One document matched: draft-antti-sms-service-selector-00.txt
GSTN Address Service Selector "SMS"
<draft-antti-sms-service-selector-00.txt>
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Abstract
This document specifies a GSTN address service selector "SMS" which
is used to specify a telephone number (usually in a mobile phone
network) which is able to receive Short Messages, and two Service
Qualifiers to be used in conjunction with it.
This document contains IANA registration forms as an appendix.
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Table of Contents
1. Introduction ................................................ 3
1.1 GSTN Service Selector ...................................... 3
1.2 The "SMS" Service Selector ................................. 3
1.3 Convergence with the "gsm-sms" URL Scheme .................. 3
1.4 The "VIA" Service Qualifier ................................ 3
1.5 The "NET" Service Qualifier ................................ 3
1.6 Requirements ............................................... 4
2. Definitions ................................................. 4
2.1 Definition of the "SMS" Service Selector ................... 4
2.2 Definition of the "VIA" Service Qualifier .................. 4
2.3 Definition of the "NET" Service Qualifier .................. 5
3. References .................................................. 5
4. Security Considerations ..................................... 6
5. Authors' Addresses .......................................... 6
6. Full Copyright Statement .................................... 6
Appendix A. IANA Registration Templates ........................ 6
A.1 "SMS" Service Selector ..................................... 6
A.2 "VIA" Qualifier ............................................ 7
A.3 "NET" Qualifier ............................................ 8
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1. Introduction
1.1 GSTN Service Selector
[RFC2303] originally specified the way to insert GSTN (formerly PSTN)
telephone numbers in Internet email addresses. That document also
introduced the concept of a Service Selector, which specifies the
intended usage for the phone number. In that particular document, the
string "SMS" was given as an example of a Service Selector. However,
the syntax and meaning of that Service Selector was not documented.
This document tries to remedy that issue.
1.2 The "SMS" Service Selector
The "SMS" Service Selector identifies a phone number of a device
which is able to receive Short Messages. Short Messages are (often
bidirectional) alphanumeric messages. Short Messages are widely used
in GSM networks, but can be found in other networks as well.
Examples include NMT (Nordic Mobile Telephone) analogue network, TDMA
(IS-136) digital network, and others. A gateway, which provides the
means to convey internet originated e-mail messages to a particular
network using SMS, may need to know the type of the network and
possibly need to provide some additional parameters to facilitate the
delivery of a Short Message in the given network.
The type of network can be optionally expressed as a Service
Qualifier.
1.3 Convergence with the "gsm-sms" URL Scheme
[DRAFT-GSM-SMS-URL] was revised to converge with this specification.
1.4 The "VIA" Service Qualifier
Short Message services usually rely on a middleman to deliver the
messages, sometimes called a Short Message Service Centre. Sometimes
specifying the phone number of this middleman is required. For this
purpose, one can use the "VIA" Service Qualifier.
1.5 The "NET" Service Qualifier
The "NET" Service Qualifier describes the network type in which the
recipient is in. This is required because the gateway must know
whether it is able to relay the message or not, and which method of
delivery it has to use. In an environment where the gateway only
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Internet-Draft SMS Service Selector May 1999
supports one network type and does not guarantee delivery, this
Qualifier can be left out.
1.6 Requirements
Compliant software MUST follow this specification. Requirements are
indicated by capitalized words as specified in [RFC2119].
2. Definitions
2.1 Definition of the "SMS" Service Selector
The <service-selector> element in [DRAFT-FAX-FULLADDR] is "SMS".
This specifies a recipient of a Short Message in a mobile phone or
pager network. How the contents of the email are interpreted and
mapped to the Short Message are left as an implementation issue. If
the gateway cannot deliver the message, it SHOULD send an appropriate
negative acknowledgement to the sender.
An example:
SMS=+1-408-555-123456
2.2 Definition of the "VIA" Service Qualifier
See [DRAFT-IETF-FULLADDR] for the description of <qualif-type1> and
<global-phone>.
The "VIA" Qualifier is defined as follows:
qualif-type1 "keyword" name:
VIA
qualif-type1 "value" ABNF definition:
value = message-centre-id
message-centre-id = ["+"] phone-number
phone-number = 1*phonedigit
phonedigit = digit / "-" / "."
digit = "0" / "1" / "2" / "3" / "4" / "5" /
"6" / "7" / "8" / "9"
The <global-phone> element describes the GSTN number of a Short
Message Service Centre, which takes care of Short Message delivery to
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the recipient.
If the "VIA" Qualifier is present, the gateway MUST send the message
via this Short Message Service Centre or not send it at all.
An example:
SMS=+1-408-555-1234/VIA=+358-50-123-1234
2.3 Definition of the "NET" Service Qualifier
See [DRAFT-IETF-FULLADDR] for the description of <qualif-type1> and
<string>.
The "NET" Qualifier is defined as follows:
qualif-type1 "keyword" name:
NET
qualif-type1 "value" ABNF definition:
value = network-type
network-type = "GSM" / other-type
other-type = string
This Qualifier specifies the recipient's network type. "GSM" means
any GSM-based network (independent of the frequency band used). If
there is a requirement for other network types, the names for those
MUST be specified by another RFC and registered using another IANA
registration template. If the gateway is unable to deliver the
message, it SHOULD send an appropriate negative acknowledgement back
to the sender.
An example:
SMS=+1-408-555-1234/VIA=+358-50-123-1234/NET=GSM
3. References
NOTE. References to Internet-Drafts will be removed from the final
document which will be submitted to the RFC-Editor.
[RFC2303] Minimal PSTN Address Format in Internet Mail. March 1998.
C. Allocchio. RFC 2303. <URL:ftp://ftp.nordu.net/rfc/rfc2303.txt>
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Internet-Draft SMS Service Selector May 1999
[DRAFT-FAX-FULLADDR] GSTN address element extensions in e-mail
services. April 1999. C. Allocchio. An Internet-Draft. draft-ietf-
fax-fulladdr-06.txt
[DRAFT-GSM-SMS-URL] URLs for GSM Short Message Service. December
1998. A. Vaha-Sipila. An Internet-Draft. draft-antti-gsm-sms-url-
03.txt
4. Security Considerations
It should be noted that the user agent SHOULD NOT send out Short
Messages without the knowledge of the user because of associated
risks, which include sending masses of Short Messages to a subscriber
without her consent and the costs involved in sending a Short
Message.
The user agent SHOULD have some mechanism that the user can use to
filter out unwanted destinations for Short Messages. The user agent
SHOULD also have some means of restricting the number of Short
Messages sent.
5. Authors' Addresses
Contact person and version control responsibility for this
specification:
Nokia Mobile Phones
Antti Vaha-Sipila
P. O. Box 68
FIN-33721 Tampere
Finland
Electronic mail: antti.vaha-sipila@nmp.nokia.com
Please include your name and electronic mail address in all
communications. If you want to receive the newest version of this
specification electronically, send mail to the address above.
6. Full Copyright Statement
To be added to the final RFC.
Appendix A. IANA Registration Templates
A.1 "SMS" Service Selector
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Internet-Draft SMS Service Selector May 1999
To: IANA@isi.edu
Subject: Registration of new values for the GSTN address
service-selector specifier "SMS"
Service Selector Name:
SMS
Description of Use:
SMS - SMS, an acronym for Short Message Service, is a (possibly
bidirectional) alphanumeric paging message found in several
mobile phone systems. The recipient of the Short Message is
identified by a phone number. The Service Selector and its
Qualifiers are defined in [DRAFT-SMS-SERVICE].
Security Considerations:
It should be noted that the user agent SHOULD NOT send out
Short Messages without the knowledge of the user because of
associated risks, which include sending masses of Short
Messages to a subscriber without her consent and the costs
involved in sending a Short Message.
The user agent SHOULD have some mechanism that the user can use
to filter out unwanted destinations for Short Messages. The
user agent SHOULD also have some means of restricting the
number of Short Messages sent.
Person & Email Address to Contact for Further Information:
To be added to the final version.
A.2 "VIA" Qualifier
To: IANA@isi.edu
Subject: Registration of new values for the GSTN address
qualif-type1 element "VIA"
qualif-type1 "keyword" name:
VIA
qualif-type1 "value" ABNF definition:
value = message-centre-id
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message-centre-id = ["+"] phone-number
phone-number = 1*phonedigit
phonedigit = digit / "-" / "."
digit = "0" / "1" / "2" / "3" / "4" / "5" /
"6" / "7" / "8" / "9"
Description of Use:
This Qualifier specifies the phone number of the Short Message
Centre, which acts as an intermediary when delivering the Short
Message.
Use Restriction:
This Qualifier element is only meaningful for the "SMS" Service
Selector.
Security Considerations:
The security considerations are the same as for the "SMS"
Service Selector.
Person & email address to contact for further information:
A.3 "NET" Qualifier
To: IANA@isi.edu
Subject: Registration of new values for the GSTN address
qualif-type1 element "NET"
qualif-type1 "keyword" name:
NET
qualif-type1 "value" ABNF definition:
value = network-type
network-type = "GSM" / other-type
other-type = string
Description of Use:
This Qualifier specifies the recipient's network type. "GSM"
means any GSM-based network (independent of the frequency band
used). If there is a requirement for other network types, the
names for those MUST be specified by another RFC and registered
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using another IANA registration template.
Use Restriction:
This Qualifier element is only meaningful for the "SMS" Service
Selector.
Security Considerations:
The securiry considerations are the same as for the "SMS"
Service Selector.
Person & email address to contact for further information:
To be added in the final version.
A. Vaha-Sipila, J. Alvinen Exp. Nov 1999 [Page 9]
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