Re: CISCO VoiceGateway Outbound call take 5seconds between SETUP_ACK and ALERTING

aspire0128 · ‎03-17-2021

Dear all,

My site have many branches, there are use each VoiceGateway.

one of branch site recently change R2 to PRI and change some configuration.

outbound call was nothing special. it was fast connect to call.

but now when outbound call little slow and feel like pause take 5second.

I don't understand what happen it is..

this is result of "debug isdn q931"

======================================================================================

Mar 17 13:17:56: ISDN Se1/0:15 Q931: Applying typeplan for sw-type 0x12 is 0x0 0x0, Calling num 0315090608
Mar 17 13:17:56: ISDN Se1/0:15 Q931: Sending SETUP callref = 0x02BB callID = 0x804E switch = primary-net5 interface = User
Mar 17 13:17:56: ISDN Se1/0:15 Q921: User TX -> INFO sapi=0 tei=0, ns=30 nr=106
Mar 17 13:17:56: ISDN Se1/0:15 Q931: SETUP pd = 8 callref = 0x02BB
Bearer Capability i = 0x8090A3
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA9839F
Exclusive, Channel 31
Calling Party Number i = 0x0081, '0315090608'
Plan: Unknown, Type:Unknown
Called Party Number i = 0x80, '01030900020'
Plan:Unknown, Type:Unknown
Mar 17 13:17:56: ISDN Se1/0:15 Q921: User RX <- RR sapi=0 tei=0 nr=31
Mar 17 13:17:56: ISDN Se1/0:15 Q921: User RX <- INFO sapi=0 tei=0, ns=106 nr=31
Mar 17 13:17:56: ISDN Se1/0:15 Q931: SETUP_ACK pd = 8 callref = 0x82BB
Channel ID i = 0xA9839F
Exclusive, Channel 31
Mar 17 13:17:56: ISDN Se1/0:15 Q921: User TX -> RR sapi=0 tei=0 nr=107
Mar 17 13:17:59: ISDN Se1/0:15 Q921: User RX <- INFO sapi=0 tei=0, ns=107 nr=31
Mar 17 13:17:59: ISDN Se1/0:15 Q931: CALL_PROC pd = 8 callref = 0x82BB
Channel ID i = 0xA9839F
Exclusive, Channel 31
Mar 17 13:17:59: ISDN Se1/0:15 Q921: User TX -> RR sapi=0 tei=0 nr=108
Mar 17 13:18:01: ISDN Se1/0:15 Q921: User RX <- INFO sapi=0 tei=0, ns=108 nr=31
Mar 17 13:18:01: ISDN Se1/0:15 Q931: ALERTING pd = 8 callref = 0x82BB
Channel ID i = 0xA1839F
Preferred, Channel 31
Progress Ind i = 0x8181 - Call not end-to-end ISDN, may have in-band info
Mar 17 13:18:01: ISDN Se1/0:15 Q921: User TX -> RR sapi=0 tei=0 nr=109
Mar 17 13:18:04: ISDN Se1/0:15 Q921: User RX <- INFO sapi=0 tei=0, ns=109 nr=31
Mar 17 13:18:04: ISDN Se1/0:15 Q931: CONNECT pd = 8 callref = 0x82BB
Called Party Number i = 0xA1, '01030900020'
Plan:ISDN, Type:National
Mar 17 13:18:04: ISDN Se1/0:15 Q921: User TX -> RR sapi=0 tei=0 nr=110
Mar 17 13:18:04: %ISDN-6-CONNECT: Interface Serial1/0:30 is now connected to 01030900020 N/A

Mar 17 13:18:04: ISDN Se1/0:15 Q921: User TX -> INFO sapi=0 tei=0, ns=31 nr=110
Mar 17 13:18:04: ISDN Se1/0:15 Q931: CONNECT_ACK pd = 8 callref = 0x02BB
Mar 17 13:18:04: ISDN Se1/0:15 Q921: User RX <- RR sapi=0 tei=0 nr=32

Mar 17 13:18:10: ISDN Se1/0:15 Q921: User RX <- INFO sapi=0 tei=0, ns=110 nr=32
Mar 17 13:18:10: ISDN Se1/0:15 Q931: DISCONNECT pd = 8 callref = 0x82BB
Cause i = 0x8190 - Normal call clearing
Mar 17 13:18:10: ISDN Se1/0:15 Q921: User TX -> RR sapi=0 tei=0 nr=111
Mar 17 13:18:10: %ISDN-6-DISCONNECT: Interface Serial1/0:30 disconnected from 01030900020 , call lasted 5 seconds

======================================================================================

this site configuration is same with others.

======================================================================
card type e1 1 1
network-clock-participate slot 1
network-clock-select 1 E1 1/0
network-clock-select 2 E1 1/1
!
isdn switch-type primary-net5
!
voice-card 0
dspfarm
dsp services dspfarm
!
voice-card 1
dspfarm
dsp services dspfarm
!
!
voice call send-alert
voice rtp send-recv
!
voice service voip
allow-connections h323 to sip
no supplementary-service sip handle-replaces
fax protocol pass-through g711ulaw
h323
modem passthrough nse codec g711ulaw
!
voice class codec 1
codec preference 1 g711alaw
codec preference 2 g711ulaw
codec preference 3 g729r8
!
voice class h323 1
h225 timeout tcp establish 3
call preserve
!
!
voice translation-profile CID
translate calling 1
!
voice translation-profile To_PSTN
translate calling 2
!
!
controller E1 1/0
framing NO-CRC4
pri-group timeslots 1-31
!
controller E1 1/1
framing NO-CRC4
pri-group timeslots 1-31
!
ip ssh version 2
!
!
!
interface Loopback0
ip address 100.133.x.x 255.255.255.255
no ip redirects
no ip unreachables
no ip proxy-arp
h323-gateway voip interface
h323-gateway voip bind srcaddr 100.133.x.x
!
interface GigabitEthernet0/0
ip address 100.133.x.y 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
duplex auto
speed auto
!
interface Serial1/0:15
no ip address
encapsulation ppp
isdn switch-type primary-net5
isdn incoming-voice voice
!
interface Serial1/1:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn incoming-voice voice
no cdp enable
!
!
no ip http server
ip http access-class 23
ip http authentication local
no ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
!
logging facility local1
logging source-interface Loopback0
!
!
!
!
!
nls resp-timeout 1
cpd cr-id 1
!
control-plane
!
!
voice-port 1/0:15
disc_pi_off
cptone KR
bearer-cap Speech
!
voice-port 1/1:15
disc_pi_off
cptone KR
bearer-cap Speech
!
!
!
mgcp profile default
!
sccp local Loopback0
sccp ccm 100.133.x.x identifier 1 version 7.0
sccp
!
sccp ccm group 1
bind interface Loopback0
!
dspfarm profile 10 conference
codec g711ulaw
codec g711alaw
codec g729ar8
codec g729abr8
codec g729r8
codec g729br8
maximum sessions 5
associate application SCCP
!
dial-peer voice 100 pots
translation-profile incoming CID
incoming called-number 4...
direct-inward-dial
!
dial-peer voice 300 voip
destination-pattern 4...
session target ipv4:100.136.x.x
voice-class codec 1
voice-class h323 1
dtmf-relay h245-alphanumeric
no vad
!!
dial-peer voice 200 pots
translation-profile outgoing To_PSTN
destination-pattern 9T
progress_ind alert enable 8
progress_ind progress enable 8
progress_ind connect enable 8
port 1/0:15
!
dial-peer voice 201 pots
translation-profile outgoing To_PSTN
destination-pattern 9T
port 1/1:15
!
!
dial-peer hunt 2
!
!
gatekeeper
shutdown
!
!
telephony-service
srst mode auto-provision all
srst dn line-mode dual
max-ephones 165
max-dn 500 preference 10
ip source-address 100.133.x.x port 2000
no service directed-pickup
timeouts interdigit 4
time-zone 44
date-format yy-mm-dd
max-conferences 12 gain -6
call-forward pattern T
call-forward pattern .T
transfer-system full-consult
transfer-pattern T
transfer-pattern .T
secondary-dialtone 9

======================================================================

Scott Leport · ‎03-18-2021

Hello,

Is there any reason why one of the serial interfaces have encapsulation PPP setup and the other has HDLC? The config is commonly HDLC.
According to the debug, the call is using 1/0:15, which has the PPP configuration in place.
What happens if you set 1/0:15 with a higher preference? Do you experience the same issue if the call goes out of 1/1:15?

Scott Leport · ‎03-19-2021

Hi there,

Sorry, just looked at this one again.

A debug voip ccapi inout would confirm, but I suspect you may not be matching your inbound dial-peer on your outbound call.

Wondering if you would consider making the following change:

Dial-peer voice 100 pots

incoming called-number .

The following change would ensure that all calls on the inbound leg would match this pattern.