 port of
the internal Ethernet switch.
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