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Multicast Streaming to IP Phones
Answer
7/19/10 6:43 PM
Dear All,
 
I am developing an application that streams a wav file to 20 IP Phones using the JMF & AVTransmit class that was sent on this forum before.
 
The problem is:
 
1- When sending the wav file to the IP Phone using its unicast IP Address:
and at the phone: RTPRX:unicastip:20480  (it works great.)
 
 
2- When sending the wav file to 3 IP Phones in the same vlan over multicast IP Address
and at the phone: RTPMRX:multicastip:20480  (it works great.)
 
 
3- I enabled the muticast on the switch then i sent the wav file over a multicast ip address, the phones which are vlan different from  my transmitting server vlan don't play the file at all.... but the phones in the same vlan with my transmitting server still can play the file...
 
please help
 
Thanks alot,
 
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RE: Multicast Streaming to IP Phones
Answer
8/13/10 3:38 PM as a reply to Marwa Ads.
Hi Marwa;
 
Did you ever find the answer to this?  I am seeing the same problem, and I'm pretty sure Multicast is configured on the network correctly.
 
Thanks;
Paul


Dear All,
 
I am developing an application that streams a wav file to 20 IP Phones using the JMF & AVTransmit class that was sent on this forum before.
 
The problem is:
 
1- When sending the wav file to the IP Phone using its unicast IP Address:
and at the phone: RTPRX:unicastip:20480  (it works great.)
 
 
2- When sending the wav file to 3 IP Phones in the same vlan over multicast IP Address
and at the phone: RTPMRX:multicastip:20480  (it works great.)
 
 
3- I enabled the muticast on the switch then i sent the wav file over a multicast ip address, the phones which are vlan different from  my transmitting server vlan don't play the file at all.... but the phones in the same vlan with my transmitting server still can play the file...
 
please help
 
Thanks alot,
 
Flag

RE: Multicast Streaming to IP Phones
Answer
8/13/10 5:03 PM as a reply to Paul Volkaerts.
Hi Paul,
No i haven't found a solution yet but i found an issue,
 
I took a capture from the packets while streaming the multicast sound, I found the TTL = 1 .. although i increased the TTL in the AVTransmit class and made it 64 ... so it seems that there's a problem in the JMF with the multicast...
 
I am trying to find another solution for streaming rather than AVTransmit.
 
Best Regards,
Marwa
 
 
Hi Marwa;
 
Did you ever find the answer to this?  I am seeing the same problem, and I'm pretty sure Multicast is configured on the network correctly.
Thanks;
Paul


Dear All,
 
I am developing an application that streams a wav file to 20 IP Phones using the JMF & AVTransmit class that was sent on this forum before.
 
The problem is:
 
1- When sending the wav file to the IP Phone using its unicast IP Address:
and at the phone: RTPRX:unicastip:20480  (it works great.)
 
 
2- When sending the wav file to 3 IP Phones in the same vlan over multicast IP Address
and at the phone: RTPMRX:multicastip:20480  (it works great.)
 
 
3- I enabled the muticast on the switch then i sent the wav file over a multicast ip address, the phones which are vlan different from  my transmitting server vlan don't play the file at all.... but the phones in the same vlan with my transmitting server still can play the file...
 
please help
 
Thanks alot,
 
Flag

RE: Multicast Streaming to IP Phones
Answer
8/14/10 9:31 PM as a reply to Marwa Ads.
I'm not using JMF, I have a Java application.  Initially I was setting TTL to 1 too, so I changed this to 32.  There was also a Linux bug I was hitting that prevented the TTL being set which requires you to disable IPv6.  But now I can see on a network trace that TTL is set to 32, yet the phone still does not play the media if it is on a different VLAN.
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RE: Multicast Streaming to IP Phones
Answer
3/24/11 2:05 PM as a reply to Marwa Ads.
Hi Marwa,
 
How did you get the Unicast to work? Please provide sample.
 
Thanks in advance,
Chandan
 
Dear All,
 
I am developing an application that streams a wav file to 20 IP Phones using the JMF & AVTransmit class that was sent on this forum before.
 
The problem is:
 
1- When sending the wav file to the IP Phone using its unicast IP Address:
and at the phone: RTPRX:unicastip:20480  (it works great.)
 
 
2- When sending the wav file to 3 IP Phones in the same vlan over multicast IP Address
and at the phone: RTPMRX:multicastip:20480  (it works great.)
 
 
3- I enabled the muticast on the switch then i sent the wav file over a multicast ip address, the phones which are vlan different from  my transmitting server vlan don't play the file at all.... but the phones in the same vlan with my transmitting server still can play the file...
 
please help
 
Thanks alot,
 
Flag