Mitel Aastra 470, Системное руководство, Страница: 58 / 284

Expansion Stages and System Capacity
58
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014
3. 3. 2. 2 Terminal cards
Terminal cards are used for connecting digital and analogue voice and data termi-
nals such as:
FXS cards are an exception. Their analogue interfaces are multifunctional. In addi-
tion they provide interfaces for controlling external devices and switching over in-
ternal switch groups. Depending on the terminal or function, the interfaces are
configured individually and switched over internally accordingly (see
"Multifunc-
tional FXS interfaces", page 145 ).
DSI cards are used for connecting digital system terminals such as phones. 2 termi-
nals can be connected to each DSI interface.
Terminals to ETSI standard are connected via BRI cards. The cards contain both ter-
minal interfaces (BRI-S) and network interfaces (BRI-T). On the BRI cards 4 interfaces
can be individually configured to BRI-S or BRI-T.
Tab. 27 Terminal cards
Type
Terminal interfaces
per card Max. number of
cards per system
Remarks
4FXS 4

FXS 7
1)
1)
1 fewer card if CPU2 application card is fitted
• Interfaces individually configurable
• 2 interfaces on each card (X.1 and X.2) are
designed for long lines.
8FXS 8

FXS 7
1)
• Interfaces individually configurable
• 2 interfaces on each card (X.1 and X.2) are
designed for long lines.
16FXS 16

FXS 7
1)
• Interfaces individually configurable
• 2 interfaces on each card (X.1 and X.2) are
designed for long lines.
Note:
To prevent the system from overheating, no
more than 50 FXS ports should be active simulta-
neously on each system.
32FXS 32

FXS 7
1)
• Interfaces individually configurable
• 2 interfaces on each card (X.1 and X.2) are
designed for long lines.
Note:
To prevent the system from overheating, no
more than 30% of the FXS ports should be active
simultaneously per 32FXS card and no more than
50 FXS ports per system.
8DSI 8

DSI 7
1)
16DSI 16

DSI 7
1)
32DSI 32

DSI 7
1)
4BRI 4

BRI-S 7
1)
• All interfaces configurable to BRI-T
8BRI 4

BRI-S 7
1)
• Four fixed BRI-T interfaces
• 4 BRI-S interfaces configurable to BRI-T