Specifications

MP-2100 HS-R Installation and Operation Manual Introduction
Functional Description 1-5
1.3 Functional Description
Main Features
Each HS-R channel operates independently. All the channel operating parameters
are controlled by Megaplex system management.
Basically, each HS-R channel is assigned an individual timeslot in the T1 or E1
main link frame. The HS-R modules also support split timeslot assignment,
therefore improving main link bandwidth utilization.
The timeslots assigned to HS-R channels can be manually assigned by the user.
User-controlled manual timeslot assignment allows the routing of the bit stream
generated by each local channel to any other compatible Megaplex channel at the
remote site, e.g., to another channel of a high-speed module such as HS-2, HS-3,
HS-Q, HS-R, HS-S, HS-4, or HS-U, or to another type of module, such as an
HS-ETH module.
Channel Characteristics
Each HS-R module channel can be configured by the user for asynchronous or
synchronous operation. Each channel has a DCE RS-232 interface.
Asynchronous Mode
The data rates supported in the asynchronous mode are 0.6, 1.2, 2.4, 4.8, 9.6,
19.2, and 38.4 kbps. The V.110 frame structure used at these rates consists of 80
bits.
In the asynchronous mode, the user can specify the structure of the word format to
be processed by each channel (this structure must be identical to that used by the
user's DTE). The available options are as follows:
• Number of data bits: 5, 6, 7, or 8.
• Use of parity: if the user's DTE word format includes a parity bit, the user can
enable transparent end-to-end transfer of the original parity bit. The module
itself does not check the parity of the incoming data.
• Number of stop bits: 1 or 2.
In addition to the selected parameters, the word format includes one start bit.
Synchronous Mode
The data rates supported in the synchronous mode are 0.6, 1.2, 2.4, 4.8, 9.6,
19.2, 38.4, 48, 56, and 64 kbps. The V.110 frame structure used in the
synchronous mode depends on the data rate:
• At rates up to 38.4 kbps, the V.110 frame consists of 80 bits.
• At 48 kbps, the V.110 frame consists of 32 bits.