User guide

Standards Technology Implementation
2-3
Telesyn Service Guide (Optimizing Data Services (SHDSL))
2.2 Technology Implementation
2.2.1 Standards
2.2.2 Telesyn Implementation
The Telesyn SHDSL16 service module provides symmetric transmission at a 2.3Mbps data rate over one pair of
copper telephone wires, providing service for digital data. The SHDSL16 SM transports Ethernet packets encap-
sulated within ATM cells via RFC1483 bridging. The ATM cells are transported over twisted pair wiring with
SHDSL encoding as AAL5. The subscriber CPE is a SHDSL modem that recovers the Ethernet packets from the
ATM payload.
The following figure illustrates averages rates over specific loop lengths.
FIGURE 2-3 Average rates for specific loop lengths
Standard Compliance Notes
G.SHDSL Standard, ITU G.991.2 (Annex A & B) Y N/A
ITU G.994.1 (G.handshake, Handshake Procedures for
Digital Subscriber Line (DSL) Transceivers)
YN/A
Loop Length (km)
Attained Line Rate (kbps) (Average)
SHDSL
0
500
1000
1500
2000
2500
01234567
2312 2312 2312 2312 2120 968 520 328-
Average Rates
Modem - Xavi 3102r
Maximum Upstream Rate - 2312
Maximum Downstream Rate - 72