HT503 Direct IP Call - Analogue extension to VoIP device


#1

Hi,

I have a VoIP Public Announcement device that I would like to call via an analogue extension from the PABX.

Can I configure the HT503 to receive an analogue extension call and direct IP call the VoIP device on the other side, without SIP registration?

It seems simple but I might be misunderstanding something.

I can direct IP call the VoIP PA device from another VoIP phone and the sounds goes out on the amplifier, but I cannot get the HT503 to make a direct IP call to the VoIP PA device

NEC SL1000 analogue ext —> Grandstream HT503 —> Snom PA1 —> PA Amplifier

The HT503 receives the call, the Line light activates, I can hear its dial tone, but I cannot get it to direct IP call the VoIP device when it receives a call.

I was told this should work, but after fiddling half the day I am not so sure anymore.


#2

I do not know the equipment you list, often keep that sometimes instead of registering with credentials some equipment want to register in peer, check if it’s your case.


#3

Wrong configuration Snom PA1 do not support IP calling (i do not see any option to turn off register - manual have like 1/10 options from gateway).


#4

Thank you @damiano70. we will recheck our peer config. I am sure its how we have configured it but I might have missed something, I am not really proficient in telephony configuration.

@Marcin, I am afraid you are mistaken.

The Snom PA1 does indeed support direct IP calling, it is how I tested if the device actually works. I can even make a video of me doing it and upload it if you think I am lying.

I reset a normal VoIP handset to factory defaults, plugged it into the network, it received an IP address via DHCP with no SIP server or registration on the network. I dialed the Snom PA1 IP address from the VoIP phone for e.g. 192 * 168 * 2 * 100 and the Snom PA1 answered immediately and played the audio out its Line Out port as required.

I am sure the HT503 can do Direct IP calling and without SIP registration as the configuration options are in its config menu, I am just not sure how it must be done.

I have removed the Snom PA1 and just tried getting the HT503 to call a normal VoIP phone instead, but I get the same results. The HT503 answers and gives dial tone for a few seconds but nothing gets transferred to IP.


#5

Sorry there is missing word:
"Wrong configuration OR Snom PA1 "

For 503 refer to this manual:


#6

more manuals :’( /cry

Thank you @Marcin. We did follow this yesterday, but I will reset everything and try it again, maybe I missed something.

So does this mean the HT503 should in theory support what I am attempting to do? I just don’t want to be wasting my time because I am misunderstanding something about the devices capabilities.


#7

Yes i configured it with GS phones, some random gateways etc.
For more perspective i suggest running syslog with SIP (from HT) to your PC as server.
You can install Visual syslog server on PC to catch them. You will see packets at least.


#8

I reset the HT503 to factory defaults…

It answers a call on the FXO port and it gives me a dial tone, I can press *** then 47 and it prompts to enter the IP

As soon as I configure the device it no longer answers calls, even changing one thing. Changing it back does not fix the problem, only another factory reset.

After a few resets, I could eventually configure the device, but as soon as I enter and save the User ID under Basic Settings it does not answer a call anymore. If I reset the device it answers calls again.

Sometimes all the fields did not reset after a factory reset, the only thing I can think of doing different was the length of time I held the reset button.

Firmware upgrades to .13 also did not stick, it stays at .12

Is this device broken?