tdat04622 ETC-unknow, tdat04622 Datasheet - Page 93

• Manufacturer Part Number: tdat04622
• Description: Tdat Sonet/sdh 155/622/2488 Mbits/s Data Interfaces
• Manufacturer: ETC-unknow

Data Sheet
May 2001
Agere Systems Inc.
Functional Description
Path Terminator (PT) Block
Z5/N1, Z4/K4, Z3/F3, H4, F2 Monitoring. TDAT042G5 monitors the F2 user channel byte, the H4 VT multiframe
indicator byte, Z3/F3 growth/user byte, Z4/K4 growth/APS path byte, and the Z5/N1 tandem connection byte.
These bytes are stored in software registers. These registers are updated when a provisionable number of detec-
tions of new values occur on the associated incoming byte. All monitoring is disabled when the pointer is in an
LOP-P or an AIS-P state.
Signal Failure and Signal Degrade Monitoring. The path overhead processor also detects/clears provisionable
signal fail (SF) and signal degrade (SD) conditions. The SF and SD values are provisionable through a group of
software registers in the PT register map. The provisioning is the same as that shown in Table 16, page 57 of the
Overhead Processor (OHP) Block section.
SPE Generate
Transmit Pointer Generation. The pointer generation block generates the outgoing H1 and H2 pointer values.
Each of the four PT channels can generate one normal (valid) pointer. Therefore, in STS-3/STM-1 and STS-12/
STM-4 modes, only one normal pointer (and only one SPE) may be inserted into the transmitted SONET/SDH
frame. In STS-48/STM-12 mode, all four PT channels are used. Therefore, up to four normal pointers (and four
SPEs) may be inserted into the transmitted SONET/SDH frame.
When inserting concatenated frames, only the first H1 and H2 bytes will contain a valid pointer value. The remain-
ing H1 and H2 bytes of the channel will be set to indicate concatenation. The remaining unequipped channels will
have their H1 and H2 pointers set to a fixed pointer value.
For proper pointer generation, the appropriate values must be provisioned in the H-byte transmit state register
THx_STATE (see register description, page 203).
The following examples illustrate how the device may be configured to transmit various sub-rates and concate-
nated payloads. Each block in the following diagrams represents one STS-1 frame. Figure 8 illustrates how to pro-
vision the THx_STATE registers to transmit an STS-48c frame within an STS-48 signal. In this example, the pointer
to the first STS-1 is provisioned as a normal pointer value while the pointers to the remaining STS-1 signals are
provisioned as concatenated pointers. Figure 9 illustrates how to provision the THx_STATE registers to transmit
four STS-12c frames within an STS-48 signal. The concatenated STS-Mc frames that may be mapped into STS-N
signals (where M ≤ N) are restricted to those listed in Table 22 (see page 68).
12
39
42
45
48
01
01
01
01
11
27
30
33
36
01
01
01
01
15
18
21
24
01
01
01
01
10
Figure 8. STS-48 Signal Carrying One STS-48c Frame
12
01
01
01
01
9
3
6
9
47 CONCATENATED POINTERS
(continued)
(continued)
38
41
44
47
01
01
01
01
8
26
29
32
35
01
01
01
01
7
14
17
20
23
01
01
01
01
6
11
01
01
01
01
5
2
5
8
37
40
43
46
01
01
01
01
4
25
28
31
34
01
01
01
01
3
13
16
19
22
01
01
01
01
155/622/2488 Mbits/s Data Interface
2
10
00
01
01
01
1
1
4
7
TIME-SLOT NUMBER
NORMAL POINTER
TH
TH
TH
TH
TDAT042G5 SONET/SDH
X
X
X
X
_STATE[A][12—1][1:0]
_STATE[B][12—1][1:0]
_STATE[C][12—1][1:0]
_STATE[D][12—1][1:0]
0351(F)
65