NCC Field Name	ADI Field Name	Type/Unit	Example	Description
qualtime	qualtime	ms	20	Specifies the qualification time for bit changes.
waitbegintime	waitbegintime	ms	60	Specifies the delay before starting to play the forward and backward tones.
Outbound Timers
seizetime	seizetime	ms	400	Specifies the maximum time to receive the seizure acknowledge.
waitbacksignaltime	waitbacksignaltime	ms	4000	Specifies the maximum time to receive a backward request.
pausefrstdigittime	pausefrstdigittime	ms	300	Specifies the initial wait before dialing the first decadic pulse.
interdigittime	interdigittime	ms	750	Specifies the time between two trains of pulses while dialing with decadic pulses.
confirmanswertime	confirmanswertime	ms	275	Specifies the timeout for differentiating answer vs. ANI request which is the same line code but accompanied by a 500 Hz tone.
Inbound Timers
waitfrwdsignaltime	waitfrwdsignaltime	ms	350	Maximum time to receive a forward signal.
waitfrwddeksignaltime	waitfrwddeksignaltime	ms	40000	Maximum time to receive a decadic digit.
inbinterdigittime	inbinterdigittime	ms	400	Specifies the time to wait before deciding that a train of decadic pulses is over.
Inbound ANI Detector Timers
anitonetimeout	anitonetimeout	ms	100	Specifies the time to wait before deciding that the transmission of ANIs is over.
anirequesttimeout	anirequesttimeout	ms	1000	Specifies the timeout to get the first ANI.
answersignalontime	answersignalontime	ms	500	Specifies the duration of line signal AB-10 (answer) when requesting ANIs.
requestdelaytime	requestdelaytime	ms	100	Specifies the delay between A-12 and the ANI request line signal AB-10.
tonedelaytime	tonedelaytime	ms	150	Specifies the delay between signaling answer during the ANI request and sending the 500 Hz tone. Note: This value has been optimized for use within the Russian network. It should be decreased for back-to-back testing.
Dialing Control
toneontime	toneontime	ms	45	Specifies the duration of the MF tone used to convey DID information (backward and forward).
toneofftime	toneofftime	ms	45	Specifies the silence between the MF tones used to convey DID information (backward and forward) - also used for echo cancellation.
pulseontime	pulseontime	ms	50	Outbound: Specifies the time a pulse should be ON while dialing with decadic pulses.
pulseofftime	pulseofftime	ms	50	Outbound: Specifies the time a pulse should be OFF while dialing with decadic pulses.
anitoneontime	anitoneontime	ms	40	Outbound: Specifies the duration of the MF tone used to convey ANI information.
toneslevel	toneslevel	IDU	315	Specifies the amplitude of MF (call setup) tones (forward and backward).
anirequestontime	anirequestontime	ms	110	Specifies the duration of the 500 Hz tone during an ANI request.

(Page 1 of 1 in this chapter) Version

Chapter 18

System R1.5 Protocol

18.1 Introduction

18.2 Capability Mask

18.3 Signaling Overview

18.4 Parameters

: 18.4.1 Editable Parameters
: 18.4.2 Non-editable Parameters

18.5 Special TCP Behavior

: 18.5.1 Inbound Calls: Retrieving Digits All at Once
: 18.5.2 Inbound Calls: Recieving Digits One at a Time

18.1 Introduction

This chapter describes the System R1.5 (R15) signaling protocol and TCP parameters.
This chapter provides the following information: Overview of signaling performed by the System R 1.5 protocol, implemented by the R15 TCP. R15 TCP parameters. Operations specific to the R15 TCP within the framework of Natural Call Control.
The R15 TCPs implement a number of different protocols that are in use in the Russian telephone network. The protocols run on E1 trunks. Two separate TCPs are used for inbound and outbound calls, since the protocols' structure excludes the possibility of two-way trunks. They are named r150.tcp and r151.tcp. Separate call setup schemes are used for local and long distance calls as well; both TCPs support both schemes.

18.2 Capability Mask

With the NCC service, an application can call nccQueryCapability to determine the capabilities of a protocol. nccQueryCapability returns a capabilitymask.
For information about the capabilities supported for AG CAS protocols with NCC call control, refer to Appendix B.

18.3 Signaling Overview

The R1.5 protocols use two signaling bits per direction to control the state of calls. The bits used are the A and B bits. Line signaling is a combination of signaling bit variations and in-band tones.
Register signaling is usually performed by acknowledged MF tones. This means that the outbound equipment plays a forward tone (representing one of the address digits), and the inbound equipment requests the next tone by playing a backward MF tone. Both tones are timed, not compelled.
However, it is possible for the outbound to be requested to switch to decadic pulse dialing during setup of a call, since not all switches in the Russian networks are equipped with MF tone detectors.
MF-Pulse Shuttle protocol is the default register signaling for both inbound and outbound protocols and can be combined or replaced with some other types of register signaling.

18.4 Parameters

The R15 inbound and outbound TCPs are programmed for operation within different countries and networks by a number of TCP-specific parameters. These are stored within the parameter category NCC.X.ADI.ADI.R15.
Parameters in this category fall into two groups: Parameters that program TCP/host interaction, or that act on features not regulated or that can change from switch to switch within the same network. You can freely edit these parameters to suit your implementation. Parameters that are signaling-specific: changing their values invalidates approvals for the board, and may cause the board to malfunction. These parameters are described here for reference purposes only.

18.4.1 Editable Parameters

The following table describes NCC.X.ADI.R15 parameters (within the parameter category NCC.X.ADI.R15) that you may modify. Also listed are the equivalent ADI.R15 parameters, to assist with migration from ADI to NCC. NCC Field Name ADI Field Name Type/Unit Default Description DIDnumber DIDnumber number 7 Inbound. Specifies the number of incoming DID digits to expect. ANInumber ANInumber number 8 Inbound. Specifies the number of ANI digits to expect. If this parameter is set to 0, then the inbound protocol does not attempt to request the ANIs. If this parameter is set to any other number, the inbound protocol will request the ANIs, and will receive as many as the outbound side will provide. decadicsignalmethod optionflags (bit 0) mask 0x0 Set to 1 to do decadic dialing (for both inbound and outbound protocols). longdistanceinbound optionflags (bit 1) mask 0x0 Set to 1 for long distance inbound protocol. mustsendANI optionflags (bit 2) mask 0x0 Set to 1 to make the transmission of ANIs mandatory (relevant to the outbound protocol). mustgetANI optionflags (bit 3) mask 0x0 Set to 1 to make the reception of ANIs mandatory (relevant to the inbound protocol). waitingplaybusy optionflags (bit 4) mask 0x0 Set to 1 to play busy on timeout. waitingplayreorder optionflags (bit 5) mask 0x0 Set to 1 to play fast busy on timeout. waitingplaysilence optionflags (bit 6) mask 0x0 Set to 1 to play silence on timeout. longdistancedecadic optionflags (bit 9) mask 0x0 Reserved. switchtoDecadic optionflags (bit 10) mask 0x0 Reserved. sendANIsingledigit optionflags (bit 12) mask 0x0 Set to 1 to enable the detection of ANIs one at a time. The information will be presented in the form of an NCCEVN_PROTOCOL_EVENT with a value R15_ANI_DIGIT. The value of the digit may be retrieved by looking at the size field. firstcommand firstcommand number 1 Inbound. First command for inbound protocol. 1 Send first digit. 2 Send next digit. 3 Send previous digit. If the value is set to 2 or 3, make sure that DIDnumber is set to a correct value. anirequestattempts anirequestattempts number 3 Inbound. The parameter specifies the number of attempts to obtain ANIs. If the parameter is set to 0, no attempts will be made. When reception of ANIs is mandatory (bit 0x8 in optionflags is set) and no ANIs are received after the first attempt, this parameter can be used to perform additional ANI requests before clearing back. dialstartposition dialstartposition number 4 Outbound. The value of this parameter is used to define the starting position within a dial string; i.e, when the first request from the inbound side, defined by NCC.X.ADI.R15.firstcommand, is B2 (send next digit) or B3 (send the previous digit) the first DID that is presented by the outbound side is located in the NCC.X.ADI.R15.dialstartposition position.

NCC Field Name	ADI Field Name	Type/Unit	Default	Description
DIDnumber	DIDnumber	number	`7`	Inbound. Specifies the number of incoming DID digits to expect.
ANInumber	ANInumber	number	`8`	Inbound. Specifies the number of ANI digits to expect. If this parameter is set to 0, then the inbound protocol does not attempt to request the ANIs. If this parameter is set to any other number, the inbound protocol will request the ANIs, and will receive as many as the outbound side will provide.
decadicsignalmethod	optionflags (bit 0)	mask	0x0	Set to 1 `to do decadic dialing (for both inbound and outbound protocols).`
longdistanceinbound	optionflags (bit 1)	mask	0x0	Set to 1 `for long distance inbound protocol.`
mustsendANI	optionflags (bit 2)	mask	0x0	Set to 1 `to make the transmission of ANIs mandatory (relevant to the outbound protocol).`
mustgetANI	optionflags (bit 3)	mask	0x0	Set to 1 `to make the reception of ANIs mandatory (relevant to the inbound protocol).`
waitingplaybusy	optionflags (bit 4)	mask	0x0	Set to 1 `to play busy on timeout.`
waitingplayreorder	optionflags (bit 5)	mask	0x0	Set to 1 `to play fast busy on timeout.`
waitingplaysilence	optionflags (bit 6)	mask	0x0	Set to 1 `to play silence on timeout.`
longdistancedecadic	optionflags (bit 9)	mask	0x0	`Reserved.`
switchtoDecadic	optionflags (bit 10)	mask	0x0	`Reserved.`
sendANIsingledigit	optionflags (bit 12)	mask	0x0	Set to 1 `to enable the detection of ANIs one at a time. The information will be presented in the form of an` NCCEVN_PROTOCOL_EVENT `with a value` R15_ANI_DIGIT`. The value of the digit may be retrieved by looking at the` size `field.`
firstcommand	firstcommand	number	1	Inbound. First command for inbound protocol. `1` Send first digit. `2` Send next digit. `3` Send previous digit. If the value is set to 2 or 3, make sure that DIDnumber is set to a correct value.
anirequestattempts	anirequestattempts	number	3	Inbound. The parameter specifies the number of attempts to obtain ANIs. If the parameter is set to 0, no attempts will be made. When reception of ANIs is mandatory (bit `0x8` in optionflags is set) and no ANIs are received after the first attempt, this parameter can be used to perform additional ANI requests before clearing back.
dialstartposition	dialstartposition	number	4	Outbound. The value of this parameter is used to define the starting position within a dial string; i.e, when the first request from the inbound side, defined by NCC.X.ADI.R15.firstcommand, is B2 (send next digit) or B3 (send the previous digit) the first DID that is presented by the outbound side is located in the NCC.X.ADI.R15.dialstartposition position.

18.4.2 Non-editable Parameters

The following NCC.X.ADI.R15 parameters are country- or network-specific, and cannot be modified. Also listed are the equivalent ADI.R15 parameters, to assist with migration from ADI to NCC.

Caution:

Most of the parameters that follow are signaling-specific: changing their value will invalidate any approval certificate for the used board, and may cause the board to malfunction. These parameters are described here for reference purposes only.

NCC Field Name

ADI Field Name

Type/Unit

Example

Description

qualtime

qualtime

ms

20

Specifies the qualification time for bit changes.

waitbegintime

waitbegintime

ms

60

Specifies the delay before starting to play the forward and backward tones.

Outbound Timers

seizetime

seizetime

ms

400

Specifies the maximum time to receive the seizure acknowledge.

waitbacksignaltime

waitbacksignaltime

ms

4000

Specifies the maximum time to receive a backward request.

pausefrstdigittime

pausefrstdigittime

ms

300

Specifies the initial wait before dialing the first decadic pulse.

interdigittime

interdigittime

ms

750

Specifies the time between two trains of pulses while dialing with decadic pulses.

confirmanswertime

confirmanswertime

ms

275

Specifies the timeout for differentiating answer vs. ANI request which is the same line code but accompanied by a 500 Hz tone.

Inbound Timers

waitfrwdsignaltime

waitfrwdsignaltime

ms

350

Maximum time to receive a forward signal.

waitfrwddeksignaltime

waitfrwddeksignaltime

ms

40000

Maximum time to receive a decadic digit.

inbinterdigittime

inbinterdigittime

ms

400

Specifies the time to wait before deciding that a train of decadic pulses is over.

Inbound ANI Detector Timers

anitonetimeout

anitonetimeout

ms

100

Specifies the time to wait before deciding that the transmission of ANIs is over.

anirequesttimeout

anirequesttimeout

ms

1000

Specifies the timeout to get the first ANI.

answersignalontime

answersignalontime

ms

500

Specifies the duration of line signal AB-10 (answer) when requesting ANIs.

requestdelaytime

requestdelaytime

ms

100

Specifies the delay between A-12 and the ANI request line signal AB-10.

tonedelaytime

tonedelaytime

ms

150

Specifies the delay between signaling answer during the ANI request and sending the 500 Hz tone.
Note: This value has been optimized for use within the Russian network. It should be decreased for back-to-back testing.

Dialing Control

toneontime

toneontime

ms

45

Specifies the duration of the MF tone used to convey DID information (backward and forward).

toneofftime

toneofftime

ms

45

Specifies the silence between the MF tones used to convey DID information (backward and forward) - also used for echo cancellation.

pulseontime

pulseontime

ms

50

Outbound: Specifies the time a pulse should be ON while dialing with decadic pulses.

pulseofftime

pulseofftime

ms

50

Outbound: Specifies the time a pulse should be OFF while dialing with decadic pulses.

anitoneontime

anitoneontime

ms

40

Outbound: Specifies the duration of the MF tone used to convey ANI information.

toneslevel

toneslevel

IDU

315

Specifies the amplitude of MF (call setup) tones (forward and backward).

anirequestontime

anirequestontime

ms

110

Specifies the duration of the 500 Hz tone during an ANI request.
The following parameters are reserved for NMS internal use: alarmsonqualtime alarmsoffqualtime

*Caution:*	Most of the parameters that follow are signaling-specific: changing their value will invalidate any approval certificate for the used board, and may cause the board to malfunction. These parameters are described here for reference purposes only.

18.5 Special TCP Behavior

The following sections describe operations that are specific to the R15 TCPs within the framework of Natural Call Control.

18.5.1 Inbound Calls: Retrieving Digits All at Once

When the application receives the NCCEVN_INCOMING_CALL event, not all information regarding the inbound call is available. For local calls, the missing information is the caller's category and ANI digits. This is because the R1.5 local outbound protocol sends the category and ANI digits only after the call has been accepted by the inbound party. Thus the NCC_CALL_STATUS has only one relevant field that is filled if the application calls nccGetCallStatus after an NCCEVN_INCOMING_CALL event:

Field

Description

calledaddr

The called number. Also referred to as the Direct Inward Dial (DID) number.
If the application accepts the call, the TCP collects the caller's category and ANI digits. Once they are available, the application can receive an NCCEVN_CALL_STATUS_UPDATE with a value of NCC_CALL_STATUS_CALLINGADDR, or NCCEVN_EXTENDED_CALL_STATUS_UPDATE with a value of NCC_EXTENDED_CALL_STATUS_CATEGORY. Note: The reception of this event must be explicitly enabled before starting the protocol, by setting the NCC_REPORT_STATUSINFO bit in the NCC.START.eventmask parameter.
A subsequent call to nccGetCallStatus yields the following new field:

callingaddr The calling number (if available). Also referred to as the
Automatic Number Identification (ANI) number.
Another call to nccGetExtendedCallStatus yields the following new field:

usercategory The calling party category, e.g., normal subscriber, operator,
maintenance equipment.
Two NCC.X.ADI.R15 parameters affect the way the R15 TCPs accept and process digits: Parameter Description DIDnumber This parameter determines the number of Direct Inward Dial (DID) digits the TCP should expect from the calling party. Default is 7. ANInumber This parameter determines the number of ANI and category digits the TCP should expect from the calling party. For local inbound calls, if the parameter is set to 0, the ANI request will not be attempted; otherwise the TCP retrieves all the digits the calling party will send. This parameter is not relevant for long distance inbound calls.

Field	Description
calledaddr	The called number. Also referred to as the Direct Inward Dial (DID) number.

Parameter	Description
DIDnumber	This parameter determines the number of Direct Inward Dial (DID) digits the TCP should expect from the calling party. Default is 7.
ANInumber	This parameter determines the number of ANI and category digits the TCP should expect from the calling party. For local inbound calls, if the parameter is set to 0, the ANI request will not be attempted; otherwise the TCP retrieves all the digits the calling party will send. This parameter is not relevant for long distance inbound calls.

18.5.2 Inbound Calls: Recieving Digits One at a Time

The R15 TCP sends the incoming DID digits to the application one at a time in the following sequence:
d₁d_n
where n is determined by the NCC.X.ADI.R15.DIDnumber parameter.
If the application sets the NCC.X.ADI.sendanisingledigit parameter., the TCP also provides the ANI digits and the caller category as they arrive. This happens after the call is accepted by the application. Due to the working of the protocol, ANI digits may be: Reversed (last digit of the calling number first in sequence) Presented more than once, since the switch sends the category and ANI digits in a fast spill which can be repeated several times Note: ANI digits for the R1.5 protocol are presented through the NCCEVN_PROTOCOL event when the value is R15_ANI_DIGIT. The size field of the event structure contains the actual digit value.

(Page 1 of 1 in this chapter) Version

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