Cisco 1751 Datasheet page 13

– a. Each 2-port analog VIC requires 1 DSP (PVDM-256K-4)
– b. Each VIC-2BRI-NT/TE requires 2 DSPs (PVDM-256K-8)
– c. For VWICs, refer to Table 9. For example, 12 G.711 digital T1/E1 voice calls require two DSPs; 12 G.729
calls require four DSPs
– d. Total DSP requirement is the sum of a, b and c. The DSP resources can not be shared between analog VICs,
BRI VIC and VWICs.
2. For the Early Deployment (ED) releases: Cisco IOS 12.2(8)YN or later (Note: not including 12.2(11)YT) or T
train releases 12.3(1)T or later, please always refer to the DSP Calculator in the following link:
http://www.cisco.com/cgi-bin/Support/DSP/cisco_prodsel.pl
The DSP calculator optimizes the DSP resources for your configuration and suggests CLI configurations.
Table 7
DSP Firmware for each type of VICs
VIC Type
2-port Analog VICs
4-port Analog VIC
VIC-2BRI-NT/TE
T1/E1 VWICs
Table 8
Cisco IOS support for DSP firmware
Firmware Support
HC
MC
Flexi-6
1. It doesn't include Cisco 12.2(11)YT. 12.2(11)YT doesn't support MC.
2. It doesn't include Cisco 12.2(11)YT. 12.2(11)YT doesn't support Flexi-6.
3. It doesn't include Cisco 12.2(11)YT. 12.2(11)YT doesn't support Flexi-6.
Table 9 The number of channels supported by one DSP (PVDM-256K-4) per codec type
Codec HC (for analog & BRI VICs)
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Firmware Support
HC (default), MC ( starting from 12.2(8)YN)
HC, MC (default, starting from 12.2(8)YN)
HC (default for ED releases prior to 12.2(8)YN or T train releases prior to 12.3(1)T);
MC; Flexi-6 (default for ED releases 12.2(8)YN or later or T train releases 12.3(1)T or
later);
Flexi-6 (default)
IOS Release Support
In all orderable IOS Releases
ED Releases: Cisco IOS 12.2(8)YN or later
T Train Releases: Cisco IOS 12.3(1)T or later
For T1/E1 VWICs:
• ED Releases: Cisco IOS 12.2(4)YB or later
• T Train Releases: 6th releases of 12.2T or later
For VIC-2BRI-NT/TE:
• ED Releases: Cisco IOS 12.2(8)YN or later
• T Train Releases: Cisco IOS 12.3(1)T or later
Firmware
MC ( for analog & BRI VICs)
Cisco Systems, Inc.
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Flexi 6 (for VWICs & BRI VIC
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