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13 Cards in this Set
- Front
- Back
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key fundamental sip messages exchanded during a sip call |
invite trying ringing ack or prack ok |
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invite |
sip request called method, used to establish medial sessions between user agents, could contain session information, does not contain media information |
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sip methods |
invite, register, bye, ack, cancel, options |
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headers |
used to identify caller, hold key parameters in the sip invite, |
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supported video media types |
h261, h263,h264 |
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PSTN |
public switched telephone network |
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PRI |
standard for providing telecommunicaiton services to offices, based on T1 carrrier - 24 channels |
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mpls |
scalable, protocol independent transport, data packets are assigned labels, packet forwarding decisions are determined based on the label without out the need to examine the packet |
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SDP |
session description protocol, describe the kinds of media that it has to offer or that it wishes to accept |
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types of user agents |
UAC and UAS |
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what do UAC clients do |
clients that initiate requests |
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what do UAS clients do |
clients that respond to requests |
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sip |
session initiation protocol |
