ShoreTel IP100 Spezifikationen Seite 20

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ShoreTel System Communications Chapter 2: ShoreTel Architecture
12
DTAS makes the distributed TMS architecture transparent to applications and reduces the
number of network connections that would be needed if every application had to connect
to every TMS instance.
Switches are assigned to specific TMS servers through ShoreWare Director. Assignment of a
switch to a TMS server is restricted to TMS servers at its own site, or if there is no TMS
server at that site, to the nearest TMS servers in the site hierarchy above.
TAPI requests invoke ShoreTel's Remote TAPI Service Provider, which uses Remote
Procedure Calls (RPC) to communicate with TMS. TMS uses Network Call Control to
exchange commands and events with ShoreGear voice switches so that TMS can present
extensions and trunks as TAPI lines to the applications.
2.3.4 Media
Media travels through the ShoreTel system using Real-Time Protocol (RTP). After call
setup, media flows directly between IP phones via RTP. The ShoreGear switch is involved
only when setting up or tearing down a call.
Figure 2-6 Media Traffic in a ShoreTel System
= SMTP
(Voice Messages Sent as Email Attachments)
= Remote IP Phone to Voice Mail
= IP Phone to Voice Mail
= IP Phone to Analog Phone
= IP Phone to IP Phone
Legend
Headquarters Site
Regional Site
Small Office / Home office
Teleworkers
ShoreTe l
Conference Bridge
ShoreGear 120/24 Switch
ShoreGearT1 Switch
ShoreGear 120/24 Switch
ShoreGear 120/24 Switch
ShoreGear 40/8 Switch
ShoreGear 120/24 Switch
ShoreGearT1 Switch
Soft
Phone
Desktop
Clients
OR
IP Phone
Desktop
Clients
Desktop
Clients
IP Phone
IP Phone
Desktop
Clients
Analog PhoneIP Phone
Soft
Phone
Desktop
Clients
IP Phone
IP Phone
Analog PhoneAnalog Phone
ShoreWa re
Director
DRS
IPDS
CSIS
Voice Mail
Media Driver Sys
SoftSwitch
DTAS
TMS
Remote Server
DRS
IPDS
CSIS
Voice Mail
Media Driver Sys
SoftSwitch
DTAS
TMS
Remote Server
Media Driver Sys
Voi ce M a il
Distributed Routing
Service (DRS)
IP Phone Display
Service (IPDS)
Client Server Internet
Services (CSIS)
Internet Information Server
(IIS)
Softswitch
CDR
Database
Configuration
Database
Data Services
Distributed Telephony
Application Service (DTAS)
Telephony Management
Service (TMS)
HQ Server
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