Grasping at straws
here...is anyone using a Dell PowerConnect 2224 24-port unmanaged 10/100 switch
in a deployment?
I have two separate
asterisk installations with bad one-way audio where the only common elements
left are the Dell switches and Polycom IP-500 phones. Two different ITSPs
- one location uses IAX2 to the outside world, the other SIP. Two
different bandwidth providers, one SDSL 1.5 Mbps and the other T1. Both
locations had Dell servers (different models though), but I've since replaced
one of them with a clone with no improvement. In both locations the
computers were plugged into the switch port on the phones and I've tried
separating them with no luck. The problem occurs with or without a high
network load present and can occur with only one person in the office and using
the phone...
I'm grasping at
straws here, but maybe both switches are in some way either faulty or not
suitable for the task? Both were purchased in the same timeframe in March
2005...
The remote party
hears my users fine, but my users get bad audio inbound from the remote
party...below are the specifics for each location:
Location
1:
- SDSL 1.5 Mpbs with
static IP, Netopia 4652 SDSL router (enabled "Prioritize Delay Sensitive Data"
to recognize tos=lowdelay per Netopia support)
- Dell PowerEdge SC420 with TDM04B (currently only using one
port. the single analog line is call forward on busy to my IAX
provider)
- Asterisk
CVS-v1-0-02/22/05 (AAH 0.6) using IAX
to connect to my provider over the public internet - I have run pings for an
extended period of time against my provider's server and get no packet
loss.
- In IAX.conf:
tos=lowdelay, jitterbuffer=yes, also enabled "Prioritize Delay Sensitive Data"
on the Netopia to support tos=lowdelay per Netopia support
- Average ping time
to my provider: 160 ms with no packet loss
- 8 Polycom IP-500's
running SIP 1.4.1.0040 and bootrom 2.6.1 using ulaw only
- Small Business
Server 2003 set up as DC for the network
- Two network laser
printers
- Dell 2224 24-port unmanaged switch (all phones are home
run back to a patch panel, patched from there into a switch port. The DSL
modem, printers and server are patched into the switch in the same
way)
- 8 pc's running XP
Pro, all plugged into the switch port on the back of the
IP-500's
Location
2:
- Full rate data
T1
- Dell PowerEdge
SC1420 (Since replaced with a clone
pc) with no TDM hardware at all (this location connects SIP directly
to the T1 providers Broadsoft switch and
does not go over the public internet)
- Asterisk
1.0.7 (AAH 0.9) - using SIP to
connect with my provider (not across public internet, not natted since the Cisco
IAD does the SIP mangling for us)
- Average ping time
to the broadsoft switch: 42 ms
- 8 Polycom IP-500's
running SIP 1.4.1.0040 and bootrom 2.6.1 using ulaw only
- Small Business
Server 2003 set up as DC for the network
- One network
printer
- Dell 2224 24-port unmanaged switch (all phones are home
run back to a patch panel, patched from there into a switch port. The DSL
modem, printers and server are patched into the switch in the same
way)
- 8 pc's running XP
Pro, all plugged into the switch port on the back of the
IP-500's
Can anyone throw me
a bone??? I'm willing to try anything, my next steps are to run a new cat5 along
the floor from the switch to one of the phones to eliminate the wiring in the
walls, and if necessary to purchase a managed switch that I can do QOS
on...
Thank
you
Marty
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