iPECS SBG-1000 User Manual (IP-PBX Features)
2-89
2.44 CO
L
INE
R
ELEASE
G
UARD
T
IME
Description
To assure that the PSTN switching equipment has sufficient time to restore the idle status, the
system will hold CO lines in a busy state to users after release of a CO line by a station. The time
between station disconnect and when the system changes the CO line status from busy to idle is
the CO Line Release Guard time.
Operation
System
Operation of this feature is automatic.
Conditions
Programming
V
OICE
C
ONFIG
System Data
– Call Feature Timer – CO Release Guard Timer
Related Features
Hardware
2.45 IP
T
RUNKING
2.45.1 SIP Service
Description
When assigned to support Session Initiation Protocol (SIP), VoIP channels provide protocol
conversion between SIP and the iPECS protocol. This permits the VoIP channel to connect to
external SIP networks for call services. In addition, to the IETF RFC-3261 SIP draft standard,
iPECS SBG-1000 VoIP channels support other SIP-related RFCs including:
RFC-2617
HTTP Authentication, Basic & Digest
RFC-3515
Refer Method
RFC-3264
Offer/Answer Model
RFC-3265
SIP Basic Call Flow Examples
RFC-3891
SIP “Replaces” Header
Using the SIP database assignments, the system will register and authenticate with the SIP proxy
server permitting the system to interoperate employing SIP to establish, manage and terminate
real-time voice sessions with external parties.