TXC-06412BROG Transwitch Corporation, TXC-06412BROG Datasheet - Page 132

• 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
11.9 LINE ALARM INDICATION (RING) PORT INTERFACE
11.9.1 Internal Line Alarm Indication (Ring) Port Interface
11.9.2 External Line Alarm Indication (Ring) Port Interface
Note: Configuration of the Receive DCC Port interface is done in the memory map of the
TOH and DCC Port (see
DCC_Port_Enable setting. If the Receive DCC Port is disabled, the Receive Port Clock
DCCRXCLK output will be held low.
The Line Alarm Indication (Ring) Port Interface transports the Remote Information (RI) from
the TOH sink/monitor to the TOH source/generator. The Remote Information consists of the
REI and RDI values to be inserted by the TOH generator.
The TOH monitors send the Remote Information of all SDH/SONET lines to the Receive Line
Alarm Indication (Ring) Port Interface. This port multicasts the information internally to the
POH generator and externally to the Receive Alarm Indication (Ring) Port Interface.
The source for the Remote Information can be selected in the TOH generator, per SDH/
SONET line. When the Remote Information is taken from the Transmit Line Alarm Indication
(Ring) Port Interface, it is possible to configure the Line Alarm Indication (Ring) Port Interface
to use the internally or externally available information.
When sink and source are handled on one device, the internal ring port can be used
(ExternalSourceSelect deasserted). The Transmit Line Alarm Indication (Ring) Port
Interface leads must then be connected to VSS.
Figure 37
The external Line Alarm Indication (Ring) Port Interface is necessary when sink and source
are processed on two different devices. The Receive Line Ring Port / Alarm Interface of the
sink has to be connected to the Transmit Line Ring Port / Alarm Interface of the source and
the external source mode has to be selected (ExternalSourceSelect asserted).
Figure 38
Figure 37. Internal Line Alarm Indication (Ring) Port Interface
-
High Order Pointer Tracking, Retiming and Pointer Generation
shows the use of the internal Line Alarm Indication (Ring) Port Interface.
shows the use of the external Line Alarm Indication (Ring) Port Interface.
Tx Line Interface
TOH
Generator
Table
37). The Receive DCC port has to be enabled by the
Line Alarm
Indication
(Ring) Port
Rx Line Interface
TOH Monitor
aRDI
REI
PHAST-12P
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