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2811 Chassis
Network Module
Slots
2821 Chassis
Network Module
Slots
2851 Chassis
Network Module
Slots
3825 Chassis
Network Module
Slots
3845 Chassis
Network Module
Slots
Maximum Number of T1
or E1 Voice Ports and
Voice Channels
Supported
Two T1 or Two E1
(48 voice
channels—T1)
(60 voice
channels—E1)
Two T1 or Two E1
(48 voice
channels—T1)
(60 voice
channels—E1)
Two T1 or Two E1
(48 voice
channels—T1)
(60 voice
channels—E1)
Four T1 or Four E1
(96 voice
channels—T1)
(120 voice
channels—E1)
Eight T1 or Eight E1
(192 voice
channels—T1)
(240 voice
channels—E1)
CISCO IOS SOFTWARE AND MEMORY SUPPORT
Table 6. Digital T1/E1 Packet Voice Trunk Network Module IOS Software and Memory Support
Product Number Platform IOS SW Version IOS Feature Sets Minimum DRAM
Memory for
12.2(x)T release
Minimum FLASH
Memory for
12.2(x)T release
All Digital E1 and T1
Packet Voice Trunk
Network Modules
Cisco 2600 and
3600 series
12.0(7)XK,
12.0(7)T, 12.1(2)T
or greater.
12.2(8)T1 or greater
for 2691
All Plus Feature Sets (some
IOS Plus Feature Sets require
additional DRAM and Flash
Memory)
64-96 Mbyte for
2600/2600XM
platforms
128 Mbyte for
2691 platform
64-128 Mbyte for
3600 platforms
16-32 MB
All Digital E1 and T1
Packet Voice Trunk
Network Modules
Cisco 3700 series 12.2(8)T or greater All Plus Feature Sets (some
IOS Plus Feature Sets require
additional DRAM and Flash
Memory)
128 Mbyte for
3700 platforms
32 MB
All Digital E1 and T1
Packet Voice Trunk
Network Modules
Cisco 2811,
2821, 2851
12.3(8)T4 IP Voice images and higher 256Mbyte for
2800 platforms
64MB
All Digital E1 and T1
Packet Voice Trunk
Network Modules
Cisco 3800 12.3(11)T IP Voice images and higher 256Mbyte for
2800 platforms
64MB
Please refer to the Cisco IOS
®
release notes for determining the exact flash and DRAM memory requirements.
(13 pages)
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