Voice over IP - performance
Charles Youse
cyouse at register.com
Wed Feb 12 20:23:30 UTC 2003
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 at pch.net]
Sent: Wednesday, February 12, 2003 2:43 PM
To: Charles Youse
Cc: nanog at 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
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