S-Access ETHERLINK IV Technical Description And Operations Manual
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DT Etherlink IV User Manual- 17 -Table 3.4 Line settings per SHDSL interface, single pair3.2.2.1.1 Master/SlaveTo establish a connection, it is necessary that one transceiver side is configured as Master and theother as Slave. In this case, the connection is controlled by the Master device.3.2.2.1.2 Multipair ModeIf 2, 3 or 4 SHDSL channels are configured to operate in the multipair mode, they work at the sameclock frequency and line rate like one SHDSL channel with doubled, tripled or quadrupledtransmission capacity. Similarly to the independent channel, such a combined channel cansimultaneously transmit one or several E1 streams and one WAN stream. This transmission is alsoplesiochronous. All E1 streams that are transmitted over one SHDSL interface should use the sameclock frequency per direction.In multipair mode, one SHDSL channel serves as a “master” channel, while the other SHDSLchannels serve as “slave” channels. If the link in one channel fails, links in all other channels breaktoo and the procedure of connection/activation restarts.The four-channel modems provide a possibility to organize pair-wise channels, i.e., these two two-pair links will operate independently from each other. The main application for the multipair mode isthe increasing of the transmission range. In this case, some channels operate at low transmissionrates. In multipair mode some limitations are imposed on the Baserate parameter.Mode Coding Type Baserate Transmission Data Rate Standard2-pair, Master/SlaveFix ConfigurationPAM16 3..60 2*Baserate*64kbit/s Annex A, Annex B,Annex AB (autodetection)PAM32 12..892-pair, MasterAutodetectionPAM16 Auto (3..60) Annex AB (autodetection)PAM32 Auto (12..89)2-pair, SlaveAutodetectionAuto (PAM16/32) Auto (3..89) Annex AB (autodetection)3-pair, Master/SlaveFix ConfigurationPAM16 3..60 3*Baserate*64kbit/s Annex A, Annex B,Annex AB (autodetection)PAM32 12..853-pair, MasterAutodetectionPAM16 Auto (3..60) Annex AB (autodetection)PAM32 Auto (12..85)3-pair, SlaveAutodetectionAuto (PAM16/32) Auto (3..85) Annex AB (autodetection)4-pair, Master/SlaveFix ConfigurationPAM16 3..60 4*Baserate*64kbit/s Annex A, Annex B,Annex AB (autodetection)PAM32 12..644-pair, MasterAutodetectionPAM16 Auto (3..60) Annex AB (autodetection)PAM32 Auto (12..64)4-pair, SlaveAutodetectionAuto (PAM16/32) Auto (3..64) Annex AB (autodetection)Mode Coding Type Baserate TransmissionData RateStandardMaster/SlaveFix ConfigurationPAM16 3..60 Baserate* 64kbit/sAnnex A, Annex B,Annex AB (autodetection)PAM32 12..89MasterAutodetectionPAM16 Auto (3..60) Annex AB (autodetection)PAM32 Auto (12..89)SlaveAutodetectionAuto (PAM16/32) Auto (3..89) Annex AB (autodetection) |
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