I'm in the process of choosing the right ISR for an implementation that's only going to be terminating PRIs (not routing data vlan traffic.) The different model ISRs have different interfaces, so I started to wonder exactly how many voice streams could be processed throug a given interface and a given codec. Can someone tell me if this looks correct?
1.54 Mbps (T1)
19.2 audio stream or 9.6 simulataneous audio conversations
64 audio streams or 32 simulataneous audio conversations
100 Mbps (FastEthernet)
1280 audio streams or 640 simultaneous audio conversations
4266.66 audio streams or 2133.33 simultaneous audio conversations
1000 Mbps (Gig Ethernet)
12800 audio streams or 6400 simultaneous audio conversations
42666.66 audio streams or 21333.33 or simultaneous audio conversations
I'm aware that there are greater constraints in the ISRs, such as their capacity to process the traffic and that there are limitation on the Packets Per Second they can process. However, if processing is not an issue does this math look reasonable?
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Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...