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Telos Zephyr Xstream Two-Way Radio User Manual

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USER’S MANUAL

Appendix 6 – Special Operational Modes 319

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SIPPort(Default5060)

SIPusesaTCPport,asitscommunicationisbidirectional.TheSIPportis

whatisusedfortheconnectionprotocol,thatlayerthatinitiatesthe

twoRTPstreams.TheSIPportmustmatchonbothendsofa

connection.

UDPPort(Default9150)

RTPstreamsaresentan

dreceivedovertheUDPport.Thisportisused

forbothRTPandSIPmodes,asSIPnegotiatesthecreationofRTP

streams.TheUDPportmustmatchonbothendsofaconnection.

HTTPPort(Default8080)

TheTCPportusedforHTTPstreamingonly(normalweb‐pagesarealso

servedoverHTTP,bu

tthesearesentoverport80,theusualportto

whichawebbrowserconnects).AplayerwhichsupportsHTTPstreams

canconnectusingtheusualportnotation(e.g.

http://www.xxx.yyy.zzz:PORT).

Notethatpriorto3.0.1p,theZephyrXstreamusedport8000forHTTP

streaming.

TCPPo

rt(Default8800)Thisportiscurrentlyunused.

FIREWALLS AND ROUTERS

TheInternetworksbecausethereisacentralauthorityfordolingoutIPaddresses.Anygiven

connectiontotheinternetispermittedtousesomenumberofdesignatedaddresseswhichcan

beaccessedbyanymachinethatisalsoconnectedtotheIn

ternet.Mostconnectionsare

limitedtooneIP,withmanymoremachinesneedingaccesstothenetwork.Thisisthebasic

purposemostrouters.

Whenadevice,suchastheXstreamhasa"public"(e.g.real)IPaddressitcanbedirectly

accessedthrougharouter.However,ifthereisafir

ewall(whichmaybebuiltintotherouter,or

aseparatebox),ora"private"IPaddresstheunitisnotdirectlyaccessible.Inthesecasesthere

areafewoptions,asoutlinedbelow.

PortForwarding

Portforwardingisverysimple.Whenyouhavetwoconnectednetworks,with

differentnumberingschemes,theymustbeconn

ectedbyarouter.The

machinesoneithersideoftheroutercannotaccesseachother.Therouter

itselfcanbeaccessedbymachinesoneithernetwork,however.

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