asterisk users - Oct 2004 - Latency/delay on IN1002 - PA1688 phone

Hello,

I have just bought an IN1002 phone from Integrated Networks in Chine (
www.integratednetworks.com.cn). This phone is based on the 50 MHz PA1688
processor like many others and I find I have quite a lot of delay/latency/echo
with the phone when using SIP. I have noticed this when directly connecting to
my SIP provider (SIPPhone), which could be their network, but I also find the
same thing when I am just using my mini-Asterisk system without going out to my
SIP provider. I am not seeing the same degree of delay with my IAX softphone, so
I am thinking that the problem is the IN1002.

Does anyone have any ideas? The web configuration page for the phone has IAX as
a protocol, but the folks at Integrated Networks tell me this has not been fully
implemented yet. I did find that running Asterisk with the "-p"
startup option helps somewhat.

Have others found other cheap SIP/IAX hard-phones that behave better is this a
systemic problem with the PA1688 phones?

Thanks,

Chris
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