Specifications

1-4
Cisco IOS Telephony Service, Version 2.02
Chapter 1 Cisco IOS Telephony Service Overview
Prerequisites
Prerequisites
License Requirements
You must purchase a feature license to turn on this feature. You also need an account on Cisco.com to
access Cisco IP phone firmware.
Memory Requirements
Table 1-1 list the Cisco platforms, maximum number of Cisco IP phones, maximum number of directory
numbers (DNs) or virtual voice ports, and memory requirements for Cisco IOS Release 12.2(13)T.
Note Although Cisco IOS software can provide a higher number of DNs for some of these platforms, the
higher limitation may not apply to your platform due to memory restrictions. We recommend that you
follow the guidelines in the Specifications tables to configure your network.
Table 1-1 Specifications for Version 2.02 Released in 12.2(13)T
Cisco Platform
Maximum
Cisco IP
Phones
Maximum
DNs or
Virtual
Ports
Minimum
DRAM
Memory
Recommended
DRAM
Memory
Minimum
Flash
Memory
Recommended
Flash
Memory
Cisco IOS
Release
Cisco 1751 routers 24 120 64 MB 96 MB 32 MB 32 MB 12.2(13)T
Cisco 1760 routers 24 120 64 MB 96 MB 32 MB 32 MB 12.2(13)T
Cisco 2600-XM
1
series
1. Cisco 2610-MX, Cisco 2611-XM, Cisco 2620-XM, and Cisco 2611-XM
24 96 96 MB 96 MB 32 MB 32 MB 12.2(13)T
Cisco 2650, Cisco 2651,
Cisco 2650-XM, and
Cisco 2651-XM
48 192 96 MB 96 MB 32 MB 32 MB 12.2(13)T
Cisco 3640 and
Cisco 3640A routers
48 288 96 MB 96 MB 32 MB 32 MB 12.2(13)T
Cisco 3660 routers 48 288 96 MB 128 MB 32 MB 32 MB 12.2(13)T
Cisco 2691 router 48 288 128 MB 128 MB 32 MB 32 MB 12.2(13)T
Cisco 3725 routers 48 288 128 MB 128 MB 32 MB 32 MB 12.2(13)T
Cisco 3745 routers 48 288 128 MB 128 MB 32 MB 32 MB 12.2(13)T
Cisco Catalyst 4000 family
access gateway modules
2
2. For IP Plus Image the minimum memory is 64 MB; for Enterprise Plus image the recommended memory is 128 MB.
24 48 64 MB 64 MB 32 MB 32 MB 12.2(13)T
Cisco Catalyst 4224 access
gateway switches
48 192 128 MB 128 MB 48 MB 48 MB 12.2(13)T
Cisco IAD2400 series IADs 24 120 64 MB 96 MB 32 MB 32 MB 12.2(13)T