I'm having a problem with getting occassional busy signals on my IP PBX. I've narrowed the problem down and occassionally I get duplicate ports being consumed on a single call. With only 1 RTP session I can get up to 9 channels consumed on my PRI. I have verified the cable used is correct per the adtran manual and cisco manual for the VWIC-1MFT (crossover PRI pins 12 45 and tests ok on the cable certifier). Problem appears to be completely random and I have not been able to duplicate it. I have verifiedthe PBX has only 1 SIP/RTP session between the itself and the VoIP phone. It appears to be occurring on the Cisco 1751-V. For Privacy I have edited he calling party and destination numbers to correspond with the call. I'm wondering if someone a bit more experienced can help point me in the right direction of what to check next because Im at a loss.
Version:
(C1700-IPVOICEK9-M), Version 12.4(15)T10
Network is setup as follows.
PSTN > Channelized DS3 > Adtran 890 <-PRI-> Adtran 550 <-PRI-> Cisco 1751-V <-IP/Ethernet-> IP-PBX
>sh run | begin int
!
interface FastEthernet0/0
ip address 10.10.10.10 255.255.255.0
speed auto
h323-gateway voip interface
h323-gateway voip bind srcaddr 10.10.10.10
!
interface Serial0/0:23
no ip address
encapsulation hdlc
no logging event link-status
isdn switch-type primary-ni
isdn incoming-voice voice
isdn supp-service name calling
isdn negotiate-bchan
no isdn outgoing display-ie
no cdp enable
!
voice-port 0/0:23
no vad
no comfort-noise
!
dial-peer voice 7 pots
preference 1
destination-pattern .
direct-inward-dial
port 0/0:23
forward-digits 10
!
dial-peer voice 700 voip
preference 1
destination-pattern .
session protocol sipv2
session target ipv4:10.10.10.11:5065
session transport udp
dtmf-relay rtp-nte
codec g711ulaw
ip qos dscp cs5 media
no vad
!
--------------------------------------------------------------------------------------------------
****PROBLEM CALLS****
>sh voice call sum
PORT CODEC VAD VTSP STATE VPM STATE
============== ========= === ==================== ======================
0/0:23.1 - - -
0/0:23.2 - - -
0/0:23.3 - - -
0/0:23.4 - - -
0/0:23.5 - - -
0/0:23.6 - - -
0/0:23.7 - - -
0/0:23.8 - - -
0/0:23.9 - - -
0/0:23.10 - - -
0/0:23.11 - - -
0/0:23.12 - - -
0/0:23.13 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.14 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.15 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.16 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.17 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.18 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.19 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.20 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.21 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.22 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.23 g711ulaw n S_CONNECT S_TSP_CONNECT
-----------------------------------------------------------------------------------------------------
>sh voip rtp conn
VoIP RTP active connections :
No. CallId dstCallId LocalRTP RmtRTP LocalIP RemoteIP
1 27651 27652 18364 24070 10.10.10.10 10.10.10.11
2 27662 27661 17992 16806 10.10.10.10 10.10.10.11
Found 2 active RTP connections
>sh isdn active
--------------------------------------------------------------------------------
ISDN ACTIVE CALLS
--------------------------------------------------------------------------------
Call Calling Called Remote Seconds Seconds Seconds Charges
Type Number Number Name Used Left Idle Units/Currency
--------------------------------------------------------------------------------
Out 0000000001 XXXXXXXXXX 17 0 0 0
Out 0000000002 XXXXXXXXXX 15 0 0 0
In 0000000002 XXXXXXXXXX 15 0 0 0
Out 0000000002 XXXXXXXXXX 15 0 0 0
In 0000000002 XXXXXXXXXX 15 0 0 0
Out 0000000002 XXXXXXXXXX 15 0 0 0
In 0000000002 XXXXXXXXXX 15 0 0 0
Out 0000000002 XXXXXXXXXX 15 0 0 0
In 0000000002 XXXXXXXXXX 15 0 0 0
In 0000000002 XXXXXXXXXX 15 0 0 0
--------------------------------------------------------------------------------
****Normal Call****
>sh voice call sum
PORT CODEC VAD VTSP STATE VPM STATE
============== ========= === ==================== ======================
0/0:23.1 - - -
0/0:23.2 - - -
0/0:23.3 - - -
0/0:23.4 - - -
0/0:23.5 - - -
0/0:23.6 - - -
0/0:23.7 - - -
0/0:23.8 - - -
0/0:23.9 - - -
0/0:23.10 - - -
0/0:23.11 - - -
0/0:23.12 - - -
0/0:23.13 - - -
0/0:23.14 - - -
0/0:23.15 - - -
0/0:23.16 - - -
0/0:23.17 - - -
0/0:23.18 - - -
0/0:23.19 - - -
0/0:23.20 - - -
0/0:23.21 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.22 g711ulaw n S_CONNECT S_TSP_CONNECT
0/0:23.23 g711ulaw n S_CONNECT S_TSP_CONNECT
---------------------------------------------------------------------------------------------
>sh voip rtp conn
VoIP RTP active connections :
No. CallId dstCallId LocalRTP RmtRTP LocalIP RemoteIP
1 27651 27652 18364 24070 10.10.10.10 10.10.10.11
2 27676 27675 18780 22516 10.10.10.10 10.10.10.11
3 27678 27677 16398 32766 10.10.10.10 10.10.10.11
Found 3 active RTP connections
--------------------------------------------------------------------------------------------
>sh isdn active
--------------------------------------------------------------------------------
ISDN ACTIVE CALLS
--------------------------------------------------------------------------------
Call Calling Called Remote Seconds Seconds Seconds Charges
Type Number Number Name Used Left Idle Units/Currency
--------------------------------------------------------------------------------
Out 0000000001 XXXXXXXXXX 207 0 0 0
In 0000000002 XXXXXXXXXX 46 0 0 0
In 0000000003 XXXXXXXXXX 17 0 0 0
--------------------------------------------------------------------------------
