[Asterisk-Users] Solution to my Grandstream lockups

[Barton Hodges]

Like many others on this list, I had been experiencing periodic
lockups with my Grandstream products (Handytone 286 ATA & BudgeTone
101).  The lockups consisted of seemingly dead devices, no dialtone or
response, until I power cycled via software or hardware.  The
workaround had been to reboot the device every 30 minutes with a cron
job.  I contacted Grandstream and although they didn't have a specific
answer, they alluded to the fact that lack of registration might be
the cause.

I performed the following:

Increased the "Register Expiration" in the device to 60 minutes
Increased "maxexpirey" and "defaultexpirey" to 3800 seconds
Configured the device with a static IP address
Added defaultip=172.16.1.123 and host=dynamic to sip.conf

It has now been running for 48 hours without a single lockup.  Here
are some of the settings that I am using:

In Grandstream:

Register Expiration: 60
SIP Registration: Yes
keep-alive interval: 20
SUBSCRIBE for MWI: No

In Sip.conf:

maxexpirey=3800
defaultexpirey=3800

[123]
callerid="From Me" <123>
username=123
mailbox=123
secret=password
defaultip=172.16.1.123
host=dynamic
context=mycontext
qualify=no
type=friend
dtmfmode=inband
canreinvite=no
incominglimit=1
insecure=yes
callgroup=1
pickupgroup=1
nat=0
disallow=all
allow=ulaw
deny=0.0.0.0/0.0.0.0
permit=172.16.1.0/255.255.255.0

Barton