Features and Specifications Manual V - 9
Voice Over Internet
Protocol (VoIP)
V-3
FEATURE
DESCRIPTION
Voice over IP sends the real time voice/fax over the corporate LAN or WAN.
The voice from the telephone is digitized and then put into packets to be sent
over a network using Internet protocol.
Savings in the telephony charges for calls between two KTSs and using the
LAN/WAN infrastructure to its full capacity are advantages in having VoIP for
the Electra Elite system.
The IPT(4)/(8)-U10 ETU is an optional interface that can combine trunk and
Tie line calls into Gateway trunks that can operate in the following operating
modes:
•COI
•COID
•DID
•TLI
Depending on the requirements and resource allocation in the LAN/WAN/
Internet, the IPT(4)/(8)-U10 ETU can be configured to use any of the following
voice compressions:
• G.711 Mu Law — Highest Bandwidth
• G.723 — Most often used
• G.729(a) — Lowest Bandwidth
The IPT(4)/(8)-U10 ETU is assigned as a two-port TLI(2)-U10 ETU, four-port
DID(4)/COI(4)/COIB(4)/COID(4)-U10 ETU, or an eight-port COI(8)/COID(8)-
U10 ETU and can be installed in interface slots supporting these ETUs. The
LAN/WAN or internet connection is provided by a 10/100 Base T Ethernet.
The ETU operating mode can be configured per ETU, but not per port.
Possible Slot locations include the following:
COI/DID/TLI Mode Slot S1~S8 in 192 KSU
Slot S2~S7 in 48 KSU
COID Mode Slot S1~S4 in basic or first Expansion 192 KSU
Slot S3 or S4 in 48 KSU
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