Telnet with PowerShell - powershell

Question

I use this powershell script for getting output stream of telnet request.
Function Get-Telnet {
Param (
[Parameter(ValueFromPipeline=$true)]
[string[]]$Commands = #(),
[string]$RemoteHost = "0.0.0.0",
[string]$Port = "23",
[int]$WaitTime = 1000,
[string]$OutputPath = "C:\temp\telnet_output.log"
)
#Attach to the remote device, setup streaming requirements
$Socket = New-Object System.Net.Sockets.TcpClient($RemoteHost, $Port)
if ($Socket) {
$Stream = $Socket.GetStream()
$Writer = New-Object System.IO.StreamWriter($Stream)
$Buffer = New-Object System.Byte[] 1024
$Encoding = New-Object System.Text.AsciiEncoding
#Now start issuing the commands
foreach ($Command in $Commands) {
$Writer.WriteLine($Command)
$Writer.Flush()
Start-Sleep -Milliseconds $WaitTime
}
#All commands issued, but since the last command is usually going to be
#the longest let's wait a little longer for it to finish
Start-Sleep -Milliseconds ($WaitTime * 4)
$Result = ""
#Save all the results
while ($Stream.DataAvailable) {
$Read = $Stream.Read($Buffer, 0, 1024)
$Result += ($Encoding.GetString($Buffer, 0, $Read))
}
} else {
$Result = "Unable to connect to host: $($RemoteHost):$Port"
}
#Done, now save the results to a file
#$Result | Out-File $OutputPath
$Result
}
This works for a Cisco switch and a telnet server, but for the Alcatel OmniPCX and the HPUX the stream reading is empty.