SIP method options

Business SIP Provider
Provider Plan Details Monthly Rate *
Nextiva SIP Trunking PBX SIP Trunking
  • Compatible with nearly all PBX systems
  • US-based support
  • No contracts at all
$14.95
 Details

143 Reviews
Vocalocity Unlimited Extension
  • Unlimited calling and long distance
  • Company Call Record, Voicemail to email transcription
  • No contracts, not setup or installation fees
$24.99
 Details

33 Reviews
RingCentral SIP RingCentral Office
  • Unlimited calling and faxing
  • No Commitment, No Setup Fees, No Installation
$19.99
 Details

54 Reviews
Jive Communications Smart PBX
  • Unlimited Use of All Features
  • Free Long-Distance
  • No Contracts or Hidden Fees
$21.95
 Details

135 Reviews
8x8 8x8 IP Trunking
  • No contract required.
  • Unlimited Calls (9 free countries)
  • Save 50% or more
$29.99
 Details

84 Reviews
Improcom VoIP Unlimited Business SIP Solution
  • Best overall quality & service
  • Unlimited calling in/out
  • Month to month agreement
$24.95
 Details

14 Reviews
*Taxes and other fees may apply.
From the SIP RFC:



The SIP method OPTIONS allows a UA to query another UA or a proxy server as to its capabilities. This allows a client to discover information about the supported methods, content types, extensions, codecs, etc. without "ringing" the other party.

For example, before a client inserts a Require header field into an INVITE listing an option that it is not certain the destination UAS supports, the client can query the destination UAS with an OPTIONS to see if this option is returned in a Supported header field.

All UAs MUST support the OPTIONS method.



Back to SIP

Created by: oej, Last modification: Wed 08 of Jun, 2011 (05:21 UTC) by spamblock


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