ISDN 30 Only using 4 Lines, SHowing disconnect

[phonephil]

All,

Here is the config..

IP406 3.2(54)
ISDN 30, currently using 8 Channels(lines)

The problem I am having, if more than 4 calls are made the system displays disconected.

If 4 members of staff are on the phone, if someone rings the office its dead.

I have spoken to the telco(BT) to have a line tested and they tell me my phone system is disallowing calls.. But telco are always unhelpful ;-)

Has anyone come across this?? any pointers?

thanks in advance, Phil

 

[ProviderReborn]

Ok, just check the channels that have been allowed in the PRI line group ensure these are set to 8 not 4.

Also get a monitor trace going with layers 1&2 running and get the ISDN cause disconnection codes, this will help alot to diagnose the fault.

May be worth checking call status and make sure you have no rogue modems/faxes using up your channels.

ACA - IP Office Implement
ACA - IP Telephony
CCENT - Cisco ICND1
CCNA - Working towards.

 

[phonephil]

Yeah have them set to 8 outgoing and 8 incoming...

also did a test seems that incoming is not a problem i can have 4 lines busy then still receive incoming calls

looking at the logs, i have seen a

PRN: No VoCoder is available for the dial/ring tone

i will keep diging...

 

[ProviderReborn]

What handsets are you using please?

ACA - IP Office Implement
ACA - IP Telephony
CCENT - Cisco ICND1
CCNA - Working towards.

 

[ProviderReborn]

I think not sure you are out of VCM channels are you using IP Lines/IP Phones. If so here is your problem.

ACA - IP Office Implement
ACA - IP Telephony
CCENT - Cisco ICND1
CCNA - Working towards.

 

[ProviderReborn]

Problem being here: PRN: No VoCoder is available for the dial/ring tone

ACA - IP Office Implement
ACA - IP Telephony
CCENT - Cisco ICND1
CCNA - Working towards.

 

[phonephil]

hello mate,


we are using 5610 SW IP phones..

 

[tlpeter]

Indeed no vcm channels availeble
Do you have a vcm card installed ?


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

 

[ProviderReborn]

There is your problem.
Re-connect to monitor and you will show how many vcomp channels you have. My betting this is 4.
In which case your going to need to upgrade your VCM. Or review settings for Allow Direct Media path to see if this will releave at all.

ACA - IP Office Implement
ACA - IP Telephony
CCENT - Cisco ICND1
CCNA - Working towards.

 

[phonephil]

VCM is not showing in the list of installed modules, though i am sure it was purchsed..

we are not using VOIP serice between sites but are using IP phones...

what would the voice compression module be listed as i can see in the modules..

Under the control unit it is showing...

1 IP406DS
2 Analogue POTS2
3 Digital DCP8
4 DIG DCPx30 V2

thanks

Phil

 

[tlpeter]

You can not see it there
Open monitor and look what it says right in the begin

You will see a line like this:

752950211mS PRN: LAW=A PRI=1, BRI=4, ALOG=0, ADSL=0 VCOMP=32, MDM=0, WAN=0, MODU=0 LANM=0 CkSRC=1 VMAIL=1(VER=3 TYP=1) CALLS=0(TOT=1926)


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

 

[phonephil]

here you go

PRN: LAW=A PRI=1, BRI=0, ALOG=0, ADSL=0 VCOMP=4, MDM=0, WAN=0, MODU=1 LANM=0 CkSRC=1 VMAIL=1(VER=0 TYP=1) CALLS=0(TOT=407)


as you can see it shows 4...

 

[tlpeter]

Vcomp=4

Probably there are too many calls
You can see in monitor how many there are in use


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

 

[ProviderReborn]

VCOMP=4

Right here is your issue, you need more VCM Channels buddy.

Ensure Direct media path is enabled to not use channels on IP-IP calls.

ACA - IP Office Implement
ACA - IP Telephony
CCENT - Cisco ICND1
CCNA - Working towards.

 

[phonephil]

okay just found out I need more compression, but it seems a bit harsh wehn i am using ip phones over isdn that it needs the same amount of channels..

sorry but what does this mean, many thanks

Ensure Direct media path is enabled to not use channels on IP-IP calls.

 

[phonephil]

arhh does direct media between ip phones mean its direct rather than using channels?

 

[ProviderReborn]

Correct.

ACA - IP Office Implement
ACA - IP Telephony
CCENT - Cisco ICND1
CCNA - Working towards.