Installation manual

OfficeServ 7400 System Description

2.3.5.2 OAS (OfficeServ Application Server)

The OAS converts the voice into data and transmits the data through the data network.

It supports a maximum of 32 channels and provides the G.729, G.723, G.711 voice

compression/decompression function. It also provides a T.38 specification compliant Fax

function. OAS can be mounted on slots 1, 2, 3, 4, and 5 of the basic and expansion cabinet.

If the OAS board is mounted on one of the slot 1 and 2, no board can be mounted on the

other slot. If any board is mounted on the other slot, the board will not work.

Major Functions

The major functions of the OAS are as follows:

y Voice decompression (Codec): G.729, G.723, and G.711

y Fax Relay Function: Providing 1 FAX channel according to Voice 1 channel

y Echo cancellation: Dual Filter EC (Enhanced EC)

y Volume adjustment (-14~+6 dBm)

y Silence suppression

y DTMF receiver functions with channel numbers such as 32, 28, 24 or 16 for MOBEX

Executive user.

y MPS (Media Proxy Service) redirects the RTP data for the call between IP Phone of

Private IP Network and that of Public IP Network.

Front View of OAS

The front view of the OAS is shown in the figure below:

Figure 2.32 Front View of the OAS

The components on the front panel of the OAS have the functions below:

RST

OAS

LAN

SIO

PWR RUN

LAN

SVC1

LAN

SVC2 SVC3 SVC4