Voice Ports
Enterprise networks generally use agenda circuits, in adverse to analog circuits, back interconnecting
their Articulation over IP (VoIP) arrangement to acceptable telephony environments,
such as the accessible switched blast arrangement (PSTN) or a clandestine annex exchange
(PBX). One above advantage of application agenda circuits is the economies of calibration fabricated possible
by alteration assorted conversations over a distinct circuit. For example, a digital
T1 ambit application Channel Associated Signaling (CAS) (which is declared in this chapter)
can backpack 24 accompanying articulation conversations on a distinct circuit.
Many enterprises additionally accept the charge to interconnect PBX systems, and these PBXs might
be from altered manufacturers. In abounding cases, two PBXs from altered manufacturers
can be commutual via a agenda circuit. However, a accepted signaling accent needs
to be announced amid the PBXs to acquaint assorted alarm accompaniment information.
Fortunately, if both PBXs abutment the Q Signaling (QSIG) protocol, they can use QSIG as
their accepted signaling protocol. This affiliate explores QSIG approach and configuration.