cx28394 Conexant Systems, Inc., cx28394 Datasheet - Page 180

• Manufacturer Part Number: cx28394
• Description: Quad/x16/octal-t1/e1/j1 Framers
• Manufacturer: Conexant Systems, Inc.

3.0 Registers
3.12 Transmitter Registers
Table 3-18. Criteria for T1 Loss/Recovery of Transmit Frame Alignment
3-58
FT Only
SF
SLC
ESF
Mode
Terminal Frame Alignment is recovered when:
Transmit Loss of Frame (TLOF) alignment is declared when:
Superframe alignment is recovered when:
Transmit loss of frame alignment (TLOF) declared when:
Superframe alignment is recovered when:
Fs errors do not cause Transmit Loss of Frame (TLOF) alignment.
Transmit loss of frame alignment (TLOF) declared when:
Extended superframe alignment is recovered when:
Transmit loss of frame alignment (TLOF) declared when:
If JYEL:
If no JYEL:
If only one valid FPS candidate and:
If two or more valid FPS candidates and:
•
•
•
•
•
•
•
•
•
•
One and only one valid Ft pattern (1010) is found in 12 alternate F-bit locations (3 ms), where F-bits
are separated by 193 bits.
Number of Ft bit errors detected meets selected loss of frame criteria [TLOFA–TLOFC; addr 071].
Terminal frame alignment is recovered, identifying Ft bits.
Depends on SF submode:
If SF pattern (00111x) found in Fs bits
SF pattern (001110) found in Fs bits. Fs errors do not cause Transmit Loss of Frame (TLOF) align-
ment.
Number of Ft bit errors detected meets selected reframe criteria [TLOFA–TLOFC; addr 071]. Notice
that Fs bit multiframe errors are reported in TMERR [ISR0; addr 00B], but do not cause a loss of
transmit frame alignment.
Terminal frame alignment is recovered, identifying Ft bits.
SLC pattern (refer to
Bellcore TR-TSY-000008.
Number of Ft bit errors detected meets selected reframe criteria [TLOFA–TLOFC; addr 071]. Notice
that Fs bit multiframe errors are reported in TMERR [ISR0; addr 00B], but do not cause a loss of
transmit frame alignment.
Valid FPC candidate located (001011). Candidate bits are each separated by 772 digits and received
without pattern errors:
No CRC mode: align to FPS regardless of CRC6 comparison.
Mimic CRC mode: align to FPS regardless of CRC6 comparison.
Force CRC mode: align to FPS only if CRC6 is correct.
No CRC mode: do not align (INVALID status)
Mimic CRC mode: align to first FPS with correct CRC6.
Force CRC mode: align to first FPS with correct CRC6.
Number of FPS pattern errors detected meets selected loss of frame criteria [TLOFA–TLOFC;
addr 071].
Table A-3, SLC-96 Fs Bit
Conexant
Description
Contents) found in 16 of 32 Fs bits according to
Quad/x16/Octal—T1/E1/J1 Framers
CX28394/28395/28398
100054E