Specifications

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Chapter 13: Topology – Network Services
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connected to another Communication Server, through ABC/IP Trunk Group or ABC TDM Links)
belonging to different Communication Servers.
– Peer-to-peer communications in conversation state are maintained
– In set-up phase, communications are released except for incoming external communications,
which are routed to the relevant entity (e.g. an attendant)
– Conferences are not maintained and communication on hold will be either distributed in
function of entity (for external communication) or released
– Communications involving attendant, automated attendant, IVR, voice mail, nomadic are
released
The evolution of the communication (from calling party or called party) is not handled during the
switch-over (except for hanging up, press the release key, hands-free/ handset switch-over, mute
activation/deactivation, level of loudspeaker management). However, at the end of switch-over (new
established link between the two Communication Servers), the communication can evolve as before.
For IP and hybrid links, the network communication cannot evolve during the switch-over (40-60
seconds.). Nevertheless, users can:
– Alternate between hands-free / handset
– Mute/ un-mute
– Modify the loudspeaker level
– Release the call (hang-up, press the release key)
The devices are not reachable and are seen out of service during switch-over.
This feature does not require additional new fees and it is compatible with:
– IP Touch Security deployment
– Communication Server spatial redundancy
3.3 Heterogeneous networking
3.3.1 ISVPN (country dependent)
ISDN based VPN (ISVPN) provides an entry level networking solution based on a subset of the ABC
private network protocol using only the ISDN network.
No leased line is required for voice or telephone signaling. Voice is transported over the standard
public ISDN network, and the signaling transport is based on the USS1 service provided by the ISDN
network. The features provided by this service are:
– Distribution of incoming public calls based on virtual DID
– Homogeneous private numbering (dialing) plan
– An ISVPN call is seen as an internal call, not a public call
– Name identification (with transport of number)
– Optimized transfer (loop avoidance and optimized call forwarding)
– Callback request (on Alcatel-Lucent 8/9 series)
– Intrusion/Barge-in
– Other Alcatel-Lucent OmniPCX Enterprise Communication Server features over ISDN
without the added value of ISVPN
– Call distribution in network: centralized attendants
– Inter-working with ABC networks
– Centralized management