Grandstream Networks GXW-410xv Manuel D’Utilisation

MTU  A Maximum Transmission Unit (MTU) is the largest size 

packet

 or 

frame

, specified in 

octet

s (eight-

t. The maximum for 

thernet is 1500 byte. 

AT  Network Address Translation 

bit bytes), that can be sent in a packet- or frame-based network such as the Interne
E
 
N
 
NTP  Network Time Protocol, a protocol to exchange and synchronize time over networks The port used 
is UDP 123 Grandstream products using NTP to get time from Internet 
 
OBP/SBC  Outbound Proxy or another name Session Border Controller. A device used in 

VoIP

 networks.

OBP/SBCs are put into the signaling and media path between calling and called party. The OBP/SBC 
acts as if it was the called VoIP phone and places a second call to the called party. The effect of this 
behavior is that not only the signaling traffic, but also the media traffic (voice, video etc) crosses the 
OBP/SBC. Without an OBP/SBC, the media traffic travels directly between the VoIP phones. Private 
OBP/SBCs are used along with 

 

firewalls

 to enable VoIP calls to and from a protected enterprise ne

Public VoIP service providers use OBP/SBCs to allow the use of VoIP protocols from private networks 
with 

twork. 

internet

 connections using 

NAT

. 

 
PPPoE  Point-to-Point Protocol over Ethernet is a network protocol for encapsulating PPP frames in 
Ethernet frames. It is used mainly with cable modem and DSL services. 
 
PSTN  Public Switched Telephone Network.  The phone service we use for every ordinary phone call, or 

port Control Protocol, defined in 

RFC 3550

called POT (Plain Old Telephone), or circuit switched network. 
 
RTCP  Real-time Trans

, a sister protocol of the 

Real-time 

Transport Protocol

 (RTP), It partners RTP in the delivery and packaging of multimedia data, but does not 

riodically to transmit control packets to participants in a streaming 

ultimedia session. The primary function of RTCP is to provide feedback on the quality of service being 

TP  Real-time Transport Protocol defines a standardized packet format for delivering audio and video 

transport any data itself. It is used pe
m
provided by RTP. 
 
R
over the Internet. It was developed by the Audio-Video Transport Working Group of the 

 and first 

published in 1996 as 

 
SDP  Session Description Protocol is a format for describing 

 initialization parameter

has been published by the 

s. It 

 2327. 

 
SIP  Session Initiation Protocol, An IP telephony signaling protocol developed by the IETF (RFC3261). 
SIP is a text-based protocol suitable for integrated voice-data applications. SIP is designed for voice 

ansmission and uses fewer resources and is considerably less complex than H.323.  All Grandstream 

TUN  Simple Traversal of UDP over NATs is a 

network protocol

tr
products are SIP based 
 
S

 allowing clients behind 

NAT

 (or multiple 

et up UDP communication between two 

osts that are both behind NAT routers. The protocol is defined in 

RFC 3489

NATs) to find out its public address, the type of NAT it is behind and the internet side port associated by 
the NAT with a particular local port. This information is used to s
h

. STUN will usually work well 

with non-symmetric NAT routers. 
 
TCP  Transmission Control Protocol is one of the core protocols of the 

. Using TCP

applications on networked hosts can create connections to one another, over which they can exchange 
data or 

, 

. The protocol guarantees reliable and in-order delivery of sender to receiver data. 

 
TFTP  Trivial File Transfer Protocol, is a very simple 

 transfer 

basic form of 

Grandstream Networks, Inc. 

GXW-410xv User’s Manual 

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