Compression Mode (which to use) 5

[robspwing]

Running the IPO 500 Manager 6.2 (14). Under Extensions, Choose and extension and then under the VoIP tab
there is Automatic Select, G.711 ALAW 64K, G.711 ULAW 64k, and G.729(a) 8K CS-ACELP.

Right now ours is set to Automatic Select. Would changing this change the voice quality of our remote users? Our remote users connect via Cisco VPN and they use the Softphone 4.2.22 but the sound quality is horrible.

Just wondering

Rob

Doc, we better back up. We don't have enough road to get up to 88.

 

[Bas1234]

And the port to the Cisco PIX?

Can you see if they a 100Mb FD?

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[robspwing]

interface GigabitEthernet0/1
description <== Uplink Connection to ASA ==>
switchport access vlan 20
switchport mode access
speed 100
duplex full
no cdp enable
spanning-tree portfast

Rob

Doc, we better back up. We don't have enough road to get up to 88.

 

[Bas1234]

If you turn on Port Morroring/Monitoring on the switch and do a wireshark/ethereal trace do you see any heavy traffic?

You could also try to turn off "IGMP snooping/Multicast filter"

Also found out that some headsets could cause some bad quality. (moslty the cheap ones)

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[robspwing]

Thanks Bas1234...

I will have to research the Port Mirroring/Monitoring
I am not sure where to turn off the IGMP snooping/Multicast Filter.

We use the headsets that Plantronics suggested the SupraPlus H251N headsets.

Rob

Doc, we better back up. We don't have enough road to get up to 88.

 

[Bas1234]

We had no problems with Plantronics.

If you have a Cisco ASA (pix) try this.

fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719

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It works! Now if only I could remember what I did...
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[robspwing]

Bas1234,

What will the two commands that you posted help with, what is their purpose?

fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719

Rob

Doc, we better back up. We don't have enough road to get up to 88.

 

[Bas1234]

Here you go;

fixup protocol h323 Command
By default, the PIX Firewall inspects port 1720 connections for H.323 traffic. If you have H.323 servers operating on ports other than port 1720, use the fixup protocol h323 command to have the PIX Firewall inspect those non-standard ports for H.323 traffic. The syntax of the fixup protocol h323 command is as follows:

fixup protocol h323 port [-port ]
no fixup protocol h323 port [-port ]
clear fixup protocol h323where port[-port] is a single port or port range that the PIX Firewall will inspect for H.323 connections.

Example 9-6 demonstrates the typical use of the fixup protocol h323 command and its no form to add and delete standard and non-standard ports for H.323 traffic.

Example 9-6 Adding and Deleting Standard and Non-standard Ports for H.323
pixfirewall(config)# fixup protocol h323 1720

pixfirewall(config)# fixup protocol h323 7720-7740

pixfirewall(config)# no fixup protocol h323 1720

pixfirewall(config)# no fixup protocol h323 7720-7740



The fixup protocol h323 command causes the PIX Firewall to do the following for H.323 traffic on the indicated port:

•Perform NAT in packet payload.

•Dynamically create conduits for TCP or UDP channels.

Use the no form of the command to disable the inspection of traffic on the indicated port for H.323 connections. If the fixup protocol h323 command is not enabled for a given port, then neither outbound nor inbound H.323 will work properly on that port.

Using the clear fixup protocol h323 command without any arguments causes the PIX Firewall to clear all previous fixup protocol h323 assignments and set port 1720 back as the default

___________________________________________
It works! Now if only I could remember what I did...
___________________________________________

 

[CarGoSki]

Ford changed to left-hand-drive in the 1908 model year. A Ford catalogue from 1908 explains the benefits of placing the controls on the left side of the car:
“The control is located on the left side, the logical place, for the following reasons: Travelling along the right side of the road the steering wheel on the right side of the car made it necessary to get out on the street side and walk around the car. This is awkward and especially inconvenient if there is a lady to be considered. The control on the left allows you to step out of the car on to the curbing without having had to turn the car around.
In the matter of steering with the control on the right, the driver is farthest away from the vehicle he is passing, going in opposite direction; with it on the left side he is able to see even the wheels of the other car and easily avoids danger.”

 

[amriddle01]

That's nice Cargoski, but that only applies if you drive on the Right hand side of the road which we don't we drive on the left so the passenger gets out on the kirb also

ACS - IP Office Implement

"I'm just off to Hartlepool to buy some exploding trousers

 

[amriddle01]

So not only were you driving on the wrong side before Ford changed it you were also driving the car from the kirbside....ver silly indeed

ACS - IP Office Implement

"I'm just off to Hartlepool to buy some exploding trousers

 

[CarGoSki]

Hey now. 72% of the roads in the world are driven from the right side. If we could convince the 1.1 billion in India to change then the lefties would only have scraps!

 

[TomMills]

oh course none of this applies to andy anymore anyway

ouch!

"There's a dog in the New Zealand section

 

[Bas1234]

In 2013 they start an experiment for driving to the left side in the UK. They will start with the Trucks first.

___________________________________________
It works! Now if only I could remember what I did...
___________________________________________

 

[CarGoSki]

Trucks with sharp pointy things attached to the front.

 

[Bas1234]

Sorry meant right side..(-:

___________________________________________
It works! Now if only I could remember what I did...
___________________________________________

 

[robspwing]

I ran a wireshark and it doesnt look like the voice traffic is marked with the EF bit like our QOS is setup for (class-map qos_cm, match dscp ef) on the ASA.
I would think the voice traffic would not be getting prioritized on the ASA.

Rob

Doc, we better back up. We don't have enough road to get up to 88.

 

[Westi]

it should not make a big difference though except if you run the bandwidth up high, I doubt that you use all bandwidth all the time to the max except if you feed a lot of torrents maybe it is just a bottleneck between the two providers you use you should try and have an assessment done to see the availability of bandwidth and delay between the two sites as this comes down to a connectivity problem.

Joe W.

FHandw., ACS

If you can't be good, be good at it!

 

[robspwing]

This is what AT&T told me to do:
The T1 is currently set at 90/10 COS across our network. That is 90% is set to COS 1 (highest service class) and 10% is set to COS4.

Turn QoS on in the asa/router at HQ.

Create 2 tunnels with the Cisco VPN Client-1 for data and 1 for VoIP.

Prioritize the VoIP traffic in/out of the tunnel at HQ. This should increase the quality of the voice services.

Does this sound right?
(QoS is on at the ASA)

Rob

Doc, we better back up. We don't have enough road to get up to 88.

 

[tlpeter]

Sounds good to me

ACS - Implement IP Office
ACA - Implement IP Telephony -- ACA - Design IP Telephony
ACA - Voice Services Management
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Women and cats can do as they please and men and dogs should relax and get used to the idea!