NEC ElectraElite IPK, Общее описание устройства

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Electra Elite IPK Document Revision 4
General Description Manual 5 - 15
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S
ECTION
7 O
UTSIDE
L
INE
T
YPES
The following outside lines can be used with the Electra Elite IPK system.
H
2-wire, Loop Start or Ground Start Trunks
H
2-wire, 2-way DID Lines (Dial Pulse or DTMF)
H
4-wire, E&M Tie Lines (Type I or V, Dial Pulse, or DTMF)
H
Digital Trunk T1/FT1 (Loop Start, Ground Start, Tie Line (E&M), or DID
Signaling)
H
ISDN-BRI Trunks
H
ISDN-PRI Trunks
H
VoIP Trunks (Internet Protocols)
S
ECTION
8 N
ETWORK AND
C
ONTROL
8.1 Transmission, Network, and Control Specifications
8.1.1 Transmission
H
Data Length:
From Multiline Terminal to ESI(8)-U( ) ETU: 23 bits
From ESI(8)-U( ) ETU to Multiline Terminal: 23 bits
H
Data Transmission Rates:
Between ESI(8)-U( ) ETU and Multiline Terminal: 184K bps
(voice and signaling)
H
Scanning Time for each Multiline Terminal: 32 ms.
8.1.2 Network
Time Division Multiplexing (TDM) allows transmission of a number of
separate data and voice simultaneously over one communications
medium. The information below indicates the specifications the
Electra Elite IPK system uses for switching, clock, data bus,
timeframe.
H
TDM Switching: PCM (µ Law)
H
TDM Clock: 2.048 MHz
H
TDM Data Bus: 8 bit
H
TDM Timeframe: 125 µs.