3com MSR 20 User Manual
240
C
HAPTER
A: I
NTERFACE
C
ARD
AND
I
NTERFACE
M
ODULE
P
URCHASE
G
UIDE
VPM32
×
√
×
√
√
√
√
VPM24
×
√
×
√
√
√
√
VPM16
×
√
×
√
√
√
√
VPM8
×
√
×
√
√
√
√
Table 180 ESM/VPM/VCPM options
Interface card
type
type
20-20/
20-21 20-40 30-11 30-16 30-20
20-21 20-40 30-11 30-16 30-20
20-40/
30-60
30-60
50-40/
50-60
50-60