What is SIP?

SIP Trunks – Demystified

Standards: something considered by an authority or by general consent as a basis of comparison; an approved model.

Standards are required to communicate.  Whether those standards are sounds such as language, units of weights and measurements – English or Metric, or in the modern world methods to connect various digital equipment – Internet Protocol, T1, ISDN PRI or POTS (Plain old Telephone).  All require standards that need to be adhered to in order to work effectively.

SIP (Session Initiation Protocol) is the new standard that is being used to communicate in the Telephony industry.  SIP runs within the Internet Protocol and is used primarily to move Voice Traffic across a Internet Protocol Network.  Most often they are provided as part of your internet service provided by your Internet Service Provider (ISP).   SIP Trunks are used exclusively over circuits that transmit Internet Protocol.

Smaller business customers primarily realize the benefits of SIP.  Features like Caller ID, Direct Inward Dialing (DID) and outbound manipulation of displayed number in the caller ID field are purchasable in single channel increments.  In the past these features were only available to big corporations.  Similar technology is sold in 23 channel increments making it too expensive for many companies.  SIP technology makes such features affordable for any size organization.

Craig Hodges




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