I have two 3300’s (one a 3300MX and the other a first generation 3300LX) running version 7.1.3.4 that I would like to test ICP trunking/compression on. Right now the majority of phones on both systems are DNI phones hooked up via an SX-2000 Peripheral node. Working with my vendor things needed to get this operational along with E2T are Quad DSP, compression licenses, and system IP networking license. My question is regarding the 3300’s and their ability to support this. The vendor is telling me I must replace the 3300LX because while it will support IP trunking it will not support compression. Is anyone running compression through an older LX unit or do they in fact need to be replaced? Any information is greatly appreciated.
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3300LX and ICP trunking/compression?
- Thread starter fonejack
- Start date
I think either the vendor or the message is being confused.
The LX is fine with compression. I believe it may not be compatable with the latest generation of DSP modules but that is all. When it comes to compression it is important to understand what type of call is being compressed. Anything crossing the E2T barrier will require licensing. This includes all of your DNI sets and trunking. A call over IP trunking from an IP phone to an IP phone does not require licensing. When you enable compression the system allocates DSP resources accordingly. The Tech Handbook is a good resource to use to design the system properly and ensure you have sufficient resources to handle the traffic.
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Occam's Razor - All things being equal, the simplest solution is the right one.
The LX is fine with compression. I believe it may not be compatable with the latest generation of DSP modules but that is all. When it comes to compression it is important to understand what type of call is being compressed. Anything crossing the E2T barrier will require licensing. This includes all of your DNI sets and trunking. A call over IP trunking from an IP phone to an IP phone does not require licensing. When you enable compression the system allocates DSP resources accordingly. The Tech Handbook is a good resource to use to design the system properly and ensure you have sufficient resources to handle the traffic.
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Occam's Razor - All things being equal, the simplest solution is the right one.
It should work. Compression licensing will be required on both sides. Great deal of this cost goes to G.729 patent holders. If you have enough bandwidth you may not need compression licenses to go with G.711 codec which requires about 80kbps per call. G.729 will allow you to use about 32kbps per call. IP network license will enable IP trunking feature for any (virtually) number of calls.
IrwinMFletcher
Programmer
Both the LX and the MX support compression, however you will need (at least) a 21161 DSP module in each (actually you will need at least 2 DSP modules, one of which needs to be a 21161). Perhaps that's why they are saying it won't work, if you don't have enough DSPs. The LX requires a minimum of 4 DSPs for basic telephony (digit receivers, conference, etc) and will only allow compression after this requirement is fulfilled.
For a call from one TDM endpoint on a controller, over an IP trunk, to another TDM endpoint on another controller it will consume 1 compression license one EACH controller.
For a call from one TDM endpoint on a controller, over an IP trunk, to another TDM endpoint on another controller it will consume 1 compression license one EACH controller.
- Thread starter
- #5
I’m a little confused on the DSP issue, in a normal setup I would need one DSP module in each location that could have the ability to support 32 channels but since I have the LX I still only need two DSP modules but the LX uses four DSP channels per call? If that is the case then how many compression licensees would I need if I wanted to complete 8 calls across the link 8 or 32? Also you mention a specific DSP module 21161, does that mean anything newer then that is not compatible? Again I appreciate the help.
IrwinMFletcher
Programmer
Compression is only supported on two DSP types, the 21161 and the C5510. The C5510 (also called DSPII card) is NOT supported on the LX platform. Go to ESM->Maint&Diag->Hardware Modules to see what you have in your systems.
One 21161 DSP (i.e a physical chip on the board) can handle up to 8 compression sessions, typically the modules have 4 of these dsps on them, again check your hardware profiles and it will tell you. So that's why it's typically said that one DSP module will do 32 compression, this is however only valid when talking about Quad 21161 dsp modules, the C5510 is another beast entirely.
On an LX, you need 4 dsps (i.e. one quad module) to support regular telephony resources for the entire system (these can be 21161 or 21061 dsps). Once this condition is met, any other 21161 dsps can be used for compression.
If you want to make 8 calls you will need 8 compression licenses on each of the controllers.
One 21161 DSP (i.e a physical chip on the board) can handle up to 8 compression sessions, typically the modules have 4 of these dsps on them, again check your hardware profiles and it will tell you. So that's why it's typically said that one DSP module will do 32 compression, this is however only valid when talking about Quad 21161 dsp modules, the C5510 is another beast entirely.
On an LX, you need 4 dsps (i.e. one quad module) to support regular telephony resources for the entire system (these can be 21161 or 21061 dsps). Once this condition is met, any other 21161 dsps can be used for compression.
If you want to make 8 calls you will need 8 compression licenses on each of the controllers.
- Thread starter
- #7
LukeBreuer
Vendor
I'm trying to setup compression between IP-Phone to IP phone on the same LAN.
One phone is in zone 2 the other is zone 3, also I have intra zone compression to yes. Zone assignment
Method Zone ID
1001 1 9 9 9 1 1 1 Manual 2 1
1002 1 9 9 9 1 1 1 Manual 3 1
The Tech Handbook tell's me.
A call from an IP phone to an IP phone does not require licensing
If got the form Voice Quality Monitoring: True
After making a call from zone 2 to 3 I look in the form Voice Quality Statistics
24 2009/Feb/16 13:58:19 1 1002 148 0 0 0 3 True 08:00:0f:3a:f9:d7 10.15.8.36 9000 6961 10.15.8.0 10.15.8.35 50462 IP Set 5330 IP G.711 (A-Law)
The call stays on G.711 not on G927
Im running single site 9.0.1.17 / 9.0 UR1
Can anyone help me
One phone is in zone 2 the other is zone 3, also I have intra zone compression to yes. Zone assignment
Method Zone ID
1001 1 9 9 9 1 1 1 Manual 2 1
1002 1 9 9 9 1 1 1 Manual 3 1
The Tech Handbook tell's me.
A call from an IP phone to an IP phone does not require licensing
If got the form Voice Quality Monitoring: True
After making a call from zone 2 to 3 I look in the form Voice Quality Statistics
24 2009/Feb/16 13:58:19 1 1002 148 0 0 0 3 True 08:00:0f:3a:f9:d7 10.15.8.36 9000 6961 10.15.8.0 10.15.8.35 50462 IP Set 5330 IP G.711 (A-Law)
The call stays on G.711 not on G927
Im running single site 9.0.1.17 / 9.0 UR1
Can anyone help me
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