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1-12 About the Vanguard 6435/6455
PRI Supplementary Service
PRI Supplementary Service
Introduction The PRI Supplementary Services provide transparent support for supplementary
PBX services, so that proprietary PBX features are not lost when connecting PBX’s
through the Vanguard Managed Solutions Vanguard gateway networks. Examples of
these features are:
• Calling Line Identification Presentation (CLIP)
• Calling Line Identification Restriction (CLIR) in temporary mode
• Call Holding
• Call Transfer
• Call Forwarding
• Call Waiting
Note
Release 6.0 and greater includes end-to-end support for Q.Sig supplementary
services for the 6455 and 7300 Series platforms. This capability is consistent
with the services now available for BRI on these same platforms.
Messaging Figure 1-7 through Figure 1-10 represent the four types of messaging supported:
• Basic Q.SIG Application
• Facilities Messages
• Connectionless Messages
• D-Channel Only Messages
Figure 1-7. Basic Q.SIG Application
Frame Relay
QSIG
QSIG
QSIG to QSIG
Internetw
orking
S0
E&M
FXS
E1/PRI
PBX
PBX
PBX