Aastra SIP-DECT (Release 1.8)-Installation- and Administr Manual de usuario descargar pdf (Pagina 12)

Installation, Administration and Maintenance

Aastra depl-0900/0.4 Page: 12 (104)

2.3 OpenMobility Manager

The OpenMobility Manager (OMM) performs the following tasks:

• Signalling gateway (SIP <-> DECT).

• Media stream management.

• Managing sync-over-air functions between RFPs’.

• Facilitating system configuration modifications.

• Provides additional services e.g.

- Corporate directory (LDAP based)

The OpenMobility Manager (OMM) runs on one of the RFPs’.

2.4 IP signalling and media stream

To establish a call between an IP Phone and a PP (Aastra DECT 142

Handset / Aastra 142d), the following IP streams must be established:

• A signalling channel to and from the SIP phone.

• A signalling channel to and from the OMM.

• A control interface between the OMM and the RFP that has a connection

to the PP (known as the primary RFP).

• A Real Time Protocol (RTP) / Real Time Control Protocol (RTCP)

connection between the SIP phone and the primary RFP.

The following figure illustrates this scenario.

To establish a call between two PPs’ the same IP streams must be

established like in the scenario before, except the IP phone is not involved.

The following figure illustrates this scenario.

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Aastra SIP-DECT (Release 1.8)-Installation- and Administr Manual de usuario Pagina 12