Table of Contents
Advertisement
OCD (Out of Cell Delineation)
Cell non-synchronization.
Detection:
If a cell in which an error is found as a result of HEC test has been received
Termination:
If a cell in which no error is found as a result of HEC test has been received
α
δ
*
= 6, 7, 8, or 9,
= 5, 6, 7, or 8. These values can be selected by using the OCDD[1:0] and OCDT[1:0] bits of the
MDATMR register. In the default mode,
LCD (Loss of Cell Delineation)
Status in which frame is lost.
Detection:
If the OCD status lasts for T ms.
Termination:
If a non-OCD status lasts for T ms.
* T = 4 ms or 0 ms. This can be selected by using the LCDDT bit of the MDATMR register. In the default mode, T = 4 ms.
When T = 0 ms, the detection/termination condition is the same as that of OCD.
CD (CD Pin State Change)
Indicates that the CD pin input goes low.
Detection:
If the CD pin input level goes low.
Termination:
If the input level goes high again.
The changes in the input level of the CD pin can be included in the LOS detection condition by setting the CDO bit of the
MDSOHR register.
CD pin = Low: LOS status
High: Normal status
(Notice that the pin input level is opposite to the logic of the bit of the register.)
CHAPTER 3 FUNCTIONAL OUTLINE
Table 3-14. Alarms and Failures (4/4)
α
δ
= 7 and
= 6.
PRELIMINARY
α
times in a row.
δ
times + 1 in a row.
NEC confidential and Proprietary
83
Advertisement
Table of Contents
