Connections Sub-System; Table 34. High Order/Low Order Connections For 1660Sm - Alcatel 1660SM Technical Handbook

3.2 Connections sub–system
This sub–system allows connections between any SDH, SONET, PDH or ISA (Integrated Service Adapter)
ports
The connections can be realized at VC–12, VC–3, and VC–4 level using a not blocking matrix present
on the MATRIXE unit.
Several types of connections may be established, such as:
•
Unidirectional Point to Point
•
Unidirectional Point to Multipoint
•
Bidirectional Point to Point
Cross–connection function can be considered within two layers: HO Layer and LO layer. Refer to
Figure 98. on page 199.
The maximum matrix cross connection capability can be 256x256 STM–1 equivalent port at VC–12 /
VC–3 level + 384x384 equivalent port at VC–4 level.
The following table illustrates the connections for each unit:

Table 34. High Order/Low Order connections for 1660SM

PORTS Struc-
ture
STM–1,
AU–4
STM–4,
TU–3
STM–16
TU–12
OC3 AU–3
140 Mbit/s VC–4
34Mbit/s
45Mbit/s VC–3
2Mbit/s VC–12
The above connections allows the 1660SM to realize Multi Line Terminal configuration, Add/Drop
configuration and Mini Cross–Connect configurations in linear links, rings, and mashed network as
describe in Chapter 1 on page 63.
AU4–4C and AU4–16C concatenated signals can also be cross connected between any STM–4 and
STM–16 ports.
ED
02
STM–1, STM–4, STM–16,
STM–64 ports
AU–4 TU–3 TU–12
Yes – –
– Yes –
– – Yes
– Yes –
Yes – –
– Yes –
– – Yes
OC3 140 Mbit/s 34 Mbit/s
ports ports 45 Mbit/s
AU–3 VC–4
– Yes
Yes –
– –
Yes –
– Yes
– –
– –
3AL 91669 AA AA
674
2 Mbit/s
ports
ports
VC–3 VC–12
– –
Yes –
– Yes
– –
– –
Yes –
– Yes
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