Mitel Aastra 470, System Manual

Page: 57 / 284

Expansion Stages and System Capacity
57
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014
3. 3. 2. 1 Trunk cards
The trunk cards contain interfaces for connection to the analogue public network
(PSTN), the digital public network (ISDN) or for networking systems to create a pri-
vate telephony network (PISN). The trunk cards can be used and operated on any
slots for interface cards.
The trunk cards contain either FXO interfaces (FXO: Foreign Exchange Office), PRI
interfaces (PRI: Primary Rate Interface) or BRI interfaces (BRI: Basic Rate Interface).
BRI cards contain both network interfaces (BRI-T) and terminal interfaces (BRI-S).
On the BRI cards 4 interfaces can be individually configured to BRI-S or BRI-T.
Tab. 26 Trunk cards
Type
Network inter-
faces per card Max. number of
cards per system
Remarks
1PRI 1

PRI 7
1)
1)
1 fewer card if CPU2 application card is fitted
• Can be fitted with 1 IP media module
• Contains 30 B channels
• 10 B channels can be used licence-free
2PRI 2

PRI 7
1)
• Can be fitted with 2 IP media modules
• Contains 2

30 B channels
• 2

10 B channels can be used licence-free
4BRI 4

BRI-T 7
1)
• All interfaces configurable to BRI-S
8BRI 8

BRI-T 7
1)
• Four fixed BRI-T interfaces
• 4 BRI-T interfaces configurable to BRI-S
4FXO
2)
2)
The availability of the FXO trunk cards depends on the sales channel.
4

FXO 7
1)
• 1 call charge module can be fitted for 4 ports
8FXO
2)
8

FXO 7
1)
• 1 call charge module can be fitted for 8 ports
16FXO
2)
16

FXO 4 • 1 call charge module can be fitted for 16 ports