Specifications

HighWire MTP-2 - 1.2, September 4, 2002 HW-MTP2 Interface Overview 27
3-2. HW-MTP2 Interface Overview
The following external interfaces are present between MTP3 and HighWire
MTP2 (HW-MTP2).
• HW-MTP2 Level 2 - Level 3 Management Interface
• HW-MTP2 Level 2 - Level 3 Data Interface
These interfaces are illustrated in Figure 3-1.
Figure 3-1 HW-MTP2 Level2 - Level 3 interfaces
The Level 2 - Level 3 Management and Data Interfaces are described in
Chapters 5–8 of this manual.
Throughout this manual, the term “L2” will be used to refer to any Level 2
component using these interfaces (for example, HW-MTP2 or a third party
product), and “L3” refers to any Level 3 component using these interfaces (for
example, MTP3).
Note that each instance of HW-MTP2 can be used by only one MTP3 instance
at a time. Each MTP3 instance may use multiple instances of HW-MTP2.
The signals passed over these interfaces comply with the specifications of the
ITU-T recommendation and the ANSI recommendation. Any differences in the
messages used between the two recommendations are indicated where
relevant.