AudioCodes MediaPack MP-11 Series Troubleshooting Manual page 21

Troubleshooting Guide
Possible Cause
5. The device does not receive a
SIP INVITE message from the
remote UA.
6. Syslog Warning/Error displays
"Cant find Endpoint"
7. The device is operating behind
NAT (a STUN server is not
available).
Version 5.2/5.4
If no SIP INVITE message is received from the remote UA,
notify the problem to the remote UA.
To check whether the device receives SIP INVITE
messages:
Make an IP call to the device from the remote UA.
1
Open the Syslog (refer to ''Syslog'' on page 68), and
2
ensure that an INVITE is displayed (see example below):
---- Incoming SIP Message from
10.33.6.101:5060 ----
INVITE sip:588@10.33.4.179;user=phone
SIP/2.0
Via: SIP/2.0/UDP
10.33.6.101;branch=z9hG4bKac302222496
Max-Forwards: 70
If a SIP INVITE message is received but the Syslog shows a
warning that an endpoint cannot be located, for example:
WARNING: (lgr_TrnkGrp)(61) !! [ERROR]
#0:TrunkGroup::AllocateEndPoint- Can't
find EndPoint for phone number 2000
WARNING: (lgr_psbrdif)(62) !! [ERROR]
MotherBoard::GetEndPoint- Can't find
EndPoint for Dest:2000 Source:100
SourceIp:13d2e50
WARNING: (lgr_call)(63) !! [ERROR]
Call::GetEndPoint- Can't find endpoint for
phone number 2000
Check the configurations of the following:
'IP to Trunk/Hunt Group Routing Table' page.
Channel Select Mode in the 'Trunk/Hunt Group Settings'
page (Web path SW Ver. 5.2: Protocol Management
menu > Trunk Group Settings; Web path SW Ver. 5.4
and later: Configuration tab > Protocol Configuration
menu > Trunk Group submenu > Trunk Group Settings).
The solution depends on one the following scenarios:
If a SIP INVITE message is not received: Check that the
Firewall/NAT server forwards incoming traffic from the
public IP address to the internal IP address of the
device.
If a SIP INVITE message is received and the device
responds with 200 OK:
Verify that the Firewall/NAT server changes the IP
address, declared in the SDP, to a public one. If the
Firewall/NAT server does not change the IP address
declared in the SDP, configure the device to perform
this, using the 'NAT IP Address' parameter. Configure
the public IP address of the device on the Web
interface's 'IP Settings' page (Web path SW Ver. 5.2:
Advanced Configuration menu > Network Settings
submenu > IP Settings; Web path SW Ver. 5.4 and later:
Configuration tab > Network Settings menu > IP
Settings).
21
4. Call Setup
Solution
January 2009