Networking Information; Link Mode Optimization; Ip Link Mode Optimization; Tdm Link Mode Optimization - Motorola PTP 300 Series User Manual

3.7

Networking Information

The PTP 300 Series Bridge operates as a transparent Ethernet bridge. Although each unit
requires an IP address, this IP address is for management purposes only, and it plays no part
in the forwarding of bridged Ethernet frames. IP addresses are assigned during initial
configuration as described in Section 6 "Installation".
3.8

Link Mode Optimization

Link Mode Optimization allows the PTP 300 link to be optimized according to the type of
traffic that will be bridged. The link supports two modes: IP mode and TDM mode.

3.8.1 IP Link Mode Optimization

IP mode is optimized to provide the maximum possible link capacity. IP mode is an
appropriate choice where applications in the bridged networks provide some measure of
reliable transmission, and where very low latency is not critical.
IP mode supports both fixed and adaptive link symmetry (see Section 3.4 "Channel
Bandwidth and Link Symmetry Control").

3.8.2 TDM Link Mode Optimization

TDM mode is optimized to provide the lowest possible latency. TDM mode additionally
implements a more conservative approach to adaptive modulation, leading to lower error
rates in fading channels at the expense of slightly lower link capacity. TDM mode is an
appropriate choice for delay intolerant data without reliable transmission (for example voice
over IP data).
TDM mode supports fixed link symmetry only (see Section 3.4 "Channel Bandwidth and Link
Symmetry Control").
TDM mode is selected automatically when Telecom interfaces are enabled.
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3 Product Features