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SIP Telephony Device Requirements draft-sinnreich-sipping-device-requirements-00.txt

This informational document outlines requirements for configuring SIP phones over networks, focusing on protocols, consistent operation, media and codecs, and user interfaces. It covers LANs, power usage, and mechanical/acoustic standards such as ANSI/EIA/TIA-810-A-2000 and TIA/EIA-579-A. The scope excludes mobile devices but includes LAN-based devices. The document addresses translating local emergency numbers to SOS URLs and the ability to disallow REFER requests. Comments from various experts suggest specific codec support, DHCP requirements, and security considerations for SIP devices.

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SIP Telephony Device Requirements draft-sinnreich-sipping-device-requirements-00.txt

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  1. SIP Telephony Device Requirementsdraft-sinnreich-sipping-device-requirements-00.txt Daniel Petrie dpetrie@pingtel.com SIPPING WG 18 Mar 2002 SIP Device Requirements

  2. SIP Telephony Device Requirements <draft-sinnreich-sipping-device-requirements-00.txt>, informational • With companion drafts: • "A Framework for SIP User Agent Configuration" • <draft-petrie-sip-config-framework-01.txt> • "SIP End Point Configuration Data Format Requirements" • <draft-stredicke-sipping-ep-config-00.txt> Buy SIP phones and configure over the network Consistent operation by ISPs and/or Enterprises • Protocols • Configuration processes • Media and codecs • Echo control • Services supported by SIP telephony devices • User interface • LANs and power SIP Device Requirements

  3. Scope Issues • Line Echo Cancellation – Not applicableRemoveITU-T G.168, not G.165 • Acoustic Echo Cancellation • Hands free/Speeker phone – Not in scopePrice point/vendor decision • Handset – In scope (the thing you hold not the whole device)Mechanical & Accoustic coupling: • ANSI/EIA/TIA-810-A-2000 • TIA/EIA-579-A • LAN Based devices – In scope(e.g. Fixed and wireless) • Mobile Devices – Not in scope(e.g. 3G) SIP Device Requirements

  4. Misc. Issues • SHOULD/MUST provide translation from local emergency number to sos URL • SHOULD provide ability to disallow REFERLarger scope than REFERAddress this in: draft-ietf-sipping-cc-framework-00.txt • Make this a SIPPING WG Item SIP Device Requirements

  5. Comments received on the Requirements I-D Count: 1 for wireline phones, 1 generic SIP, 2 for wireless devices Robert Born: • Acoustic properties: Specify ITU-T G.168, not G.165 • Acoustic-electrical for IP/packet: ANSI/EIA/TIA-810-A-2000 • Stability and minimum loss: TIA/EIA-810-A and TIA/EIA-579-A Yaron Sheffer: • DHCP is a MUST • HTTP and DNS in client, server or both • Emergency URL – write just “sos” for non-technical people • ILBR codec: Need reference draft • Supported services: In server or phone? • Disabling SIP REFER – “SHOULD” for security reasons Karl Pospisek: • GSM-EFR codec MUST be supported, though GSM-AMR is the 3G choice Ashutosh Dutta: • Used Columbia SIPC (also in Linux) IPAQs/802.11b, CDPD, CDMA1XRTT SIP Device Requirements

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