参数资料
型号: PEF2080
厂商: SIEMENS AG
英文描述: S/T Bus Interface Circuit(SBC)
中文描述: S / T的总线接口电路(SBC)的
文件页数: 40/74页
文件大小: 2620K
代理商: PEF2080
Semiconductor Group
41
Operational Description
3.3
Control of Layer 1
The state diagrams are shown in
figures 24 to 26
. The activation/deactivation implemented by the
SBC in its different operating modes agrees with the requirements set forth in CCITT re-
commendations. State identifiers F1-F8 (TE/LT-T) and G1-G4 (NT/LT-S) are in keeping with
CCITT I.430. In the NT mode the four states have been expanded to implement a full handshake
between the ends of the subscriber loop.
In the state diagrams a notation is employed which explicitly specifies the inputs and outputs on the
S interface and in the C/l channel:
see figure 23
.
Figure 23
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