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Telos Zephyr Xstream Two-Way Radio User Manual

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USER’S MANUAL

Section 11: THE WORKS – Detailed Menu Reference 225

Ethernet(SIP)andEthernet(RTP)

ThisselectionenablesZephyrXstream'sbuilt‐inEthernetinterfaceforaudio

codingand/ordecoding.Thisallowsfortransmissionandreceptionofaudio

overInternetProtocol(IP)basednetworks.



The(SIP)and(RTP)designationsrefertowhatprotocolisusedtoestablish

communication.SIP(SessionInitiationProtocol)con

nectionsarebi‐directional.

By‘dialing’anotherZephyrXstream,yourequestareturnfeedaswell.



RTP(Real‐timeTransportProtocol)isamono‐directional,‘pushonly’mode.

Whenyou‘dial’anotherZephyrXstreaminRTPmode,yousendaudiotothe

remotesite,butreceivenothinginreturnunlesstheremoteoperatormanuall

y

initiatesaconnectionbacktothestudio.

Appendix6coversthistopicindetail.



w

IMPORTANT!

The following menus will have different options when the Interface is set to Ethernet.

• CODEC

• DIAL

Prefix:

Thisnumberisappendedtothebeginningofeverynumberdialed.Usefulwhena"9"orother

digitisrequiredforaccess.

t

DEEP TECH NOTE!

Long Distance services that rely on "in-band" tones (i.e. DTMF) to convey password

information to the service provider cannot be accessed on Circuit Switched Data (Call type =

Zephyr) data calls.

This is because there is no audio path to send tones. Only if the network had an MPEG codec,

would it be able to "hear" the tones.

The entire call setup string is sent as digital information on the D channel.

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