Blind Transfer Drops after 30 second

General Help
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1

Hi Fellas,
I have a situation
We have an issabel server which has 2 NICs
NIC1 for the connection to providers Intranet (10.105.0.0 network)
NIC2 for our local network and IP-Phones (172.16.0.0 network)
We have register sip accounts as a trunk with this configuration:
username=2222222
type=peer
trustrpid=yes
sendrpid=yes
secret=222222
qualify=yes
insecure=port,invite
host=10.105.X.X
disallow=all
allow=ulaw&alaw&gsm

and in my advanced sip i have:
NAT=Route
IPCONF=Static
ExternalIP: 10.105.Y.Y (MY NIC1 IP)
Local Net: 172.16.0.0 255.255.255.0
Reinvite Behavior: Yes

Everything works fine, but when i blind transfer a call to another phone or when i set always forward to another phone, the call will drop afters 30 second

2

I usually find “30 seconds” is an indicator of a router/NAT dropping your connection. This is, in fact, a sparsely common problem (it comes up several times a year, but it’s not like an every day thing).

If you search back through the Archives, you find a search for “transfer 30 second” should get you on the right track pretty quickly.

3

Hi
Thnx
I have search for it for a long time but still no luck
Problem is i dont have any modem or firewall in front of it

4

You do not have a router? You are just connecting the server directly to the carrier service?

5

The port is bridge and then connected to prividers intranet, ip address of the server is in the network of the providers switch

6

I would recommend reviewing the router logs and/or doing a wireshark on the traffic during a test call to see why it is dropping.

7

From sip debug i saw something, right before dropping the call that from provider switch a “hello” message is coming but i dont know if its because of that

8

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