Zte ZXDSL 9210 (V3.1), Техническое руководство

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7. Implements the transfer of bi-directional 10M Ethernet frame information 1.15
km away over AWG26 twisted pairs (and 1.3 km away over AWG24 twisted
pairs).
8. The Central Office (CO) equipment implements software/hardware control of
the CPE MODEM by means of the internal bus.
4.2.2.2 Operating Principles of VTIEF
The operating principles of VTIEF are shown in Fig. 4.2-2.
VDSL module
CPU
HDLC controller
G. Link bus HDLC channel
Backplane
Ethernet processor
Fig. 4.2-2 Operating Principles of VTIEF
VTIEF consists of the CPU module, HDLC controller, Ethernet processor, and VDSL
module. Each module provides the following functions:
1. The CPU module controls boards and is responsible for the communication with
SCBF;
2. The HDLC module is used to manage HDLC channels.
3. The Ethernet processor is responsible for switching between ports within boards,
and provides the G.Link bus responsible for switching and convergence between
SCBF and other boards in the system.
4. The VDSL module consists of the filter, line driver, and MAC, and implements
24 channels of VDSL user access.