SEF

Severely Errored Frames is the incoming signal has at least four consecutive errored

 

framing patterns.

SES

Severely Errored Seconds is the seconds during which more than 2,500 bipolar errors

 

are detected on the line.

session

The time during which two computers maintain a communication connection. An

 

example is a connection configured between the Megabit Modem 400F and the

 

service provider.

SNMP

Simple Network Management Protocol is a protocol that specifies how to send

 

information between a NMS and managed devices on a network. The managed

 

devices run a program called an agent. The agent interprets SNMP request and

 

responds to them. SNMP is used to set device configurations, read device

 

configurations or read the device status.

Spanning Tree

A bridging protocol that detects and prevents loops from occurring in a system

 

containing multiple bridges.

subnet mask

A type of IP address that allows a site to use a single IP address for multiple physical

 

networks.

TCP

Transmission Control Protocol is a transport protocol used to map inbound traffic

 

(from a remote IP address) to an internal (LAN) IP address. Establishes connection

 

with remote user before data transmission.

TCP/IP

Transmission Control Protocol/Internet Protocol is a protocol used for

 

communications between computers over networks and the internet.

TFTP

Trivial File Transfer Protocol is a protocol used to download card images or other files

 

from an external TFTP server to the NVRAM of any installed cards, or to upload files

 

from an installed card to an external TFTP server.

trap receivers

PCs configured to receive SNMP traps (messages).

traps

Autonomous, interrupt-driven, SNMP messages sent from a managed node to a

 

network management station to indicate that an event has occurred.

UAS

UnAvailable Seconds is the number of seconds during which the line is unavailable.

UBR

Unspecified Bit Rate is an ATM traffic type used for LAN traffic. When network

 

congestion occurs, the data is stored in a buffer until it can be sent.

UDP

User Datagram Protocol is a transport protocol used to map inbound traffic (from a

 

remote IP address) to an internal (LAN) IP address. Uses a protocol port number for

 

the destination at the remote location.

upstream traffic

Communications from a user to a service provider.

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Megabit Modem 400F User Manual