TXC-06412BROG Transwitch Corporation, TXC-06412BROG Datasheet - Page 112

• Manufacturer Part Number: TXC-06412BROG
• Manufacturer: Transwitch Corporation

Specifications of TXC-06412BROG

• Lead Free Status / Rohs Status: Compliant

PHAST-12P Device
DATA SHEET
TXC-06412B
PRELIMINARY TXC-06412B-MB, Ed. 2
June 2005
10.11.4 Example: STM-4/OC-12 Mode, 1+1 APS Protection
Figure 26
One PHAST-12P device handles the Worker line (W) while a second PHAST-12P handles the
Protection line (P). Both devices are interconnected through the full bandwidth of APS Port
interface. The cross connects of both devices setup a permanent bridge from the Worker
Transmit line to the Protection Transmit line over one of the APS Port interfaces. The
received protection payload is available on the other APS Port interface.
When the APS FSM detects a failure of the Worker line the cross connect of the Worker
PHAST-12P performs the protection switch. It connects the receive protected traffic to the
Receive APS Port interface which transports the payload of the received Protection line.
Protected Traffic
W
W
y
RxApsPort
TxApsPort
shows an example of a 1+1 APS protection architecture in STM-4/OC-12 mode.
Figure 26. STM-4/OC-12, 1+1 APS
RxApsPort
TxApsPort
-
P
Operation
-
Protected Traffic
Switch
W
W
y
TxApsPort
RxApsPort
RxApsPort
TxApsPort
P
1 1 2 o f 2 26