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10
TAU-4M.IP Subscriber gateway
Device network features block
enables IP packet transmission and switching according to the device
routing table. Depending on the network interface, this block can process both tagged and untagged packets.
Supports DHCP, PPPoE, PPTP, L2TP.
VoIP block
enables SIP protocol operation for transmission of voice signals through the network that
features packet switching. Subscriber’s voice signal is transferred to the SLIC subscriber unit module, where it is
converted into digital form. The digitized signal is transferred to VoIP block to be encoded using one of the
selected standards and is transferred further in the form of digital packets to the controller via the intrasystem
backbone. In addition to voice signals, digital packets contain control and interaction signals.
Multicast traffic processing block
enables processing of IGMP messages and multicast traffic for IPTV
functions support.
Control block
based on Linux operating system monitors operation of all the other blocks and the device
subsystems and manages their interaction.
Fig 3 shows
TAU-4M.IP
functional diagram.
Figure 3 –
TAU- 4M.IP
functional diagram