Access Network Interconnection (ANI)and Service Flows

| © Omantel 20172

Abstract

• To formulate a document that enlist important requirements involve in establishing interconnect with a new operator.

• To identify service flows

| © Omantel 20173

Contents

• Omantel Network

• Connectivity with RP

• Requirements for Interconnection

• Terminated Call Flows

| © Omantel 20174

Overview of the Omantel network

Fixed: POTS, ISDN, SIP, and TDM/IP business trunks are the considered fixed subscribers, they are running through NGN or IMS(VoBB) network.

Mobile: 2G/3G/4G subscribers are considered as mobile users, they are running through CS or IMS (VoLTE) network.

Omantel IMS network is based on fixed mobile convergence (FMC); this infer VoLTE and VoBB networks shares a common IMS core.

NGN

CS

IMS

| © Omantel 20175

Connectivity with RP

RP is connected with Omantel Fixed (NGN) as well as Omantel Mobile (CS) network.

As per agreed, RP traffic destined for Omantel fixed are dispatch at NGN.

Similarly, RP traffic destined for Omantel mobile are dispatched at CS.

For IMS, there doesn’t exit direct interworking with RP; IMS bound traffic from RP are dispatched to CS and NGN, and then it flows internally to reach IMS. MSAN

TCC QURUMSALALAH

TCC

SUWAIQ

QURUM

SOHARWATAYA SALALAH

SUR IBRI

AZAIBA

NIZWA

RP Mobile RP Fixed

| © Omantel 20176

Requirements for SS7 InterconnectionParameters Values (Example)Network Indicator National / InternationalDPC 12ABOPC AB12Linkset Selection Mask B1111 / B0000Signaling Specification ITU-T / ANSISignaling Link Circuit 16, 48, etcLink PriorityGroup Direction Incoming /Outgoing/ Bi-DirectionalCircuit Type ISUP/TUPCaller NOA National / International

Transmission Capabilities

Voice ServicesUnrestricted Digital Information ServiceRestricted Digital Information Service3.1kHz audio Services

Unrestricted Digital Information Service with Signal ToneVideo ServiceDefault All

Audio Codec Prefer G.711Codec List G.711, G.723, G.729, AMR, etcStart CIC 0End CIC 1048

Controlling Flag of Start Circuit Slave, Master, Automatic

| © Omantel 20177

Terminated Call Flows to Fixed Subscribers

a. Calls to POTS / BRA / SIP users

b. Calls to SIP PBX

c. Calls to TDM PBX

d. Calls to VoBB Users

| © Omantel 20178

a) Calls to POTS/BRA/SIP subscribers

UMG8900

TCC

QURUM

SOFTX3000

SALALAH

MSAN

OLT

Calls to POTS/ BRA

Calls to SIP

RP Mobile

RP Fixed

| © Omantel 20179

a) Calls to SIP PBX

UMG8900

TCC

QURUM

SOFTX3000

SALALAH

Calls to SIP PBX

SBC RP Mobile

RP Fixed

| © Omantel 201710

a) Calls to TDM PBX

UMG8900

TCC

QURUM

SOFTX3000

SALALAH

Calls to SIP PBX

MSAN

RP Mobile

RP Fixed

| © Omantel 201711

a) Calls to Legacy Exchange Subcriber

UMG8900

TCC

QURUM

SOFTX3000

Legacy-LXB

SALALAH Legacy-LXA

RP Fixed RP Mobile

| © Omantel 201712

a) Calls to VoBB users

TCC

QURUM

SALALAH

CSCF

AGCF

MGCF

Omantel IMS

RP FixedRP Mobile

| © Omantel 201713

Terminated Calls to Mobile Subscriber

a. Calls to 2G/3G Subscriber

b. Calls to VoLTE Subscriber

c. Calls to Rich Communication Services (Conference, MVaaS, IP-Centrex, etc)

| © Omantel 201714

Calls to 2G/3G Subscriber

NIZWA

AZAIBA

TCC

SUWAIQ

QURUM

SOHAR

WATAYA

SALALAHSUR

IBRI

MSS01

MSS02

MSS03

Calls to 2G Subscriber

Calls to 3G Subscriber

RP Mobile

RP Fixed

| © Omantel 201715

Calls to VoLTE Subscriber

NIZWA

AZAIBA

TCC

SUWAIQ

QURUM

SOHAR

WATAYA

SALALAHSUR

IBRI

MSS01

MSS02

MSS03

Omantel IMS

MGCF

SCSCF

PCSCF

S-GW/P-GW

RP Mobile

RP Fixed