I'm assuming in the case of, e.g., a 2650 + dual T-1 PRI interface can actually encode/decode 48 simultaneous g729a voice streams without issues? Any idea what the CPU utilisation is - or is this handled in separate DSPs in the voice network module itself? C. -----Original Message----- From: Bill Woodcock [mailto:woody@pch.net] Sent: Wednesday, February 12, 2003 2:43 PM To: Charles Youse Cc: nanog@nanog.org Subject: Re: Voice over IP - performance > Does anyone have any real-world figures for VoIP performance on > various platforms? In other words, how many calls can an otherwise > unused e.g., Cisco 2600 be expected to handle if it's the conversion > point from trunked voice calls to IP. Some rough numbers for > different codecs on different hardware would be very useful. Most > specifically I'm interested in Cisco router platforms but other > vendor stats would be appreciated as well. Actually I just ran the dollars-per-simultaneous-call numbers for different models for some friends. I'll append it. Basically, if you run g711, you're limited by the number of PRI channels on the box. If you run g729a, you're limited by the number of DSPs you can fit in the box. The numbers I ran were assuming g729a. -Bill Cost per Package which can handle 23 simultaneous calls: call CISCO1760 10/100 Modular Router $1,595 VWIC-1MFT-T1 1-Port RJ-48 Multiflex T1 $1,300 PVDM-256K-12 3-DSP Module (9 calls) $1,200 PVDM-256K-20HD 5-DSP Module (15 calls) $4,000 Total $8,095 $352 Different package which can handle 23 simultaneous calls: CISCO2650 10/100 Modular Router $3,295 NM-HDV-1T1-24E Single-Port T1 Voice NM $9,100 Total $12,395 $539 Package which can handle 45 simultaneous calls: CISCO2650 10/100 Modular Router $3,295 NM-HDV-2T1-48 Dual-Port T1 Voice NM $9,800 Total $13,095 $291 Package which can handle 46 simultaneous calls: CISCO2650 10/100 Modular Router $3,295 NM-HDV-2T1-48 Dual-Port T1 Voice NM $9,800 PVDM-256K-20HD 5-DSP Module (15 calls) $4,000 Total $17,095 $372 Upgradeable package which can handle 46 simultaneous calls: AS535-2T1-48-AC-V AS5350-V/2T1 $18,900 $411 Package which can handle 92 simultaneous calls: AS535-4T1-96-AC-V AS5350-V/4T1 $33,600 $366 Package which can handle 184 simultaneous calls: AS535-8T1-192-AC-V AS5350-V/8T1 $58,700 $319 Upgradeable package which can handle 184 simultaneous calls: AS54HPX-8T1-192AC AS5400HPX/8T1 $65,500 $356 Package which can handle 644 simultaneous calls: AS54HPX-CT3-648AC AS5400HPX/CT3 $170,300 $265