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Chapter 6 <br />

another Alcatel-Lucent OmniPCX Office Communication Server system and which therefore<br />

has its own gateway. This configuration is suitable for small installations (less than 10<br />

gateways and 50 PC/H.323 terminals).<br />

This requires configuration of numbering plans in full for all systems. All the H.323 items<br />

(remote system, PC, H.323 terminals) should be defined in the ARS tables of all systems. The<br />

Gatekeepers integrated into other Alcatel-Lucent OmniPCX Office Communication Server<br />

systems should be inhibited and the IP address of these systems' external Gatekeeper should<br />

be the same as the master system's.<br />

6.3.1.1.4 Fax over IP (FoIP)<br />

The Fax over IP services are available when a Fax is detected in an H.323 call. When this<br />

happens, the Audio channels are closed and T38 sessions are initialized to transmit or receive<br />

Fax packets (IFP - Internet Fax Packet).<br />

Alcatel-Lucent OmniPCX Office Communication Server only allows T38 sessions over UDP. In<br />

order to ensure the reliability of the UDP transmission, the packets are sent several times to<br />

ensure that the information reaches its destination; this operation is called "UDP Redundancy".<br />

In order to reduce bandwidth use, an operation (framing) allows the concatenation of packets<br />

of the same type.<br />

The Fax over IP (FoIP) service does not require any particular configuration of the ARS table.<br />

A Fax call is considered as a transparent H.323 call to the ARS operations.<br />

Note:<br />

Fax over G711, an extended procedure of Fax over IP using the SIP protocol, is not supported in the<br />

context of H.323 calls.<br />

6.3.2 Service H.450<br />

6.3.2.1 Detailed description<br />

The following services are supported:<br />

H.450 Service Supported level<br />

H.450.1: Generic functional protocol for additional<br />

H.323 services<br />

H.450.2: Call transfer<br />

H.450.3: Call forwarding<br />

H.450.4: Warning<br />

H.450.5: Call parking/pick-up<br />

H.450.6: Call signaling on the called station<br />

Supported<br />

Supervised transfer: supported<br />

Unsupervised transfer:<br />

- if the destination is an Alcatel-Lucent OmniPCX<br />

Office Communication Server: supported<br />

- if the destination does not support this feature, a<br />

transfer by joining is made by forwarding Alcatel-Lucent<br />

OmniPCX Office Communication<br />

Server<br />

Immediate diversion: supported (including PO forwarding)<br />

Other forwarding: not supported<br />

Not supported<br />

Not supported<br />

Not supported<br />

6-10

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