Alcatel Voice over WLAN (R1.1.1) Specifications download pdf (Page 65)

The PCS can rescue SIP phones and SIP trunk groups (SIP trunking), provided the SIP devices

(external gateways/SIP proxies, SIP phones) can handle primary and secondary DNS server

addresses (to access the main and backup Com Servers), and a proxy server address (to access the

PCS). The Domain Name (DN) resolution is performed with DNS A (DNS SRV is not supported).

SIP registrations on the main Com Server are not duplicated on the PCS. When the PCS becomes

active (Com Servers are down), the SIP sets must register on the PCS to be in service.

The Alcatel-Lucent OmniTouch 8450 Fax Software solution does not support backup SIP proxy.

In normal conditions:

The Communication servers control the calls within the network

The IP Phones and/or Media Gateways within a region are defined for the PCS

Automatic or manual synchronization of the region is carried out on a general or individual

PCS basis

If Communication Server loss occurs:

The telephony services are restarted locally

Centralized services such as voice mail are no longer available

All standalone features defined inside active call processing are maintained by the PCS

including OmniTouch Contact Centers.

CDRs (Call Detail Record) are recorded in the PCS

When the IP link to the OmniPCX Enterprise is back IN SERVICE, the PCS switches to standby mode

either after a timer or at a configured time (typically the PCS is configured to switch at night to

avoid telephone disruption).

When the PCS switches to standby mode:

IP phones and media gateway reboot and are under the OmniPCX Enterprise control

Accounting tickets (CDRs) are transmitted to the OmniVista 8770

The PCS is defined with the same provisioning level as the Communication Server. It can be hosted

on a Common Hardware CPU, Appliance Server, or Blade Server.

Note: Because of the differences in the Database structures, IP Crystal Servers cannot be used in a PCS

configuration. A PCS cannot be duplicated.

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Alcatel Voice over WLAN (R1.1.1) Specifications Page 65