Appendix G. Ecm (Entry Channel Mode; Functional Overview; Ecm Terminology - Comtec CDM-840 Installation And Operation Manual

G.1

Functional Overview

G.1.1

ECM Terminology

Abbreviation Term
ASR Application Switch Request
BUC Block Up Converter
Comtech Dynamic Routing
CDRP
Protocol
Dynamic Single Channel Per
dSCPC
Carrier
HCC Hub Channel Controller
LNB Low-Noise Block Down Converter
RID Remote Identification
SAS Set of Aloha Slots
SRS Set of Registration Slots
Appendix G. ECM (ENTRY
CHANNEL MODE)
Comments
ASR is a private protocol used by the CDM-840 to
request bandwidth from the VMS.
The BUC is used in the Tx (uplink) of satellite signals
to convert a band of frequencies from a lower
frequency to a higher frequency.
CDRP is used to simplify the deployment of Comtech
EF Data's Advanced VSAT solution in an IP-routed
network.
dSCPC is a Comtech EF Data FAST Feature used to
enable dynamic allocation and sharing of bandwidth
among users.
The HCC is a dedicated CDD-880 that generates the
TAP and is responsible for all request transactions
from each CDM-840 while in Entry Channel Mode.
The LNB is the receiving device on a parabolic
satellite dish used for the Rx (downlink) of satellite
signals
The RID is a message, presented to the Hub Channel
Controller upon each transmission into the Aloha
channel, which contains the IP Address and control
flag.
SAS is used as random access for initial request
messaging from the CDM-840s.
SRS is used for time sensitive management message
transactions.
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