siemens isup presentation

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Ne 1198© Siemens AG ICN WN VC TV 31

ISDN USER PART (SS7 ISUP)

GENERAL

ITU-T ISUP Blue Book (1998) ETSI - ISUP V1

ITU-T ISUP Issue 1993 ETSI - ISUP V2



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ISDN USER PART (ISUP)

L3

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MTP

TUP ISUP

SCCP

TC

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Octet Type Label SIO Flag

Signalling Information Field (SIF) Address Portion

• Suitable for Basic Call Set-Up in the ISDN and PSTN

• Full Set of Supplementary Services

• Flexible syntax, i.e. compatibility with other ITU-T Issues is given.

• Evolution possible (ISUP BB, ISUP 93, ISP 97, ISUP 2000 ...)

GENERAL CHARACTERISTICS OF ISUP

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USE OF SCCP WITHIN ISUP (END TO END SIGNALLING)

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MTP

TUP ISUP

SCCP

TC

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EVOLUTION OF ISUP

Yellow Book Red Book Blue Book

CCITT ITU-T

1980 1984 1988 1992

First version including procedures for basic call (w/o Supplementary Services)

ISUP definition in 1TR7, including

Supplementary Services

Definition of TUP+ by the Quadripartite Group as interim solution for the international inter- connections for the

European ISDN

Enhancements including procedures for a min. set of Supplementary Services

Approval of ETSIclarifications for internationalconnections (Q.767)

Memorandum ofUnderstanding

ETSI clarifications forISDN (ETSI V1)

Enhancements regarding the basic call as well as

the SupplementaryServices

Inclusion of Generic functions

ISUP 93 ETSI V2 ISUP 97 ETSI V3 ISUP 2000 ETSI V4

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GENERAL MODELLING METHODS FOR THE ISDN

Stage 1Service Aspects

Stage 2Functional Network Aspects

Stage 3Network Implementation Aspects

Service DescriptionRec.'s I.2XX

Detailed DescriptionsRec.’s Q.8X.X

S.S. No. 7Rec.’s Q,7XX

Inter WorkingRec.’s Q.6XX

DSS 1Rec.’ s Q.93X

Only if relevent for NNI

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STANDARDS ACCORDING TO ETSI

Options

BasicFunctions

Unst

ab

leStandard

ITU-T RECOMMENDATION ETSI STANDARD

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ISUP OVERVIEW OF ITU-T Rec.’s (ISUP 2000)

• Functional description Q.761 *• General function of messages and signalsQ.762 *• Formats and codes Q.763 *• Cause Values Q.850 *• Procedures Q.764 *• Application Transport Mechanisms Q.765• Support of Terminal Portability Q.769• Support of Supplementary Services Q.73X

* Also Q.767 after clarification of ETSI (ETS 300 121-1)

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ISUP MESSAGES AND PARAMETER

Routing label

Circuit identification code

Message type code

Mandatory fixed part

Mandatory variable part

Optional part

Figure 1/Q.763

• 50 Messages Types• 100 Parameter Types• 160 Indicators• Min Set (= BB)

• Messages of variable

length• MTP supports max. 272

Octets

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TUP ISUP BB (88)

Q.767

SCCP

TC

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ISUP BASIC SUCCESSFULL CALL (1/5)

RLC

O D

IAM

ACM

ANM

REL

Basic call Typical indicators within IAM

• Satellite indicator• Continuity check indicator• Echo control device indicator• Transmission medium requirement• Protocol control indicator (PCI) *• ISDN user part preference indicator• ISDN access indicator• Calling party’s category• Called party number• Calling party number

* PCI = End to End Method, IW, Use of ISUP

(No. Plan, NADI)

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RLC

O D

IAM

ACM

ANM

REL

Basic call Typical indicators within ACM

• Charge indicator• Called party’s status indicator• Called party’s category indicator• Protocol control indicator (PCI) *• ISDN access indicator• Echo control device indicator

* PCI = End to End Method, IW, Use of ISUP

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RLC

O D

IAM

ACM

ANM

REL

Basic call Typical indicators within ANM

• Charge indicator *• Called party’s status indicator *• Called party’s category indicator *• Protocol control indicator (PCI) *• ISDN access indicator *• Echo control device indicator *

* Optional

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RLC

O D

IAM

ACM

ANM

REL

Basic call Typical indicators within REL

• Causes:

- Location- Normal events- Resource unavailable- Service option not available- Service option not implemented- Protocol error

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RLC

O D

IAM

ACM

ANM

REL

Basic call Typical indicators within RLC

• None

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INHERENT FAUL INDICATION

• Transmission alarm handling for digital inter-exchange circuits• Continuity check (automatic procedure)• Blocking and unblocking of circuits and circuit groups• Automatic repeat attempt

X

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CIRCUIT IDENTIFICATION CODE (CIC)

Exchange (O)

SS7 Equipment

Exchange (D)

SS7 Equipment

CIC SLS OPC DPC

LabelSIF

• Continuity Check (manual procedure)• Unequipped circuit identification code

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HANDLING OF DUAL SEIZURE

Method 1 Method 2

IAM

fifo

fifolafo

lafo

• Opposite order of selection • Priority access to a circuit group

P

P

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LOSS OF MEMORY

??

• Reset of circuits and circuit groups• Circuit group query

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EN BLOCK AND/OR OVERLAP ADDRESS SIGNALLING

LE

TE

ISUP

ISUPISUPTE

CAS

• Open or closed Numbering• Interworking with CAS

LE

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HANDLING OF UNKNOWN INFORMATION

LE LE

TETE

• Use of default values• Discard• Reset to 0

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MTP PAUSE AND RESUME

MTP

ISUP

X

• Set-up of new connections not possible• Treatment of ongoing calls ?

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FORWARD TRANSFER

?!FOT

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OVERLENGTH MESSAGES

LE

TE

IAMParameter Reference Type

Length(octets)

Message type

Nature of connection indicators

Forward call indicators

Calling party's category

Transmission medium requirement

Called party number

Calling party number

Optional forward call indicators

Closed user group interlock code

User-to-user information

Access transport

User service information

End of optional parameters

2.1

3.23

3.20

3.9

3.35

3.7

3.8

3.25

3.13

3.38

3.2

3.36

3.17

F

F

F

F

F

V

O

O

O

O

O

O

O

1

1

2

1

1

4-11

4-12

3

6

3-131

3-?

4-13

1

IAM

Content of IAM > 272 Bytes ? Discard optional Parameters

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SIGNALLING CONGESTION CONTROL

TFC

T29 = 0.3 -0.6 sec.T30 = 5 - 10 sec

MTP

ISUP

CIP

T29

T30

Traffic decrease, restart of T29 and T30

CIP

CIPTraffic increase, restart of T30

STP

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AUTOMATIC CONGESTION CONTROL

RLC

O D

IAM

ACM

ANM

REL

Basic call Automatic congestion level parameter within REL

• Congestion level 1 exceeded

• Congestion level 2 exceeded

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ISUP BLUE BOOK / Q.767, BASIC CALL (1/3)

Speech/3.1 kHz audio V 6.2

64 kbit/s unrestricted V 6.2

Nx64 kbit/s connection types ---

En-bloc address signalling V 6.2

Overlap address signalling V 6.2

Transit network selection V 11

Continuity check V 6.2

Forward transfer V 6.2

Tones and announcements V 6.2

Suspend and resume V 6.2

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Simplified echo control signalling procedures

V 6.2

Automatic repeat attempt

V 6.2

Blocking and unblocking of circuits and circuit groups

V 6.2 Circuit group query

V 9

Dual seizure V 6.2

Transmission alarm handling for digital inter-exchange circuits

V 6.2

Reset of circuits and circuit groups

V 6.2

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Receipt of unreasonable or unknown signalling information

V 6.2

Temporary trunk blocking ---

ISDN user part signalling congestion control V

6.2

Automatic congestion control V 6.2

Unequipped circuit identification code V 14

MTP pause and resume V 6.2

Overlength messages V 6.2

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ISUP BLUE BOOK / Q.767, SUPPLEMENTARY SERVICES

Direct-dialling-in (DDI) V 6.2Multiple subscriber number (MSN) V 6.2Calling line identification presentation (CLIP) V 6.2Calling line identification restriction (CLIR) V 6.2Connected line identification presentation (COLP) V 6.2Connected line identification restriction (COLR) V 6.2Terminal portability (TP) V 6.2Sub-addressing (SUB) V 6.2Call forwarding busy (CFB) V 6.2Call forwarding no reply (CFNR) V 6.2Call forwarding unconditional (CFU) V 6.2Closed user group (CUG) V 6.2User-to-user signalling 1 implicit (UUS 1) V 6.2

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ISUP PROPRIETARY ADDITIONS (EWSD V 6.2 and V 7.1)

Use of charging message with charge band parameter

V 6.2

National adaptations for MCID with or with out Holding

V 6.2

Trunk offering procedures for national operator V

6.2

Generic Notification based on ISUP 93 V

7.1

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TUP ISUP 93

SCCP

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SIMPLE SEGMENTATION

O D

IAM

SGM

Basic call

Parameter Reference TypeLength(octets)

Message type

Nature of connection indicators

Forward call indicators

Calling party's category

Transmission medium requirement

Called party number

Calling party number

Optional forward call indicators

Closed user group interlock code

User-to-user information

Access transport

User service information

End of optional parameters

2.1

3.23

3.20

3.9

3.35

3.7

3.8

3.25

3.13

3.38

3.2

3.36

3.17

F

F

F

F

F

V

O

O

O

O

O

O

O

1

1

2

1

1

4-11

4-12

3

6

3-131

3-?

4-13

1

Content of IAM > 272 Bytes ? Use of SGM (max 544Bytes)

Also possible for:

• ACM• ANM• CPG• CON

SGM May include the following parameter:

• Access transport• User to user information• Generic digits• Generic notification• Generic Number

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USER PART AVAILBILITY CONTROL

MTP

ISUP

MTP

ISUPX

UPU (MTP)

*)

*) Status Primitive with the cause “User part unavailability, inaccessible or unequipped remote user”

UPT (ISUP)

UPU (MTP) or UPA (ISUP)

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FALL BACK CAPABILITY

RLC

O D

IAM

ACM

ANM

REL

Basic call Use of parameters

In forward direction (IAM):

• Transmission medium requirement (preferred)

• Transmission medium requirement prime (fall back)

In backward direction

• Transmission medium used

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• Definition of a common Information subset• Inclusion of instructions for all other information

COMPATIBILITY PROCEDURES

LE LE

TETE

Protocol Transparency in case of Multi Vendor Environment

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BASIC CALL `s ISUP BB / Q.767 ISUP 93

Multirate connection types ---

Simple segmentation V 8.1

User part availability control ---

Access delivery information V 8.1

Signalling procedures for connection type allowing fallback capability V 8.1

Propagation delay determination procedure V 8.1

Enhanced echo control signalling procedures ---

Compatibility procedure V 8.1

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ISUP 93, GENERIC PROCEDURE

Generic number transfer V

7.1

Generic digit transfer ! V 13

Generic notification procedure V 7.1

Service activation V

14

Remote operations service (ROSE) capability

V 13

Network specific facilities ---

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SUPL. SERVICES `s ISUP BB / Q.767 ISUP 93

Malicious Call Identification (MCID) V9Call deflection (CD) V 10Explicit call transfer (ECT) V 12Call waiting (CW) V 7.1Call hold (HOLD) V 7.1Conference calling (CONF) V 7.1 Three party service (3PTY) V 7.1Multi-level precedence and pre-emption (MLPP) V 14User-to-user signalling 1 explicit (UUS 1) V 9User-to-user signalling 2 V 9User-to-user signalling 3 V 9

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PROPRIETARY ADDITIONS `s EWSD V 8 to V 10

Extended charging message with charge band parameter for IN

V 9

Customer depending routing V 9

Completion of Calls on Busy (CCBS) according to ETSI

V 9

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TUP ISUP 97

SCCP

TC

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INTERACTION BETWEEN N-ISDN AND INAP

SMPX.25

SCP

SCEP

TESSP

TESSP

TESSP

LEO LED

IAM(0800 696969)

IDP(080 696969)

CON *XYZ MCDU

IAM *XYZ MCDU IAM *

XYZ MCDU

INAP

ISUP

XYZ MCDU (0800 696969)

IAM (XYZ MCDU)

REL

*) Interaction Indicator

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BASIC CALL `s ISUP 93 ISUP 97

Interaction between N-ISDN and INAP V 11

Temporary alternative routing (TAR)

---

Hop counter procedure V 12

Collect call request procedures

---

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GENERIC PROCEDURES `s ISUP 93 ISUP 97

Application transport mechanism ! V

12

Pre-release information transport ---

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SUPL. SERVICES `s ISUP 93 ISUP 97

Completion of calls on Busy (CCBS)

V 8

Global virtual network service (GVNS)

V 9

International telecommunication charge card (ITCC)

---

Reverse charging (REV) V 13

Message waiting indication (MWI)

V 13

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ISUP 97, ADDITIONAL FUNCTIONS/SERVICES

Support of VPN applications with PSS1 Information Flow

---

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PROPRIETARY ADDITIONS `s EWSD V 11 to V 14

Tarif information based on application transport mechanisms V

12

Multi operator charging according to ETSI Technical Report V

13

Interaction of CCBS to simple IN Services V 12

Prevention of tromboning in case of ETC V 13

Call completion on no reply (CCNR) according to ETSI

V12

Support of Q-Sig. ! V 11

Support of area wide CENTREX V 11

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TUP ISUP 2000

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`s ISUP 97 ISUP 2000

BASIC CALL• Hard to reach• Calling Geodetic location procedure

GENERIC SIGNALLING PROCEDURES• Redirection• Pivot Routing

SUPPLEMENTARY SEVICES• Completion of Calls on No Reply (CCNR)

V 12

ADDITIONAL FUNCTIONS/SERVICES• Support of Number Portability (NP)

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