Memotec CX900e, Hardware Reference Manual, Page: 32 / 200

1.3 Recommended Configurations
The motherboard accommodates up to six I/O cards. Most I/O cards supply one
port with the exception of the Multi-I/O card, and the Universal I/O card, which
supply five ports each, and the DAV I/O card which supports two ports. An
additional V.24 port is available with the Data Expansion Module (DEM) option.
Table 1-1 shows the recommended CX900e configurations along with their
capabilities and limitations.
* must be used in conjunction with ISDN BRI-S/T
Legend for Table 2-1:
OK The I/O in this slot can be used without special requirements.
BEST Use these slots first for the I/O card specified. Filling these slots with the speci-
fied I/O cards means that a Data Expansion Module (DEM) is not required.
OK with DEM DEM is required when filling the slot with the specified I/O card. The DEM sup-
plies the SCC’s for serial I/O cards in slots 5 and 6, and an additional V.24 port.
NO The specified I/O card cannot be used in these slots.
† The +1 indicates an extra port from the DEM card.
Table 1-1 Recommended Configurations
I/O Card
Maximum
Speed
Max.
cards of
this type
Slot 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6
Multi EIA-232/V.24 128 Kbps 5 OK OK with DEM
EIA-232/V.24 128 Kbps 6+1 † OK OK with DEM
V.35H or
V.35EU
2.048 Mbps 6 OK OK with DEM
X.21 2.048 Mbps 6 OK OK with DEM
Universal I/O 2.048 Mbps OK OK with DEM
56K/64K DSU/CSU 56K/64K bps 5 OK OK with DEM
V.34 Modem 28.8 Kbps 5 OK OK with DEM
Analog Voice I/O
(with Ring Generator)
n/a 4 OK BEST
Dual Analog Voice I/O(DAV I/O)
(with Ring Generator)
n/a 3 OK BEST
10BaseT
Ethernet
10 Mbps 1 OK NO
Fast Ethernet
autosense
10 or
100 Mbps
1 OK
Token Ring
4 or
16 Mbps
1 OK
ISDN BRI-U
ISDN BRI-S/T
128 Kbps 5 OK
DDVC* n/a 2* OK
ISDN BRI-S/T Digital Voice 128Kbps 3 OK
T1/E1 CSU/DSU
1.544 Mbps
or
2.048 Mbps
1 OK NO