[Asterisk-Users] Nearing my wits end....bad switch???

[Marty Mastera]

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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