SCN connectivity and reliabiltiy issue 1

[stivtaber]

Hi guys

Just set up an IPOffice SCN on 2 ip500s, with cable internet 5mb download and .6mb upload speed (both offices - tested), main office IP500 is on 8 channel PRI. Using newest firmware on IP500.

We are experiencing very odd results while testing the setup:

1) cannot always make calls out:
Sometime I am able to make calls and connect, but they drop after 1-5 seconds (disconnect)

2) Calls connect but there is no voice sounds coming through receiver:
you can actually hear DTMF from both ends, but no voice.

3)If there is a connected call you cannot place onther call.

4) Connected calls lose voice after several seconds:
If someone presses a phone and sends a DTMF across the call the voice will come back. Likewise if connection quality is poor (echo or lag) and a DTMF is sent quality improves.

We have swapped slots and VCM modules to ensure it was not the hardware. Done several reboots and power cycles, and been through the config several times.

Any suggestions or has anyone experienced this type of thing before?

Thanks,
Steve

 

[Bas1234]

How is your SCN setup?
What version...what is your latest?
Are you using IP Phones?

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

 

[amriddle01]

Watch the calls in system status, what are the calls stats as far as jitter, packet loss etc are concerned? What kind of QoS/Traffic shaping are you doing?

ACS - IP Office Implement

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

 

[stivtaber]

All IP500's at 4.2(14), on broadband modem.

SCN setup like this:

****SiteA****
IP500: 10.11.1.240 LAN1
Gateway: 10.11.1.1
Extensions: 2xx

IPLine:
Line# 17
Incomming/Outgoning Group: 17
Gateway IP: 10.11.3.240
Voice networking enabled

IPRoute:
IP: 10.11.3.240
Mask: 255.255.255.0
Gateway: 10.11.1.1
Destination: LAN1

Shortcode:
Code: 3xx
Action: Dial
Number: .
Line Grp: 17

****SiteB****
IP500 - 10.11.3.240 LAN1
Gateway: 10.11.3.1
Extesnions: 3xx

IPLine:
Line# 12
Incomming/Outgoning Group: 12
Gateway IP: 10.11.1.240
Voice networking enabled

IPRoute:
IP: 10.11.1.240
Mask: 255.255.255.0
Gateway: 10.11.3.1
Destination: LAN1

Shortcode:
Code: 2xx
Action: Dial
Number: .
Line Grp: 12

 

[stivtaber]

No IP Phones. All DS, mix of 5410 and 5402.

Cheers,
Steve

 

[stivtaber]

No QOS. We dont manage or have access to the routers and other network hardware. We've been informed that the necessary ports are all open in the right diretcions.

Will post some monitor details shortly.

Steve

 

[mattKnight]

1) Potentially a congestion issue - how many voice networking licences do you have? How many VCM channels do you have? What sort of handsets are you using. Is this purely internal (i.e. site to site) calls or outbound?

2) Sounds like a routing issue or port blocking, or at least it is a classic symptom of it. Are you sure that your routes are 100% correct (i.e.

IP: 10.11.1.240 personally I'd use 10.11.1.0

Mask: 255.255.255.0 or 255.255.255.255

3) Congestion or lack of call appearance keys
4) TBH sounds like Voip running across the

http://www...

Gateway: 10.11.3.1
Destination: LAN1

but that may be just style)

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[mattKnight]

Repost - I goofed up my reply to the last time

1) Potentially a congestion issue - how many voice networking licences do you have? How many VCM channels do you have? What sort of handsets are you using. Is this purely internal (i.e. site to site) calls or outbound?

2) Sounds like a routing issue or port blocking, or at least it is a classic symptom of it. Are you sure that your routes are 100% correct (i.e.

IP: 10.11.1.240 personally I'd use 10.11.1.0

Mask: 255.255.255.0 or 255.255.255.255
Gateway: 10.11.3.1
Destination: LAN1

but that may be just style)
3) Congestion or lack of call appearance keys
4) TBH sounds like Voip running across the

http://www...

Take Care

Matt
I have always wished that my computer would be as easy to use as my telephone.
My wish has come true. I no longer know how to use my telephone.

 

[stivtaber]

To mattKnight:

1) Only myself and my partner testing currently. We are well provisioned for licenses and channels though.

2) Just informed that there might be an issue with the router, it seems to dropping packets on port 49152 (this might be important )

3) There are sufficient call appearences (3 on the 5410 we are testing with)

4) We have sites running perfectly with less bandwidth in metro area with more network traffic.

to amriddle01

Jitter: 3000 - 4000
Packet Loss: 0

 

[amriddle01]

Wow, that's a LOT of jitter, really you want it below 200 for a reasonable call quality.

ACS - IP Office Implement

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

 

[stivtaber]

Any thoughts on how to reduce the jitter using the IP500?

Steve

 

[Bas1234]

Is QOS over the VPN connection set?

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

 

[Bas1234]

Sorry, didn't see...you're not using QOS or that you know of.

What Codec are you using....try G729 on both SCN ends....don't leave it on "auto".

Only tick out of band DTMF.

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