topic Re: Hi Michael, in IP Telephony and Phones

While in SRST (SIP Phones) it takes 12 seconds for a transfer to complete

MICHAEL CICCONE — Sun, 17 Mar 2019 13:51:25 GMT

Hello all, looking for some help.

When I'm in SRST Mode (all SIP Phones) it takes 12 seconds for the phone I want to transfer to to start ringing. I press Transfer I get dial tone right away, I dial my extension then I have to wait 12 seconds before it will connect.

Any ideas as to why this takes so long?

Here is my SRST config:

voice register global
mode esrst
system message FALLBACK NET DOWN
max-dn 100
max-pool 100
!
voice register dn 1
number 8421190
shared-line
!
voice register pool 1
id network 0.0.0.0 mask 0.0.0.0
session-transport tcp
no digit collect kpml
dtmf-relay rtp-nte
voice-class codec 1
!
voice register pool 2
id mac 0041.D293.EAA6
number 1 dn 1
no digit collect kpml
!
voice register pool 3
id mac 00DA.5527.79FD
number 1 dn 1
no digit collect kpml
!
voice register pool 4
id mac 00DA.5527.28A7
number 1 dn 1
no digit collect kpml
!

call-manager-fallback
secondary-dialtone 9
max-conferences 4 gain -6
transfer-system full-consult
max-ephones 75
moh enable-g711 "bootflash:SampleAudioSource.ulaw.wav"

sip-ua
retry invite 2
retry bye 1
timers expires 60000
timers connect 1000
timers buffer-invite 800
registrar ipv4:10.7.53.1 expires 600
reason-header override

By any chance do you have any

Jaime Valencia — Tue, 10 May 2016 22:10:59 GMT

By any chance do you have any overlap in your dial plan?

Hi Michael,

Jonathan Unger — Wed, 11 May 2016 00:17:07 GMT

Hi Michael,

Under your voice register pools the command "no digit collect kpml" is most likely causing your issue. In order to have SIP phones send their digits to the SRST gateway one by one without waiting the inter-digit timeout delay use the following command under each voice register pool.

"digit collect kpml"

Then try re-registering your phones to SRST and see if the issue is resolved.

Let us know if this helps!

Please rate helpful posts!

Re: Hi Michael,

alig.norbert — Thu, 19 Dec 2019 14:49:53 GMT

Hi,

I know it's a quite old threat.

Got the same issue with a CME 12.0 and SIP (7841, 8821). With digit collect kpml (default settings) the SIP-phones are not able to transfer calls anymore. There was no changes done on the CME.

Changing the pool to "no digit collect kpml", transfer is working but with10sek delay until dialing.

Altering the interdigit timeout without success.

Any ideas?

Thanks,

Norbert

Re: Hi Michael,

mebarnett — Fri, 24 Jan 2020 00:30:46 GMT

I have this problem too ... have you gotten any feedback?