Specifications

Chapter 1 Introduction Installation and Operation Manual
1-10 Functional Description HS-RN MP-2100/2104 Ver. 12.6, MP-4100 Ver. 2.0
Channel Rates
Table 1-1 lists the HS-RN data rates available in the V.110 and HDLC operating
modes.
Table 1-1. HS-RN Channel Rates in HDLC and V.110 Operating Modes
Channel Rate HDLC - Bandwidth Optimized HDLC - Latency Optimized V.110
Sync Async Sync Async Sync Async
0.6 kbps
√ √ √ √ √ √
1.2 kbps
√ √ √ √ √ √
2.4 kbps
√ √ √ √ √ √
4.8 kbps
√ √ √ √ √ √
7.2 kbps
√ √ √ √
9.6 kbps
√ √ √ √ √ √
14.4 kbps
√ √ √ √
19.2 kbps
√ √ √ √ √ √
28.8 kbps
√ √
38.4 kbps
√ √ √ √
56 kbps
√ √
64 kbps
√ √
Channel Rate Adaptation Processor
Rate adaptation is needed at all the channel rates, except 56 and 64 kbps. Each
channel has its own channel rate adaptation processor, which is used to adapt
the user’s payload data rate to a multiple of 16 kbps (16 kbps, or two bits, is the
main link bandwidth allocation unit).
The difference between the assigned and payload bandwidth also enables
end-to-end transfer of RS-232 interface signal states, when a channel is
configured to support this service.
Table 1-2 lists the supported user's payload data rates, the data rate obtained
after rate adaptation, the number of main link bits assigned by the HS-RN
channel to carry the channel payload data, and the corresponding fraction of
main link timeslot for each data rate.
When a channel operates in any one of the broadcast modes or latency
optimization mode, it must be assigned a full main link timeslot, although it may
not utilize the full timeslot bandwidth.
To assign a fraction of a timeslot for the module installed in the MP-2100/2104
chassis, use a DEF SPLIT TS A:B:C command, as explained in the
Megaplex-2100/2104 Installation and Operation Manual . For the module installed
in the MP-4100 chassis, use the Configuration>System>TS Assignment screen.
Note