00637nam a2200229Ia 450000500170000000800460001703700100006304000080007304000080008104000080008904100080009704100080010508400080011310000130012124500710013426000090020526000090021485600620022394200100028599900210029595200910031620260320200941.0008  262003s9999    xx            000 0 eng d  aEBOOK  aCRL  beng  cCRL  2eng  aeng  qCRL  aJohnston 0aSIP: Understanding the Session Initiation Protocol, Second Edition  bIEEE  c2003  uhttps://ieeexplore.ieee.org/servlet/opac?bknumber=9106089  cEBOOK  c1717869d1717869  00104070aCRLbCRLd2026-03-20l0pCL2121963r2026-03-20 20:09:41w2026-03-20yEBOOK