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SONET
is a standard developed by Telcordia and ANSI for
transferring data over optical fibers. SDH is a
closely related ‘cousin’ to SONET developed in Europe by the ITU which differs in key details but
whose fundamental purpose is the same as in SONET.
SONET/SDH
can be thought of as a generic, all purpose data
transport mechanism which can support many varied
services such as PDH and ATM. SONET/SDH transport
represents the largest worldwide installed base and
offers a multitude of opportunities for the
efficient transport of both legacy and next
generation services.
|
Device |
AT4848 |
AT1212 |
AT4825 |
AT4850 |
AT1250 |
AT1240 |
|
Feature |
OC-48/12 Multi-Service ADM |
OC-12 Multi-Service ADM |
OC-48 Multi-Service ADM Lite |
OC-48/12 Ethernet over PDH/SONET Mapper
|
OC-12/3 Ethernet over PDH/SONET Mapper
|
OC-12/3 Ethernet over PDH/SONET Mapper
Lite |
|
Primary Differentiator |
Full Featured
OC-48 MSADM |
Full Featured
OC-12 MSADM |
Lite Featured
OC-48 MSADM |
Full Featured OC-48 Ethernet & Data
SONET/PDH Mapper |
Full PDH OC-12 Ethernet & Data SONET/PDH
Mapper |
Lite PDH OC-12 Ethernet & Data SONET/PDH
Mapper |
|
MSADM |
YEs |
YEs |
Yes |
No |
No |
No |
|
M13/E13 |
12 |
3 |
6 |
12 |
12 |
3 |
|
DS1/E1/DS3/E3 |
336/252/12/12 |
84/63/3/3 |
168/126/6/6 |
336/252/12/12 |
336/252/12/12 |
84/63/3/3 |
|
Network Fibers |
4@OC-48/12 |
2@OC-12 |
2@OC-48/12 |
4@OC-48/12 |
None |
None |
|
Protection |
BLSR, UPSR |
UPSR, 1+1 |
UPSR, 1+1 |
UPSR, 1+1 |
UPSR, 1+1 |
UPSR, 1+1 |
|
APS control |
Hardware/Software |
Hardware/Software |
Hardware/Software |
Hardware/Software |
Hardware/Software |
Hardware/Software |
|
Drop Fibers |
4@OC-12/3 |
4@OC-3 |
4@OC-12/3 |
None |
4@OC-12/3 |
4@OC-12 /3 |
|
Drop Mux mode |
9 EC-1 or 12 OC-3 |
9 EC-1 |
9 EC-1 or 12 OC-3 |
None |
None |
None |
|
Drop EC-1 |
3 |
3 |
3 |
None |
None |
None |
|
SPI-3 |
128 Ports |
128 Ports |
128 Ports |
128 Ports |
128 Ports |
128 Ports |
|
STS XC |
384x384 |
135x135 |
288x288 |
348x348 |
132x132 |
123x123 |
|
TU3 XC |
48x48 |
36x36 |
48x48 |
48x48 |
24x24 |
24x24 |
|
VT XC |
2688x2688 |
2100x2100 |
1848x1848 |
2016x2016 |
1344x1344 |
1092x1092 |
|
DS0 XC |
8Kx8K |
8Kx8K |
None |
None |
None |
None |
|
Expansion Interface |
2x622Mbps |
2x622Mbps |
None |
None |
None |
None |
|
SONET/PDH VCAT/LCAS |
128 VCGs Total |
128 VCGs Total |
128 VCGs Total |
128 VCGs Total |
128 VCGs Total |
128 VCGs Total |
|
POH Pool |
Selectable 511 |
Selectable 511 |
Selectable 511 |
Selectable 511 |
Selectable 511 |
Selectable 511 |
|
POH BER Pool |
Selectable 511 |
Selectable 511 |
Selectable 511 |
Selectable 511 |
Selectable 511 |
Selectable 128 |
|
TCM Pool |
Selectable 511 |
Selectable 511 |
Selectable 511 |
None |
None |
None |
|
Clock Synthesizer |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Redundancy Controller |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Typical Power |
8.5 Watts |
5-7 Watts |
6 Watts |
7 Watts |
5 Watts |
5 Watts |
|
Short Form Datasheet |
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