Specifications

Chapter 1 General Information MX-2100/2104 Installation and Operation Manual
1-24 Application Considerations
Location A
Connected
to Location B
Connected
to Location C
Location C
User Connected
to Location B
User Connected
to Location A
Location B
User Connected
to Location C
User Connected
to Location A
KML A
Link A Link B
Bypassed Bits
MX-2100
MX-2100 MX-2100
KML B
Figure 1-13. Basic Bypassing Configuration
Figure 1-14 shows an example of bit routing between the various units.
Since the bypassing is bit-oriented, the two MX-2100 links can operate at different
data rates, but they must use bandwidth allocation units of equal sizes (refer to
Table 1-1 for allowable selections). Therefore, the bypassing can be performed
between links operating at rates within the same group of rates:
• 9.6, 14.4, 19.2, 28.8, or 32 kbps (0.4 kbps bandwidth allocation unit)
• 48, 56, 64, 128 or 192 kbps (0.8 kbps bandwidth allocation unit)
• 256 or 384 kbps (1.6 kbps bandwidth allocation unit)
• 512 or 768 kbps (3.2 kbps bandwidth allocation unit).
• 1024 or 1536 kbps (6.4 kbps bandwidth allocation unit).
In order for the user to be able to specify the allocation of main link bits to the
individual channels, the structure of the main link frame must be specified by the
user. Therefore, in a bypassing application the automatic bit allocation algorithm
used by MX-2100 must be disabled, and the allocation must be manually
performed. Manual allocation is required for every participating MX-2100.