UC520 with POTS. Is the conversation full duplex?

Unanswered Question
May 2nd, 2012

We have a UC520 connected to a group of 7945 phones in the office, and Verizon POTS on the outside.  If you're having a conversation with someone who happens to be an outside caller, is the conversation full duplex - meaning can both sides talk at the same time, and both sides hear the opposing side?  Or is the conversation simplex switched so that only one person can talk at a time?

Thanks

Roscoe

I have this problem too.
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shustakc01 Thu, 05/03/2012 - 06:19

What might cause drop outs when the in house person speaks, and his voice cuts off the outside person's coming in?

We had a problem with nasty echo and static, so we "lowered" output attenuation and input gain on the voice ports connected to Verizon.  This fixed the echo (at least so far), but it also seems to have caused a situation where the inhouse person's voice can cut off the outside person's coming in voice.

Thanks

Alexander Maroukian Thu, 05/03/2012 - 06:32

If you connect normal analog phone on the wire do you experience the same problems?

If not please share the FXO port settings and ephone settings on one of the 7945 phone.

Best regards,

Alex

shustakc01 Thu, 05/03/2012 - 06:56

Barev!!

Normal analog phone shows no noise and no echo.  Here are the configs on the voice ports and the Ephones.

voice-port 0/1/0

trunk-group ALL_FXO 64

supervisory disconnect dualtone mid-call

input gain -3

timeouts call-disconnect 3

timeouts wait-release 3

connection plar opx 201

description Configured by CCA 4 FXO-0/1/0-OP

caller-id enable

!

voice-port 0/1/1

trunk-group ALL_FXO 64

supervisory disconnect dualtone mid-call

input gain -3

timeouts call-disconnect 3

timeouts wait-release 3

connection plar opx 201

impedance 600c

description Configured by CCA 4 FXO-0/1/1-OP

caller-id enable

!

voice-port 0/1/2

input gain -3

connection plar 304

impedance complex5

!

voice-port 0/1/3

output attenuation -6

shutdown

!

_________________________________________

ephone-dn  1  dual-line

number 201 no-reg primary

pickup-group 1

label EMERGENCY

description Recept1

name Tina

call-forward busy 202

call-forward noan 298 timeout 20

corlist incoming voice

huntstop channel

night-service bell

!

!

ephone-dn  2  dual-line

number 202 no-reg primary

pickup-group 1

label 202   Julie

description Recept2

name Julie

call-forward busy 298

call-forward noan 298 timeout 20

corlist incoming voice

!

!

ephone-dn  3  dual-line

number 203 no-reg primary

pickup-group 1

label 203   Donna

description Busoffice

name Donna Desantis

call-forward busy 299

call-forward noan 299 timeout 30

corlist incoming voice

!

!

ephone-dn  4  dual-line

number 204 no-reg primary

label 204   Nick Up

description Nick Desantis

name Nick Desantis

call-forward busy 298

call-forward noan 298 timeout 30

corlist incoming voice

!

!

ephone-dn  5  dual-line

number 205 no-reg primary

label 205   Consult

description Conference1

name Conference1

call-forward busy 298

call-forward noan 298 timeout 30

corlist incoming voice

!

!

ephone-dn  6  dual-line

number 206 no-reg primary

label 206   Break

description Break Room

name Break Room

call-forward busy 298

call-forward noan 298 timeout 30

corlist incoming voice

!

!

ephone-dn  7  dual-line

number 207 no-reg primary

label 207   Lab

description Laboratory1

name Laboratory1

call-forward busy 298

call-forward noan 298 timeout 30

corlist incoming voice

!

!

ephone-dn  8  dual-line

number 208 no-reg primary

label 208   Nick Desantis

description NickPer Desantis

name NickPer Desantis

call-forward busy 298

call-forward noan 298 timeout 30

corlist incoming voice

!

!

!

!

ephone  1

device-security-mode none

video

mac-address 0024.C443.9D84

ephone-template 1

username "recept01" password 21187

fastdial 1 xxxxxxx (redacted)

type 7965 addon 1 7916-24 2 7916-24

button  1:1 2m21 3m22 4m23

button  5m24 7m3 8m4 9m5

button  10m6 11m7 12m8

night-service bell

!

!

!

ephone  2

device-security-mode none

video

mac-address 0025.84A1.620B

ephone-template 1

username "Recept02" password 12345

type 7945

button  1:2

!

!

!

ephone  3

device-security-mode none

video

mac-address 0025.84A3.2A48

ephone-template 1

username "Busoffice"

type 7945

button  1:3

!

!

!

ephone  4

device-security-mode none

video

mac-address 0025.84A2.686E

ephone-template 16

username "NickJr" password 12345

type 7945

button  1:4

!

!

!

ephone  5

device-security-mode none

video

mac-address 0025.84A3.2B8B

ephone-template 16

username "Conference1" password 12345

type 7945

button  1:5

!

!

!

ephone  6

device-security-mode none

video

mac-address 0025.84A2.6211

ephone-template 16

username "Break" password 12345

type 7945

button  1:6

!

!

!

ephone  7

device-security-mode none

video

mac-address 0025.84A3.2A2B

ephone-template 16

username "Lab1" password 12345

type 7945

button  1:7

!

!

!

ephone  8

device-security-mode none

video

mac-address 0025.84A3.2A2C

ephone-template 1

username "NickPer" password 12345

type 7945

button  1:8

______________________________________

UC520Desantis01#show voice port 0/1/0

Foreign Exchange Office 0/1/0 Slot is 0, Sub-unit is 1, Port is 0

Type of VoicePort is FXO

Operation State is UP

Administrative State is UP

The Last Interface Down Failure Cause is Administrative Shutdown

Description is Configured by CCA 4 FXO-0/1/0-OP

Noise Regeneration is enabled

Non Linear Processing is enabled

Non Linear Mute is disabled

Non Linear Threshold is -21 dB

Music On Hold Threshold is Set to -38 dBm

In Gain is Set to -3 dB

Out Attenuation is Set to 3 dB

Echo Cancellation is enabled

Echo Cancellation NLP mute is disabled

Echo Cancellation NLP threshold is -21 dB

Echo Cancel Coverage is set to 128 ms

Echo Cancel worst case ERL is set to 6 dB

Playout-delay Mode is set to adaptive

Playout-delay Nominal is set to 60 ms

Playout-delay Maximum is set to 1000 ms

Playout-delay Minimum mode is set to default, value 40 ms

Playout-delay Fax is set to 300 ms

Connection Mode is plar opx

Connection Number is 201

Initial Time Out is set to 15 s

Interdigit Time Out is set to 10 s

Call Disconnect Time Out is set to 3 s

Power Denial Disconnect Time Out is set to 1000 ms

Ringing Time Out is set to 180 s

Wait Release Time Out is set to 3 s

Companding Type is u-law

Region Tone is set for US

Analog Info Follows:

Currently processing Voice

Maintenance Mode Set to None (not in mtc mode)

Number of signaling protocol errors are 0

Impedance is set to 600r Ohm

Station name None, Station number None

Caller ID Info Follows:

Standard BELLCORE

Caller ID is received after 1 ring(s)

Translation profile (Incoming):

Translation profile (Outgoing):

lpcor (Incoming):

lpcor (Outgoing):

Voice card specific Info Follows:

Signal Type is loopStart

Battery-Reversal is enabled

Number Of Rings is set to 1

Supervisory Disconnect is dualtone mid-call

Answer Supervision is inactive

Hook Status is Off Hook

Ring Detect Status is inactive

Ring Ground Status is inactive

Tip Ground Status is inactive

Dial Out Type is dtmf

Digit Duration Timing is set to 100 ms

InterDigit Duration Timing is set to 100 ms

Pulse Rate Timing is set to 10 pulses/second

InterDigit Pulse Duration Timing is set to 750 ms

Percent Break of Pulse is 60 percent

GuardOut timer is 2000 ms

Minimum ring duration timer is 125 ms

Hookflash-in Timing is set to 600 ms

Hookflash-out Timing is set to 400 ms

Supervisory Disconnect Timing (loopStart only) is set to 350 ms

OPX Ring Wait Timing is set to 6000 ms

Secondary dialtone is disabled

Alexander Maroukian Thu, 05/03/2012 - 08:02

Please check the dialpeers you are using and make sure you have "no vad" under their configuration. If you cannot see "no vad" please add it and test.

Best regards,

Alex

shustakc01 Fri, 05/04/2012 - 03:05

There are a slew of dial peers, most of whom have nothing to do with those outside lines.  Do I need to set this on all dial peers, or just the ones that seem to be associated with outgoing lines?

Thanks

Paolo Bevilacqua Fri, 05/04/2012 - 04:29

Alexander Maroukian wrote:

Please check the dialpeers you are using and make sure you have "no vad" under their configuration. If you cannot see "no vad" please add it and test.

Alex, VAD option only applies to voip dial-peer, not to pots ones.

OP problem must lie elsewhere. Possibly, non-optimal FXO port impendence setting.

Paolo Bevilacqua Sat, 05/05/2012 - 03:53

Please state what exact IOS are you running ?

It is not normal of having to drop the default gain and values. So more investigation is needed to find what really is happening.

shustakc01 Sun, 05/06/2012 - 09:41

We tried connecting analog phones to the Verizon FIOS lines, and found no noise or echo.  Tried replacing the wires that connected the UC520 with the FIOS box.  No change seen.

Ran impedance test on all lines, and set impedance accordingly.  No change seen.

IOS version is

show ver

Cisco IOS Software, UC500 Software (UC500-ADVIPSERVICESK9-M), Version 15.1(2)T4, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2011 by Cisco Systems, Inc.

Compiled Tue 12-Jul-11 22:01 by prod_rel_team

ROM: System Bootstrap, Version 12.4(11r)XW, RELEASE SOFTWARE (fc1)

UC520DiNinno01 uptime is 1 week, 6 days, 22 hours, 43 minutes

System returned to ROM by reload at 10:55:39 PST Sun Apr 22 2012

System restarted at 13:54:02 EDT Sun Apr 22 2012

System image file is "flash:uc500-advipservicesk9-mz.151-2.T4"

Last reload type: Normal Reload

Last reload reason: Reload Command

Cisco UC520-8U-4FXO-K9 (MPC8358) processor (revision 0x202) with 235520K/26624K bytes of memory.

Processor board ID FHK113310F6

MPC8358 CPU Rev: Part Number 0x804A, Revision ID 0x20

14 User Licenses

10 FastEthernet interfaces

2 terminal lines

1 Virtual Private Network (VPN) Module

4 Voice FXO interfaces

4 Voice FXS interfaces

1 Voice MoH interface

1 cisco service engine(s)

128K bytes of non-volatile configuration memory.

500472K bytes of ATA CompactFlash (Read/Write)

-------------------------------------------------

Device#   PID                   SN

-------------------------------------------------

*0        UC520-8U-4FXO-K9      F******

Configuration register is 0x2102

shustakc01 Sun, 05/06/2012 - 09:54

I'll give that a shot on Monday.  How do you set a default config on the fxo voice ports?

Alexander Maroukian Sun, 05/06/2012 - 10:17

You can set the default settings on every setting of the port you can see in the running config e.g. "input gain -3" - the issue "default input gain" under voice-port config and will be set with its default value. I can paste tomorrow default configuration.

While you make changes in the voice-port settings after you finish with the changes every time issue shut  - no shut on the port.

Best regards,

Alex

Alexander Maroukian Fri, 05/04/2012 - 09:28

Hi Paolo,

Absolutely right. Thank you for pointing this. I mixed with another post about sip:) my apologies Roscoe. Please try on one FXO with default configuration on one of the ports.

Please check the following link on how to check the implendance :

http://www.cisco.com/en/US/tech/tk652/tk701/technologies_tech_note09186a0080477a06.shtml

You can try THL Tone Sweep Method.

Please let me know if you fix it this way.

HTH,

Alex

Alexander Maroukian Fri, 05/04/2012 - 12:21

Hi Roscoe,

Paolo did make me think over my mistaken post and actually this gives me idea to make  another test. Please enter "no vad" under voice-port of one of the fxo ports e.g. voice-port 0/1/0. Please tell me if this fix the issue. You can try this on default port configuration also.

Best regards,

Alex

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