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New Member

Netmeeting problems when calling via PSTN

When I call from Netmeeting to an end user via PSTN

the call is cleared (Normal cleared) after connection.

From a IP phone it works fine !!

See below 1) config extract and 2) debug isdn q931

Any tips and/or experience would be appreciated.

1) Config extract:


voice service voip


h450 h450-2 timeout T4 10000

h450 h450-3 timeout T1 10000

h245 tunnel disable

h245 caps suppress nte

interface BRI2/0

description PSTN

no ip address

isdn switch-type basic-net3

isdn overlap-receiving T302 5000

isdn incoming-voice voice

isdn sending-complete

isdn outgoing display-ie


dial-peer voice 100 voip

destination-pattern 602

signaling forward none

voice-class h323 100

session target ipv4:

dtmf-relay h245-alphanumeric

codec g711alaw

2) debug isdn q931 output

VoIP-GW-ARGO#sh deb

The following ISDN debugs are enabled on all DSLs:

debug isdn error is ON.

debug isdn q931 is ON.


Dec 19 16:02:03.432: %ISDN-6-LAYER2UP: Layer 2 for Interface BR2/0, TEI 69 chanp

Dec 19 16:02:03.436: ISDN BR2/0 Q931: TX -> SETUP pd = 8 callref = 0x40

Bearer Capability i = 0x8090A3

Standard = CCITT

Transer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0x83

Display i = 'Gilberto Rodoni'

Called Party Number i = 0x81, '0794223415'

Plan:ISDN, Type:Unknown

Sending Complete

Dec 19 16:02:03.673: ISDN BR2/0 Q931: RX <- CALL_PROC pd = 8 callref = 0xC0

Channel ID i = 0x89

Notification Ind i = 0xE8

Dec 19 16:02:08.196: ISDN BR2/0 Q931: RX <- ALERTING pd = 8 callref = 0xC0

Progress Ind i = 0x8288 - In-band info or appropriate now available

Dec 19 16:02:10.676: ISDN BR2/0 Q931: RX <- CONNECT pd = 8 callref = 0xC0

Display i = 'FR. 0.10'

Date/Time i = 0x030C131102

Connected Number i = 0x00A3

Dec 19 16:02:10.680: ISDN BR2/0 Q931: TX -> CONNECT_ACK pd = 8 callref = 0x40

Dec 19 16:02:10.712: ISDN BR2/0 Q931: RX <- FACILITY pd = 8 callref = 0xC0

Facility i = 0x91A11B0202EDC50201213012A10D810346522EA20681010A82010182

- ETSI Supplementary Service, Invoke, AOC-D Currency

Dec 19 16:02:10.776: %ISDN-6-CONNECT: Interface BRI2/0:1 is now connected to un

Dec 19 16:02:10.776: ISDN BR2/0 Q931: TX -> DISCONNECT pd = 8 callref = 0x40

Cause i = 0x8090 - Normal call clearing

Dec 19 16:02:10.917: ISDN BR2/0 Q931: RX <- RELEASE pd = 8 callref = 0xC0

Facility i = 0x91A11A0202EDC60201233011300FA10D810346522EA20681010A8201

- ETSI Supplementary Service, Invoke, AOC-E Currency

Display i = 'FR. 0.10'

Dec 19 16:02:10.925: ISDN BR2/0 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x40


Re: Netmeeting problems when calling via PSTN

Take a look at this document on Outbound ISDN Calls Fail when Originated from NetMeeting or Similar Third Party H.323 Devices. Should be of help.

New Member

Re: Netmeeting problems when calling via PSTN



Bearer capability speech

on the voice-port of the outgoing ISDN-Line.

Under some circumstances the router doesn´t know that the netmeeting-call is voice and so it cannot connect to a voice-device outside.

I cannot better disclaim, try if it works.


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