ISDN outgoing calls continuous noisy (shhhhhhhhh) sound and line deactivate issues

[KENNEDY BIZUAYEHU TADEGE]

Hi All,

we've installed ISDN line on CME and incoming calls have no issues but all outgoing calls have continuous noisy (shhhhhhhhh) sound for inside callers but the called party (PSTN) clearly hears the callers voice. and in addition to that the ISDN line gets deactivated suddenly at some time. below is our configuration. please advise 

VOIP-R#sh run
Building configuration...

Current configuration : 7690 bytes
!
! Last configuration change at 20:19:24 uct Fri Jun 12 2020 by symbol
! NVRAM config last updated at 13:16:39 uct Wed Jun 3 2020 by symbol
! NVRAM config last updated at 13:16:39 uct Wed Jun 3 2020 by symbol
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname VOIP-R
!
boot-start-marker
boot-end-marker
!
!
card type e1 0 2
!
no aaa new-model
clock timezone uct 3 0
network-clock-participate wic 2
!
no ipv6 cef
ip source-route
ip cef
!
!
!
!
!
multilink bundle-name authenticated
!
!
!
!
isdn switch-type primary-net5
!
crypto pki token default removal timeout 0
!
crypto pki trustpoint TP-self-signed-3072723400
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-3072723400
revocation-check none
rsakeypair TP-self-signed-3072723400
!
!
crypto pki certificate chain TP-self-signed-3072723400
certificate self-signed 01
3082022B 30820194 A0030201 02020101 300D0609 2A864886 F70D0101 05050030
31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
69666963 6174652D 33303732 37323334 3030301E 170D3139 31303131 31303133
31315A17 0D323030 31303130 30303030 305A3031 312F302D 06035504 03132649
4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D33 30373237
32333430 3030819F 300D0609 2A864886 F70D0101 01050003 818D0030 81890281
8100E456 20ECE1EF 81AC1A27 74D7248E 59BBAEF1 B81653B8 6C3DFE0C EDB94434
8DAF3C7F 672FC346 E65E08F2 A6A726D1 4C7885E9 57610A00 A95AFB2F F8911DA4
66129BCF 755483F3 DB4B6642 42D4A71F 5DFF1A4F 4934B941 EABB3F5F 53661A62
1BF12507 521C3189 10E1FE60 D9FC7730 AF3EC617 73FF3E64 3707007C 1C17DF8D
FB510203 010001A3 53305130 0F060355 1D130101 FF040530 030101FF 301F0603
551D2304 18301680 14CAE988 5D3B9690 4B17CEBE 0A189B3B AA9940BA 52301D06
03551D0E 04160414 CAE9885D 3B96904B 17CEBE0A 189B3BAA 9940BA52 300D0609
2A864886 F70D0101 05050003 8181003A CC431B01 BACD51DA CD60BB6C C9DF42F4
E3191E44 6347CAA7 11355E75 E935DF0C 7B0D7DD0 D5F89BE0 FDA367E6 C38F211F
8A940CAC FAF0878F 72C126DE 96AD1154 D867380B ED242377 C0DA2594 E3F6CB8F
BC6B26F8 8E8DC4BD C89EB281 D057E72B 5025A2E4 A420D09B 1B893A66 64261212
6AB156A5 5F655E3F 0DAC0F37 5D22F2
quit
voice-card 0
dspfarm
dsp services dspfarm
!
!
!
voice service voip
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
redirect ip2ip
signaling forward unconditional
fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback none
sip
bind control source-interface GigabitEthernet0/0
bind media source-interface GigabitEthernet0/0
!
!
voice register global
mode cme
source-address 192.168.1.254 port 5060
max-dn 35
max-pool 35
authenticate register
!
!
!
!
license udi pid CISCO2901/K9 sn FCZ163020WV
hw-module pvdm 0/0
!
hw-module pvdm 0/1
!
!
!
username xxxxx privilege 15 password 0 yyyyyyy
!
redundancy
!
!
controller E1 0/2/0
framing NO-CRC4
pri-group timeslots 1-31
!
!
!
!
!
interface Loopback0
ip address 192.168.10.10 255.255.255.0
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
ip address 192.168.1.254 255.255.255.0
duplex auto
speed auto
!
interface GigabitEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/2/0:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn incoming-voice voice
no cdp enable
!
ip forward-protocol nd
!
ip http server
ip http authentication local
ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 192.168.1.1
!
!
!
!
control-plane
!
!
voice-port 0/0/0
connection plar opx 299
shutdown
caller-id enable
!
voice-port 0/0/1
connection plar opx 299
shutdown
caller-id enable
!
voice-port 0/0/2
connection plar opx 299
shutdown
caller-id enable
!
voice-port 0/0/3
connection plar opx 299
shutdown
caller-id enable
!
voice-port 0/2/0:15
connection plar 299
!
voice-port 0/1/0
connection plar opx 299
shutdown
caller-id enable
!
voice-port 0/1/1
connection plar opx 299
shutdown
caller-id enable
!
voice-port 0/1/2
connection plar opx 299
shutdown
caller-id enable
!
voice-port 0/1/3
connection plar opx 299
shutdown
caller-id enable
!
no ccm-manager fax protocol cisco
!
no mgcp package-capability res-package
no mgcp timer receive-rtcp
!
mgcp profile default
!
!
dial-peer voice 2 pots
description Outside Call
destination-pattern .T
incoming called-number .
port 0/0/1
forward-digits all
!
dial-peer voice 3 pots
description Outside Call
destination-pattern .T
incoming called-number .
port 0/0/2
forward-digits all
!
dial-peer voice 200 voip
description FreePBX-Trunk
numbering-type subscriber
destination-pattern 2..
session protocol sipv2
session target ipv4:192.168.1.242:5060
session transport udp
dtmf-relay rtp-nte
codec g711ulaw
!
dial-peer voice 1 pots
description Outside Call
destination-pattern .T
incoming called-number .
port 0/0/0
forward-digits all
!
dial-peer voice 4 pots
description Outside Call
destination-pattern .T
incoming called-number .
port 0/0/3
forward-digits all
!
dial-peer voice 5 pots
description Outside Call
destination-pattern .T
incoming called-number .
port 0/1/0
forward-digits all
!
dial-peer voice 6 pots
description Outside Call
destination-pattern .T
incoming called-number .
port 0/1/1
forward-digits all
!
dial-peer voice 7 pots
description Outside Call
destination-pattern .T
incoming called-number .
port 0/1/2
forward-digits all
!
dial-peer voice 8 pots
description Outside Call
destination-pattern .T
incoming called-number .
port 0/1/3
forward-digits all
!
dial-peer voice 100 pots
destination-pattern .T
incoming called-number .
clid network-number 6848
port 0/2/0:15
forward-digits all
!
dial-peer voice 300 voip
description FreePBX-Trunk
numbering-type unknown
destination-pattern 2..
session protocol sipv2
session target ipv4:192.168.1.242:5060
session transport udp
dtmf-relay rtp-nte
codec g711ulaw
!
!
gateway
timer receive-rtp 1200
!
sip-ua
credentials username symbolcme password 7 044B0A151C3648 realm bitrix24
credentials username cisco password 7 071F205F5D1E1D realm freepbx
no remote-party-id
retry invite 3
retry response 3
retry bye 3
retry cancel 3
timers trying 1000
registrar ipv4:192.168.1.242 expires 3600
sip-server ipv4:192.168.1.242
!
!
!
gatekeeper
shutdown
!
!
telephony-service
max-ephones 35
max-dn 35
ip source-address 192.168.1.254 port 2000
max-conferences 8 gain -6
transfer-system full-consult
!
!
ephone-dn 1 dual-line
number 102
label Naod Missale (102)
description Naod Missale
name Naod Missale
!
!
ephone-dn 2 dual-line
number 103
label Tewodros Kifle (103)
description Tewodros Kifle
name Tewodros Kifle
!
!
ephone-dn 3 dual-line
number 104
label Abebe Kegne (104)
description Abebe Kegne
name Abebe Kegne
!
!
ephone-dn 4 dual-line
number 105
label Yibeltal Adinew (105)
description Yibeltal Adinew
name Yibeltal Adinew
!
!
ephone-dn 10 dual-line
number 110
label Test One (110)
description Test One
name Test One
!
!
ephone-dn 11 dual-line
number 111
label Test Two (111)
description Test Two
name Test Two
!
!
ephone 10
mac-address 54EE.75B1.B139
type CIPC
button 1:10
!
!
!
ephone 11
mac-address C83D.D4AE.16B3
type CIPC
button 1:11
!
!
!
!
line con 0
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
privilege level 15
login local
transport input telnet ssh
!
scheduler allocate 20000 1000
end

[Ritesh Desai]

Hi,

I recollect similar issue in my deployment. I had longtime to connect calls on IPLC circuits (international PRI) so i added ”isdn sending complete” command to send setup message quickly to setup call.

For hissing sounds i found was due to electrostatic currents.
1). Check if you have proper earthing with Cisco Routers.
2). Check NW Rack earthing is proper and standard way.
3). I replaced the Router 3945 chassis.
4). At last resort, i shifted Router to another NW rack with points1,2 in place.

I hope it finds useful.

Thanks & regards,
Ritesh Desai
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