IPICS. VTG delay

Unanswered Question
Jul 15th, 2010

Hi all,

I writing this post because I'm doing an IPICS 2.01instalation right now. I put 4 channels, one with a nextel and 3 with motorola radio bases.

I have great comunication between the PMC and IP phones to all the channels, but when I enable a VTG on all the 3 motorolas I get a delay in the comunication, like 3 seconds. I'm not sure why this is happening, do anyone know how can I reduse this delay? do I need to change anything in the config?

I have attached my RMS configuration. I thank you all in advance for all your time and help.

Ramón

I have this problem too.
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engineerangelo Wed, 06/29/2011 - 01:50

Hi,

I'm also having the same problem with my radios. I have 2 brands of radios, a Motorola and a Kenwood. If I use the Motorola, It would take like 1.5 seconds for the LED light of the Kenwood E&M port to light up. It means I have to wait for 1.5 secs before my voice can be heard on the other side. And if I use the Kenwood, I need to speak loud and in a continuous manner before it can be heard on the other side. I have the same config on both voice ports. If I exchange the connection, it's still the same.

voice-port 0/0/0
voice-class permanent 1
auto-cut-through
operation 4-wire
type 3
signal lmr
lmr e-lead voice
lmr duplex half
lmr led-on
input gain auto-control
output attenuation auto-control
no comfort-noise
timeouts call-disconnect 3
connection trunk 1001

voice-port 0/1/0
voice-class permanent 1
auto-cut-through
operation 4-wire
type 3
signal lmr
lmr e-lead voice
lmr duplex half
lmr led-on
input gain auto-control
output attenuation auto-control
no comfort-noise
timeouts call-disconnect 3
connection trunk 1002

I've also tried on changing the parameters. But it seems the same.

Thanks in advance.

John Gillich Wed, 06/29/2011 - 06:20

Try this config for a Motorola XLT Radio.

The XTS are portables, all models 2500, 3000, 5000 etc. should all behave the same.

The XTL is the mobile.

Motorola XTL series portables.  It should also work with XTS series.  Are you also using a REM3601 & REM4475 cables from http://www.networkedradio.com ?

You will have to adjust input gain & output attenuation for best audio once its working.

voice-port

voice-class permanent 1

auto-cut-through

operation 4-wire

type 3

signal lmr

bootup e-lead off

lmr e-lead voice

lmr m-lead inactive

lmr duplex half

lmr led-on

input gain 16

output attenuation 17

no echo-cancel enable

no comfort-noise

timeouts call-disconnect 3

timeouts wait-release 3

timing hookflash-in 10

timing hangover 40

timing delay-voice tdm 250

connection trunk 101

description VAD Controlled Radio Example

threshold noise -40

dial-peer voice 101 voip

destination-pattern 101

rtp payload-type lmr-tone 107

rtp payload-type nte-tone 108

session protocol multicast

session target ipv4:239.192.0.1:21000

dtmf-relay rtp-nte

codec g711ulaw

ip qos dscp cs5 media

vad aggressive

John Gillich Wed, 06/29/2011 - 06:24

Below is another example.

The XTS5000 operates in VOX/VAD mode as it does not have a COR lead.  Most of the time there is no need to do programming to the handset.  Simply attached the XTS5000 cable from www.networkedradio.com (REM3601 + REM4475) to the radio, use an in-line 20dB attenuator (REM-621), and then attach to the router’s E&M port.  

This configuration was used for both conventional and trunked systems.  It seemed to work well as a middle of the road configuration.  The areas of the configuration you will need to consider for these various types of systems will generally be timing delay-voice tdm and timing hangover.

You will also want to be careful to consider if these resource will need to be cross-patched with other resources.  The configuration I sent was designed for this capability in mind.  However, this configuration prevents status tones such as binks and bonks from being heard from the IPICS user as the ports are set to half-duplex.  A longer discussion will ensue if you need status tones to be heard.

LMR Router Example config:

!
voice class permanent 1
  signal timing oos restart 50000
  signal timing oos timeout disabled
  signal keepalive disabled
  signal sequence oos no-action
!
interface Vif1
  ip address XXXXX 255.255.255.252
  ip pim sparse-mode
!
!
voice-port XXX
  voice-class permanent 1
  auto-cut-through
  operation 4-wire
  type 3
  signal lmr
  bootup e-lead off
  lmr e-lead voice
  lmr led-on
  output attenuation 9
  no echo-cancel enable
  no comfort-noise
  timeouts call-disconnect 3
  timeouts wait-release 3
  timing hangover 100
  connection trunk 79990001
  description *********** PD TACTICAL #1
  music-threshold -15
  threshold noise -40
!
voice-port XXX
  voice-class permanent 1
  auto-cut-through
  operation 4-wire
  type 3
  signal lmr
  bootup e-lead off
  lmr e-lead voice
  lmr led-on
  output attenuation 9
  no echo-cancel enable
  no comfort-noise
  timeouts call-disconnect 3
  timeouts wait-release 3
  timing hangover 100
  connection trunk 79990002
  description *********** PD TACTICAL #2
  music-threshold -15
  threshold noise -40
!
dial-peer voice XXXXXX voip
  destination-pattern 79990001
  voice-class permanent 1
  session protocol multicast
  session target ipv4:XXXXXX:21000
  codec g711ulaw bytes 80
  vad aggressive
!
dial-peer voice XXXXXX voip
  destination-pattern 79990002
  voice-class permanent 1
  session protocol multicast
  session target ipv4:XXXXXX:21000
  codec g711ulaw bytes 80
  vad aggressive
!
end

engineerangelo Wed, 06/29/2011 - 19:07

Hi John,

I'm using Motorola GP328 and Kenwood TK2107. I tried the your first example on the Motorola. If I speak on the Motorola, it takes about 1.5 to 2 secs before my voice is heard on the Kenwood radio. 

John Gillich Thu, 06/30/2011 - 08:53

Try decreasing the delay timing delay-voice tdm 250 to a lower value on the radio voice ports. Make sure you do a shut no shut on the port after making the change.

engineerangelo Sun, 07/03/2011 - 18:05

Hi John,

I've already removed the timing delay-voice tdm command. By default, the delay is 0ms right? How about your setup, aren't you experiencing delays?

Regards

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