Specifications

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Chapter 13: Topology – Network Services
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Alcatel-Lucent Enterprise Communication Solutions
April 2014 Offer
ISVPN is also supported on the Alcatel-Lucent OmniPCX Office, which is used to build small, simple
enterprise/office networks over ISDN.
3.3.2 DPNSS networking
The Alcatel-Lucent OmniPCX Enterprise Communication Server offers a compliant legacy Digital
Private Network Signaling System (DPNSS) interface and protocol, mainly used to connect the voice
system to:
– DPNSS installed base not compatible with QSIG
– VPN offer of BT (FEATURENET) and Cable & Wireless in UK
– Alternative carriers (e.g., GSM operators in Germany and Sweden)
– Legacy applications
The DPNSS services supported are:
– Voice call (six and seven)
– Callback when free (call completion on busy phone) (nine)
– Intrusion/Barge-in (ten)
– Call forwarding (11)
– Hold (12)
– Inquiry/consultation call (13)
– Transfer (13)
– Conference (13)
– Call offer (14)
– Service independent string (16) name
– Call waiting (17)
– Route optimization (19)
– Centralized night service (25)
– Do not disturb (32)
3.3.3 QSIG
The QSIG protocol provides a very good method for connecting PBXs from multiple vendors. QSIG is
an open, international standard supported by the world's leading PBX suppliers. The QSIG protocol is
based on ISDN and ensures service compatibility between public and private ISDN networks. QSIG
can work in all kinds of topologies, with no limitation on the number of nodes supported and no
restrictions on the numbering (dialing) plan.
The Alcatel-Lucent OmniPCX Enterprise Communication Server offers a network interface
implementing QSIG-BC (QSIG basic call). QSIG BC (ETS 300 172) is the part of the protocol that
describes the basic call and extends the public ISDN access protocol for use in private basic rate
access and primary rate access services. As one of the QSIG Forum founders, Alcatel-Lucent supports
this standard and is committed to implementing enhancements as the OSI committee makes them
standards.
QSIG numbering (dialing) plan
The following numbering plans are supported:
– Heterogeneous numbering plan
– Closed numbering plan
– Open numbering plan (up to 20 digits)