Samsung iDCS Release 2/OfficeServ Specifications download pdf (Page 56)

use when preparing voice compression for IP transport. Compression is used to reduce the digitized voice

into a smaller bandwidth that can be carried in smaller packets.The VoIP gateway determines the compres-

sion method for each call setup.There is also a certain amount of frame/packet overhead in each compres-

sion channel. 64K of bandwidth can support 6~7 calls simultaneously.This can vary depending on efficiency

features like Silence Suppression and multiframe counts.Unlike switched networks,VoIP connections consist

of a sequence of numbered data packets. Since voice conversation is usually considered “real time” these

packets need to be delivered in a consistent manner with minimal delay. This can be controlled via a

Gatekeeper which tracks and monitors voice packets.Gatekeepers are part of the H.323 standard but are not

required.The iDCS 100 Release 2 MGI cards are Gatekeeper compliant.

In any Ethernet environment, packet transfers are subject to delays and/or loss. If these delays are greater

than 200ms the voice quality will deteriorate. The Ethernet data traffic and network topology should be a

consideration when using VoIP. Network congestion will affect call quality in any VoIP application.

WALKING CLASS OF SERVICE

This feature allows users to make calls or use features from a station that is restricted. The users may either

use the WCOS feature code or the authorization code feature. Both methods change the class of service to

correspond with the station passcode or authorization code that is dialed.After the call is completed,the sta-

tion returns to its programmed class of service.

WIRELESS HANDSET—See Mobility Solution

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Samsung iDCS Release 2/OfficeServ Specifications Page 56