Internet DRAFT - draft-brown-supplpkgs
draft-brown-supplpkgs
Media Gateway Control C. Michael Brown
Keven Chapman
Kevin Boyle
Internet Draft Nortel Networks
Document: draft-brown-supplpkgs-00.txt March 2000
Category: Informational
Supplemental Packages for Megaco/H.248
Status of this Memo
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026 [1].
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1. Abstract
This document provides proposed definitions for several supplemental
packages for Megaco/H.248. These packages address support of
functionality for basic and enhanced telephony services, and PSTN
Per Trunk Signaling (PTS).
2. Conventions used in this document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in
this document are to be interpreted as described in RFC-2119 [2].
3. Telephony services package definitions
3.1 Expanded Call Progress Tones Generator Package
PackageID: xcg
Version: 1
Extends: cg version 1
Supplemental Packages for Megaco/H.248 March 2000
This package defines additional call progress indications as
signals.
Properties
None.
Events
None.
Signals
Comfort Tone
SignaID: cmft
Generate comfort tone, to indicate that the call is still in the
process of being connected. The physical characteristic of comfort
tone is available in the gateway.
Signal Type: Timeout
Duration: Provisioned
Additional Parameters: None
Off-Hook Warning Tone
SignaID: roh
Generate receiver off-hook warning tone, to urge the customer to
replace the receiver on the cradle. The physical characteristic of
roh tone is available in the gateway.
Signal Type: Timeout
Duration: Provisioned
Additional Parameters: None
Negative Acknowledgement
SignaID: nack
Signal negative acknowledgement. The physical characteristic of
nack tone is available in the gateway.
Signal Type: Timeout
Duration: Provisioned
Additional Parameters: None
Vacant Number Tone
SignaID: vac
Signal that the number dialed routes to a non-existent address. The
physical characteristic of vacant tone is available in the gateway.
Signal Type: Timeout
Duration: Provisioned
Additional Parameters: None
Statistics
None.
Procedures
None.
3.2 Enhanced Alerting Package
PackageID: alert
Supplemental Packages for Megaco/H.248 March 2000
Version: 1
Extends:
This package defines enhanced alerting signals for an analog line.
Properties
None.
Events
None.
Signals
Ring
SignalID: ri
Applies ringing to the line.
Signal Type: TimeOut
Duration: Provisioned
Additional Parameters:
Pattern
ParameterID: pattern
Type: Enumeration
Possible Values: 1, 2, 3, 4
The pattern is an abstract indication of the distinctive alerting
pattern that will be applied to the line. The alert/ri pattern
parameter has a direct mapping to the alert/cw pattern parameter and
the alert/cid pattern parameter. The actual cadence/frequency
combination is available in the gateway. The default is pattern 1,
which indicates the default alerting style. Ring patterns repeat
until the signal times out, or is interrupted.
Ringsplash
SignalID: rs
Applies ringsplash to the line.
Signal Type: Brief
Duration: 500 milliseconds
Additional Parameters: None.
Call Waiting
SignaID: cw
Generate call waiting indication to the user. The cw signal
definition takes a pattern parameter, to allow generation of
distinctive waiting tones.
Signal Type: Brief
Duration: Varies by pattern.
Additional Parameters:
Pattern
ParameterID: pattern
Type: Enumeration
Possible Values: 1, 2, 3, 4
The pattern is an abstract indication of the distinctive alerting
pattern that will be applied to the line. The cw pattern parameter
has a direct mapping to the ri pattern parameter and the cid pattern
parameter. The actual cadence/frequency combination is available in
Supplemental Packages for Megaco/H.248 March 2000
the gateway. The default is pattern 1, which indicates the default
alerting style. Call wait patterns do not repeat.
Caller Identification
SignalID: cid
Sends the date, caller's name and caller's number to the CPE
display, if the set is so equipped. Caller ID is unique in that it
must be applied during alerting -- either power ringing, or call
waiting. Therefore, this signal implies alerting, which will be
appropriately applied to the CPE by the gateway, based upon the on-
hook/off-hook status of the line.
Signal Type: Brief
Duration: Variable
Additional Parameters:
CID Data Block
ParameterID: cdb
Type: String
Possible Values: See description.
The CID Data Block contains the hex message data to be sent to the
set. For example, in North America, this would be the SDMF or MDMF
construct. The default value is an empty data block, which will be
discarded by the gateway.
Pattern
ParameterID: pattern
Type: Enumeration
Possible Values: 1, 2, 3, 4
The pattern is an abstract indication of the distinve alerting
pattern that will be applied to the line. The cid pattern parameter
maps to the ri pattern parameter for on-hook signalling, and to the
cw pattern parameter for off-hook signalling. The default is
pattern 1, which indicates the default alerting style.
Statistics
None.
Procedures
None.
3.3 Basic Services Tones Generation Package
PackageID: srvtn
Version: 1
Extends: cg version 1
This package defines signals for use by various telephony services.
Properties
None.
Events
Events are defined as in this package for the signals.
Supplemental Packages for Megaco/H.248 March 2000
Signals
Recall Dial Tone
SignalID: rdt
Generate recall dial tone. The physical characteristic of recall
dial tone is available in the gateway.
Signal Type: Timeout
Duration: Provisioned
Additional Parameters: None
Confirmation Tone
SignalID: conf
Generate confirmation tone. The physical characteristic of
confirmation tone is available in the gateway.
Signal Type: Brief
Duration: N/A
Additional Parameters: None
Held tone
SignalID: ht
Generate held tone. The physical characteristic of held tone is
available in the gateway.
Signal Type: Timeout
Duration: Provisioned
Additional Parameters: None
Statistics
None.
Procedures
None.
4. PSTN Trunking Packages
4.1 Robbed Bit Signalling Package
PackageID: rbs
Version: 1
Extends:
Properties
Wink Duration
PropertyID: wkdur
Defines wink duration in milliseconds.
Type: Integer
Possible Values:
Generation: >=140 and <= 290
Detection: >= 100 and <= 350
Defined In: LocalDescriptor
Characteristics: Global Read/Write
Delay Dial Duration
Supplemental Packages for Megaco/H.248 March 2000
PropertyID: dddur (0x0041)
Defines delay dial duration in milliseconds.
Type: Integer
Possible Values:
Generation: >=140
Detection: >= 100
Defined In: LocalDescriptor
Characteristics: Global Read/Write
Events
Seize
EventID: sz
Gateway detects and reports off-hook.
EventsDescriptor Parameters: None.
ObservedEventsDescriptor Parameters: None.
Start Signal
EventID: ss
Gateway detects and reports a timed transition from on-hook to off-
hook (leading edge) and off-hook to on-hook (trailing edge). Start
Signal type is provisioned on a termination basis.
EventsDescriptor Parameters: None.
ObservedEventsDescriptor Parameters: None.
Wink
EventID: wk
Gateway detects and reports a timed transition from on-hook to off-
hook (leading edge) and off-hook to on-hook (trailing edge) for ANI
request and wink start signal, and off-hook to on-hook (leading
edge) and on-hook to off-hook (trailing edge) for Multi-Wink and
Inband/Enhanced Inband Signalling.
EventsDescriptor Parameters: None.
ObservedEventsDescriptor Parameters: None.
Answer
EventID: an
Gateway detects and reports off-hook.
EventsDescriptor Parameters: None.
ObservedEventsDescriptor Parameters: None.
Unseize
EventID: us
Gateway detects and reports on-hook.
EventsDescriptor Parameters: None.
ObservedEventsDescriptor Parameters: None.
Signals
Seize
SignaID: sz
Gateway signals off-hook.
Signal Type: Brief
Duration: 140-150 milliseconds
Supplemental Packages for Megaco/H.248 March 2000
Additional Parameters: None
Start Signal
SignaID: ss
Gateway signals a timed transition from on-hook to off-hook (leading
edge) and off-hook to on-hook (trailing edge). Start Signal type
provisioned on a termination basis through package properties.
Signal Type: Brief
Duration: Defined by wkdur and dddur properties.
Additional Parameters: None
Wink
SignaID: wk
Gateway signals a timed transition from on-hook to off-hook (leading
edge) and off-hook to on-hook (trailing edge) for ANI request and
wink start signal, and off-hook to on-hook (leading edge) and on-
hook to off-hook (trailing edge) for Multi-Wink and Inband/Enhanced
Inband Signalling.
Signal Type: Brief
Duration: Defined by wkdur property.
Additional Parameters: None
Outpulse
SignaID: op
Gateway signals digits specified in digit register (dr) parameter.
Signal Completion Notification will be used to indicate, to MGC,
digit outpulsing to network has completed.
Signal Type: Brief
Duration: Variable depending on number of digits to outpulse.
Additional Parameters:
Digit Register
ParameterID: dr
Type: string
Possible Values: Each charater in the string is a digit
Contains the complete string of digits to be outpulsed.
Answer
SignaID: an
Gateway signals off-hook.
Signal Type: Brief
Duration: 140-150 milliseconds.
Additional Parameters: None
Unseize
SignaID: us
Gateway signals on-hook.
Signal Type: Brief
Duration: 140-150 milliseconds.
Additional Parameters: None
Procedures
None.
Supplemental Packages for Megaco/H.248 March 2000
4.2 Multi-Frequency Generation and Detection Package
PackageID: mfgd
Version: 1
Extends:
Properties
Signalling Type
PropertyID: sigtype
Defines signalling characteristics.
Type: Enumeration
Possible Values: MF
Defined In: LocalDescriptor
Characteristics: Global Read/Write
KP Duration
PropertyID: kpdur
Defines MF KP digit (and its variants) duration in milliseconds.
Type: Integer
Possible Values:
Generation: >=90 and <= 120
Detection: >= 55
Defined In: LocalDescriptor
Characteristics: Global Read/Write
MF and ST Duration
PropertyID: mfstdur
Defines MF digit and ST digit (and its variants) duration in
milliseconds.
Type: Integer
Possible Values:
Generation: >=58 and <= 75
Detection: >= 30
Defined In: LocalDescriptor
Characteristics: Global Read/Write
Interdigit Interval
PropertyID: idint
Defines MF digits interdigit interval duration in milliseconds.
Type: Integer
Possible Values:
Generation: >=58 and <= 75
Detection: >= 25
Defined In: LocalDescriptor
Characteristics: Global Read/Write
Events
MF 0
EventID: mf0
Gateway detects and reports Multi-Frequency digit _0_.
Supplemental Packages for Megaco/H.248 March 2000
EventsDescriptor Parameters: None.
ObservedEventsDescriptor Parameters: None.
The detection events for the other digits (1-9, A-F) are defined in
the same way. The A-F digits have the following mappings to ST and
KP digits:
mfa: None. mfa is an alternate expression for mf0.
mfb: KP3, ST3P.
mfc: KPP, STP.
mfd: KP, STKP.
mfe: KP2, ST2P.
mff: ST.
Digit Map Completion Event
EventID: ce
Signifies Digit Map criteria has been met. Note: Digit Map criteria
must have been specified via DigitMap Descriptor (e.g. [b-f]x.[b-f])
in order to receive this event. Example given defines the criteria
as being any KP variant followed by any number of digits 0 through 9
followed by any ST variant.
EventsDescriptor Parameters: None.
ObservedEventsDescriptor Parameters: Digit Register (DR) consisting
of MF digits reported to have met the specified Digit Map criteria.
Method (M) indication reason for observed event (e.g. Unambiguous
Match (UM), Partial Match (PM), Full Match (FM)).
Signals
MF 0
SignaID: mf0
Generate Multi-Frequency digit _0_.
Signal Type: Brief
Duration: >= 58 and <= 75 milliseconds..
Additional Parameters: None
The signals for the other MF digits (1-9, A-F) are defined in the
same fashion. The A-F digits have the following mappings to ST and
KP digits:
mfa: None. mfa is an alternate expression for mf0.
mfb: KP3, ST3P.
mfc: KPP, STP.
mfd: KP, STKP.
mfe: KP2, ST2P.
mff: ST.
The duration of the ST variants matches that of the 0-9 digits. The
duration of the KP variants shall be >= 90 milliseconds, and <= 120
milliseconds.
Statistics
None.
Procedures
None.
Supplemental Packages for Megaco/H.248 March 2000
5. Formal Syntax
Not Applicable
The following syntax specification uses the augmented Backus-Naur
Form (BNF) as described in RFC-2234 [3].
6. Security Considerations
Not Applicable
7. References
1 Bradner, S., "The Internet Standards Process -- Revision 3", BCP
9, RFC 2026, October 1996.
2 Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119, March 1997
3 Crocker, D. and Overell, P.(Editors), "Augmented BNF for Syntax
Specifications: ABNF", RFC 2234, Internet Mail Consortium and
Demon Internet Ltd., November 1997
8. Acknowledgments
9. Author's Addresses
C. Michael Brown
Nortel Networks
4008 Chapel Hill Road
Research Triangle Park, NC USA 27709
Phone: (919) 991-7767
Email: C.Michael.Brown@nortelnetworks.com
Keven Chapman
Nortel Networks
4008 Chapel Hill Road
Research Triangle Park, NC USA 27709
Phone: (919) 991-4785
Email: keven@americasm01.nt.com
Kevin Boyle
Supplemental Packages for Megaco/H.248 March 2000
Nortel Networks
4008 Chapel Hill Road
Research Triangle Park, NC USA 27709
Phone: (919) 991-2690
Email: kboyle@nortelnetworks.com>
Supplemental Packages for Megaco/H.248 March 2000
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