SS II komplet_2011-2012.pdf
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Connectivity Layer<br />

Network Assurance<br />

Network Provisioning<br />

Network & Services<br />

Management<br />

User and Service<br />

Management<br />

Charging<br />

Mediation<br />

DNS / ENUM<br />

TDM<br />

MGCF/SG<br />

ISUP<br />

PSTN/PLMN<br />

Multimedia Telephony<br />

Services<br />

SIP<br />

ISUP<br />

MG<br />

H.248<br />

RTP<br />

RTP<br />

ICS<br />

CSCF<br />

SIP<br />

A-SBG<br />

SIP<br />

SIP<br />

Diameter<br />

SIP<br />

IP Backbone<br />

Presence<br />

RTP<br />

RTP<br />

H<strong>SS</strong><br />

N-SBG<br />

SIP<br />

RTP<br />

Other<br />

operators<br />

SIP and<br />

H.323<br />

RTP<br />

SIP/H323<br />

Application<br />

Layer<br />

Control Layer<br />

Connectivity<br />

Layer<br />

SIP/H323<br />

› Access Session Border Gateway<br />

(A-SBG)<br />

– User-to-Network Interface (UNI)<br />

– Interfacing SIP and IP network<br />

› Network Session Border Gateway<br />

(N-SBG)<br />

– Network-to-network interface (NNI)<br />

– Handles inter-domain inter-working<br />

between SIP networks and SIP or<br />

H.323 networks<br />

› MGW – Media Gateway for break<br />

out calls to PSTN<br />

Matus Turcsany | © Ericsson AB 2010 | December <strong>2011</strong> | Page 37

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