PM8610-BIAP PMC [PMC-Sierra, Inc], PM8610-BIAP Datasheet - Page 66

• Manufacturer Part Number: PM8610-BIAP
• Description: SBS Telecom Standard Product Data Sheet Preliminary
• Manufacturer: PMC [PMC-Sierra, Inc]

10.1.8
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000168, Issue 3
Table 14 DS3 Multi-frame Stuffing Format
DS3 asynchronous timing is compensated via the H3 octet as described in section 10.1.2. DS3
link rate adjustments are optionally passed across the SBI via the Linkrate octet as described in
section 10.1.3. DS3 alarm conditions are optionally passed across the SBI bus via the Linkrate
octet as described in section 10.1.3 and 10.1.4.
Table 15 shows a E3 tributary mapped within the first synchronous payload envelope SPE1. The
V5 indicator pulse identifies the V5 octet. The E3 framing format does not follow an 8KHz frame
period so the floating frame located by the V5 indicator and shown in grey in Table 15, will jump
around relative to the H1 frame on every pass. In fact the V5 indicator will be asserted two or
three times per H1 frame, as is shown by the second and third V5 octet in Table 15. The V5
indicator and payload signals indicate negative and positive rate adjustments which are carried
out by either putting a data byte in the H3 octet or leaving empty the octet after the H3 octet.
Table 15 E3 Framing Format
ROW
1
2
3
4
5
6
7
8
9
V5
V5
V5
V5
V5
V5
E3 Tributary Mapping
SPE
COL #
SBI
COL#
1,4,7,10
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
4*R
4*R
4*R
4*R
4*R
5*R
8*B
8*B
8*B
8*B
8*B
8*B
13
H1
H2
H3
Linkrate
Unused
Unused
Unused
Unused
Unused
5*R
5*R
5*R
5*R
5*R
5*R
8*B
8*B
8*B
8*B
8*B
8*B
E3
1
16
V5
E3
E3
E3
E3
E3
E3
E3
E3
5*R
5*R
5*R
5*R
5*R
5*R
E3
2-18
E3
E3
E3
E3
E3
E3
E3
E3
E3
8*B
8*B
8*B
8*B
8*B
8*B
5*R
5*R
5*R
5*R
5*R
5*R
E3
19
70
E3
E3
E3
V5
E3
E3
E3
E3
E3
8*B
8*B
8*B
8*B
8*B
8*B
SBS Telecom Standard Product Data Sheet
E3
20-38
E3
E3
E3
E3
E3
E3
E3
E3
E3
5*R
5*R
5*R
5*R
5*R
5*R
8*B
8*B
8*B
8*B
8*B
8*B
E3
39
130
E3
E3
E3
E3
E3
E3
V5
E3
E3
5*R
5*R
5*R
5*R
5*R
5*R
E3
40-84
E3
E3
E3
E3
E3
E3
E3
E3
E3
8*B
8*B
8*B
8*B
8*B
8*B
5*R
5*R
5*R
5*R
5*R
5*R
Preliminary
E3
85
268
E3
E3
E3
E3
E3
E3
E3
E3
E3
8*B
8*B
8*B
8*B
8*B
8*B
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