[55843] in North American Network Operators' Group
RE: Voice over IP - performance
daemon@ATHENA.MIT.EDU (Charles Youse)
Wed Feb 12 15:24:04 2003
Date: Wed, 12 Feb 2003 15:23:30 -0500
From: "Charles Youse" <cyouse@register.com>
To: "Bill Woodcock" <woody@pch.net>
Cc: <nanog@nanog.org>
Errors-To: owner-nanog-outgoing@merit.edu
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
