TXC-06412BROG Transwitch Corporation, TXC-06412BROG Datasheet - Page 109

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

Specifications of TXC-06412BROG

• Lead Free Status / Rohs Status: Compliant

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10.11 AUTOMATIC PROTECTION SWITCHING
10.11.1 Single Device Operation
10.11.2 Dual Device Operation
W1
W1
To/From POH Monitor/Generator
The PHAST-12P device will support two 1+1, two 1:1 or one 1:n (n=2-3) protection groups
within a single PHAST-12P device in STM-1/OC-3 mode. The incoming K1/K2 APS will be
monitored by the TOH Monitor block. The outgoing K1/K2 APS will be generated by the TOH
Generator block. The high order path cross connect will support bridge and switch operation.
Figure 24
line #2.
When two PHAST-12P devices are connected through the APS Port Interface, the following
protection schemes are supported:
The APS Port interface will transport payload data and the APS finite state machine (FSM)
indications between the two participating PHAST-12P devices. The interface consists of two
point-to-point interfaces: one will transport payload data and FSM indications from the worker
lines to the protection line, the other will transport payload data and FSM indications from the
protection line to the worker lines.
The FSM indications include:
• 1+1, 1:1 or 1:n (n<=7) in STM-1/OC-3 mode,
• 1+1 or 1:1 in STM-4/OC-12 mode.
Protected Traffic
W2
W2
Cross Connect
Figure 24. STM-1/OC-3, 1:3 APS with One PHAST-12P
shows a 1:3 APS in idle state and in bridge/switch state after a failure of working
W3
W3
Traffic
Extra
P
E
- Operation -
W1
W1
To/From POH Monitor/Generator
Protected Traffic
Switch
W2
W2
y
PRELIMINARY TXC-06412B-MB, Ed. 2
Connect
Cross
W3
PHAST-12P Device
W3
Squelch
DATA SHEET
Traffic
Extra
E
P
Bridge
TXC-06412B
June 2005