Подскажите пожалуйста, что может быть причиной плохого качества голоса (пропадание звука , треск) при соединении выделенной линией по FR? Вот конфиги:

exit
lonmx01#sh run
Building configuration...

Current configuration : 9712 bytes
!
! Last configuration change at 18:13:54 UTC Tue Feb 8 2005 by maxim
! NVRAM config last updated at 18:46:09 UTC Thu Feb 3 2005 by maxim
!
version 12.3
no service pad
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
!
hostname lonmx01
!
boot-start-marker
boot system flash
boot-end-marker
!
logging buffered 10240 debugging
logging console informational
enable secret 5 $1$F3e2$jTMCdIG.AUGHJa4uTmiTo.
!
username maxim password 7 062A003149173F1C0216
username zhilivi password 7 124853464B5E55
username aemelyan password 7 051C071B245E425949
memory-size iomem 15
network-clock-participate slot 1
network-clock-select 1 E1 1/0
voice-card 1
!
aaa new-model
!
!
aaa authentication login console local
aaa session-id common
ip subnet-zero
no ip source-route
!
!
ip domain name rencap.com
ip name-server 192.168.1.50
ip name-server 10.14.0.2
!
no ip bootp server
ip multicast-routing
ip cef
ip audit notify log
ip audit po max-events 100
no ftp-server write-enable
!
!
!
isdn voice-call-failure 0
!
!
!
voice service vofr
!
!
!
!
!
!
!
!
!
!
!
controller E1 1/0
mode ccs frame-forwarding
framing NO-CRC4
channel-group 15 timeslots 16
ds0-group 0 timeslots 15 type ext-sig
ds0-group 1 timeslots 1 type ext-sig
ds0-group 2 timeslots 2 type ext-sig
ds0-group 3 timeslots 3 type ext-sig
ds0-group 4 timeslots 4 type ext-sig
ds0-group 5 timeslots 5 type ext-sig
ds0-group 6 timeslots 6 type ext-sig
ds0-group 7 timeslots 7 type ext-sig
ds0-group 8 timeslots 8 type ext-sig
ds0-group 9 timeslots 9 type ext-sig
ds0-group 10 timeslots 10 type ext-sig
ds0-group 11 timeslots 11 type ext-sig
ds0-group 12 timeslots 12 type ext-sig
ds0-group 13 timeslots 13 type ext-sig
ds0-group 14 timeslots 14 type ext-sig
ds0-group 16 timeslots 17 type ext-sig
ds0-group 17 timeslots 18 type ext-sig
ds0-group 18 timeslots 19 type ext-sig
ds0-group 19 timeslots 20 type ext-sig
ds0-group 20 timeslots 21 type ext-sig
ds0-group 21 timeslots 22 type ext-sig
ds0-group 22 timeslots 23 type ext-sig
ds0-group 23 timeslots 24 type ext-sig
ds0-group 24 timeslots 25 type ext-sig
!
!
!
interface FastEthernet0/0
ip address 192.168.1.90 255.255.255.0
speed auto
half-duplex
!
interface Serial0/0
no ip address
encapsulation frame-relay
no ip mroute-cache
frame-relay traffic-shaping
frame-relay lmi-type cisco
frame-relay ip rtp header-compression
!
interface Serial0/0.1 point-to-point
bandwidth 1984000
ip address 192.168.110.2 255.255.255.0
ip bandwidth-percent eigrp 10 10
ip pim sparse-mode
frame-relay class Tandem
frame-relay interface-dlci 100  
  vofr data 4 call-control 5
!
interface FastEthernet0/1
description VLAN112, LON_MOS_LAN (VTP LONDON)
ip address 192.168.112.1 255.255.255.0
ip pim sparse-mode
duplex auto
speed auto
!
interface Serial0/1
no ip address
shutdown
!
interface Serial1/0:15
no ip address
no keepalive
ccs encap frf11
ccs connect Serial0/0 100 254
no cdp enable
!
router eigrp 10
passive-interface FastEthernet0/0
network 192.168.110.0
network 192.168.112.0
neighbor 192.168.110.1 Serial0/0.1
neighbor 192.168.112.4 FastEthernet0/1
neighbor 192.168.112.2 FastEthernet0/1
neighbor 192.168.112.3 FastEthernet0/1
no auto-summary
no eigrp log-neighbor-changes
!
no ip http server
no ip http secure-server
ip classless
!
ip pim bidir-enable
ip pim rp-address 10.14.0.3 override
ip pim send-rp-announce Serial0/0.1 scope 4
ip pim send-rp-discovery Serial0/0.1 scope 5
!
!
map-class frame-relay Tandem
frame-relay cir 1984000
frame-relay bc 19840
frame-relay be 0
frame-relay mincir 1856000
frame-relay fair-queue
frame-relay interface-queue priority high
frame-relay voice bandwidth 304000
frame-relay fragment 1500
frame-relay ip rtp priority 16384 16383 48
logging trap debugging
logging source-interface FastEthernet0/1
logging 10.14.0.252
logging 10.14.0.253
logging 10.14.0.254
access-list 20 deny   224.0.1.39
access-list 20 deny   224.0.1.40
access-list 20 permit 227.1.1.1
access-list 20 permit 224.0.0.0 15.255.255.255
access-list 30 deny   227.1.1.1
access-list 30 permit any
dialer-list 1 protocol ip permit
dialer-list 1 protocol ipx permit
!
!
snmp-server community 7oaks RW 30
snmp-server enable traps snmp authentication linkdown linkup coldstart
snmp-server enable traps tty
snmp-server enable traps isdn call-information
snmp-server enable traps isdn layer2
snmp-server enable traps hsrp
snmp-server enable traps config
snmp-server enable traps entity
snmp-server enable traps envmon
snmp-server enable traps bgp
snmp-server enable traps ipmulticast
snmp-server enable traps rsvp
snmp-server enable traps frame-relay
snmp-server enable traps frame-relay subif
snmp-server enable traps syslog
!
voice-port 1/0:0
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1000
!
voice-port 1/0:1
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1001
!
voice-port 1/0:2
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1002
!
voice-port 1/0:3
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1003
!
voice-port 1/0:4
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1004
!
voice-port 1/0:5
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1005
!
voice-port 1/0:6
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1006
!
voice-port 1/0:7
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1007
!
voice-port 1/0:8
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1008
!
voice-port 1/0:9
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1009
!
voice-port 1/0:10
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1010
!
voice-port 1/0:11
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1011
!
voice-port 1/0:12
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1012
!
voice-port 1/0:13
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1013
!
voice-port 1/0:14
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1014
!
voice-port 1/0:16
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1016
!
voice-port 1/0:17
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1017
!
voice-port 1/0:18
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1018
!
voice-port 1/0:19
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1019
!
voice-port 1/0:20
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1020
!
voice-port 1/0:21
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1021
!
voice-port 1/0:22
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1022
!
voice-port 1/0:23
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1023
!
voice-port 1/0:24
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 1024
!
!
!
!
dial-peer cor custom
!
!
!
dial-peer voice 2000 pots
destination-pattern 2000
port 1/0:0
!
dial-peer voice 2001 pots
destination-pattern 2001
port 1/0:1
!
dial-peer voice 2002 pots
destination-pattern 2002
port 1/0:2
!
dial-peer voice 2003 pots
destination-pattern 2003
port 1/0:3
!
dial-peer voice 2004 pots
destination-pattern 2004
port 1/0:4
!
dial-peer voice 2005 pots
destination-pattern 2005
port 1/0:5
!
dial-peer voice 2006 pots
destination-pattern 2006
port 1/0:6
!
dial-peer voice 2007 pots
destination-pattern 2007
port 1/0:7
!
dial-peer voice 2008 pots
destination-pattern 2008
port 1/0:8
!
dial-peer voice 2009 pots
destination-pattern 2009
port 1/0:9
!
dial-peer voice 2010 pots
destination-pattern 2010
port 1/0:10
!
dial-peer voice 2011 pots
destination-pattern 2011
port 1/0:11
!
dial-peer voice 2012 pots
destination-pattern 2012
port 1/0:12
!
dial-peer voice 2013 pots
destination-pattern 2013
port 1/0:13
!
dial-peer voice 2014 pots
destination-pattern 2014
port 1/0:14
!
dial-peer voice 2016 pots
destination-pattern 2016
port 1/0:16
!
dial-peer voice 2017 pots
destination-pattern 2017
port 1/0:17
!
dial-peer voice 2018 pots
destination-pattern 2018
port 1/0:18
!
dial-peer voice 2019 pots
destination-pattern 2019
port 1/0:19
!
dial-peer voice 2020 pots
destination-pattern 2020
port 1/0:20
!
dial-peer voice 2021 pots
destination-pattern 2021
port 1/0:21
!
dial-peer voice 2022 pots
destination-pattern 2022
port 1/0:22
!
dial-peer voice 2023 pots
destination-pattern 2023
port 1/0:23
!
dial-peer voice 2024 pots
destination-pattern 2024
port 1/0:24
!
dial-peer voice 1000 vofr
destination-pattern 1...
session target Serial0/0 100
!
!
banner login ^CCC
The use of this device is restricted to authorized users for business
purposes only. Any unauthorized access or attempted access is a  
criminal violation of the law. The use of this system constitutes
consent to security testing and monitoring.

Users must comply with internal data security guidelines.
^C
!
line con 0
session-timeout 2000
exec-timeout 2000 0
login authentication console
line aux 0
session-timeout 2000
exec-timeout 2000 0
login authentication console
modem InOut
transport input telnet
transport output telnet
escape-character BREAK
telnet transparent
stopbits 1
flowcontrol hardware
line vty 0 4
session-timeout 2000
exec-timeout 2000 0
login authentication console
transport input all
line vty 5 15
session-timeout 2000
exec-timeout 2000 0
login authentication console
transport input all
!
ntp clock-period 17180871
ntp server 10.14.0.4
!
!
end

lonmx01# exit

[Connection to lonmx01 closed by foreign host]
M4USB01#sh run
Building configuration...

Current configuration : 10161 bytes
!
! Last configuration change at 17:44:20 UTC Tue Feb 8 2005 by aemelyan
! NVRAM config last updated at 18:36:35 UTC Thu Feb 3 2005 by aemelyan
!
version 12.3
no service pad
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
!
hostname M4USB01
!
boot-start-marker
boot-end-marker
!
logging buffered 10240 debugging
no logging console
enable secret 5 $1$nM6S$ocl5FBBMzG/vN/xmJQp4G1
!
username maxim password 7 143B1D1B095D1C2E2329
username aemelyan password 7 00131212014907565F
username zhilivi password 7 091D185840504E
memory-size iomem 15
network-clock-participate slot 1
network-clock-select 1 E1 1/0
voice-card 1
!
aaa new-model
!
!
aaa authentication login console local
aaa session-id common
ip subnet-zero
no ip source-route
!
!
ip domain name rencap.com
ip name-server 10.14.0.2
!
no ip bootp server
ip multicast-routing
ip cef
ip audit notify log
ip audit po max-events 100
frame-relay switching
no ftp-server write-enable
!
!
!
isdn voice-call-failure 0
!
!
!
!
!
!
!
!
!
!
!
!
!
controller E1 1/0
mode ccs frame-forwarding
framing NO-CRC4
channel-group 15 timeslots 16
ds0-group 0 timeslots 15 type ext-sig
ds0-group 1 timeslots 1 type ext-sig
ds0-group 2 timeslots 2 type ext-sig
ds0-group 3 timeslots 3 type ext-sig
ds0-group 4 timeslots 4 type ext-sig
ds0-group 5 timeslots 5 type ext-sig
ds0-group 6 timeslots 6 type ext-sig
ds0-group 7 timeslots 7 type ext-sig
ds0-group 8 timeslots 8 type ext-sig
ds0-group 9 timeslots 9 type ext-sig
ds0-group 10 timeslots 10 type ext-sig
ds0-group 11 timeslots 11 type ext-sig
ds0-group 12 timeslots 12 type ext-sig
ds0-group 13 timeslots 13 type ext-sig
ds0-group 14 timeslots 14 type ext-sig
ds0-group 16 timeslots 17 type ext-sig
ds0-group 17 timeslots 18 type ext-sig
ds0-group 18 timeslots 19 type ext-sig
ds0-group 19 timeslots 20 type ext-sig
ds0-group 20 timeslots 21 type ext-sig
ds0-group 21 timeslots 22 type ext-sig
ds0-group 22 timeslots 23 type ext-sig
ds0-group 23 timeslots 24 type ext-sig
ds0-group 24 timeslots 25 type ext-sig
!
!
!
interface FastEthernet0/0
description VLAN111, MOS_LON_LAN (VTP USADBA)
ip address 192.168.111.1 255.255.255.0
ip directed-broadcast
ip pim sparse-mode
speed 100
full-duplex
hold-queue 32 in
hold-queue 100 out
!
interface Serial0/0
no ip address
ip accounting output-packets
encapsulation frame-relay
no ip mroute-cache
frame-relay traffic-shaping
frame-relay lmi-type cisco
frame-relay ip rtp header-compression
frame-relay intf-type dce
!
interface Serial0/0.1 point-to-point
bandwidth 1984000
ip address 192.168.110.1 255.255.255.0
ip accounting output-packets
ip bandwidth-percent eigrp 10 10
ip pim sparse-mode
ip multicast rate-limit out group-list 40 512
frame-relay class Tandem
frame-relay interface-dlci 100  
  vofr data 4 call-control 5
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
hold-queue 32 in
hold-queue 100 out
!
interface Serial0/1
no ip address
shutdown
!
interface Serial1/0:15
no ip address
no keepalive
ccs encap frf11
ccs connect Serial0/0 100 254
no cdp enable
!
router eigrp 10
network 192.168.110.0
network 192.168.111.0
neighbor 192.168.111.2 FastEthernet0/0
neighbor 192.168.111.3 FastEthernet0/0
neighbor 192.168.110.2 Serial0/0.1
no auto-summary
no eigrp log-neighbor-changes
!
no ip http server
no ip http secure-server
ip classless
ip route 192.168.30.0 255.255.255.0 192.168.100.6
ip route 192.168.31.0 255.255.255.0 192.168.100.6
!
ip pim rp-address 10.14.0.3 override
ip pim send-rp-discovery FastEthernet0/0 scope 2
!
!
map-class frame-relay Tandem
frame-relay cir 1984000
frame-relay bc 19840
frame-relay be 0
frame-relay mincir 1856000
frame-relay fair-queue
frame-relay interface-queue priority high
frame-relay voice bandwidth 304000
frame-relay fragment 1500
frame-relay ip rtp priority 16384 16383 48
logging trap debugging
logging source-interface FastEthernet0/0
logging 10.14.0.252
logging 10.14.0.253
logging 10.14.0.254
access-list 20 deny   227.1.1.1
access-list 20 deny   227.1.1.10
access-list 20 permit any
access-list 40 permit 227.1.1.1
access-list 40 permit 227.1.1.10
access-list 40 deny   any
access-list 50 permit 227.1.10.20
access-list 50 deny   any
!
!
snmp-server community 7oaks RW 30
snmp-server enable traps snmp authentication linkdown linkup coldstart
snmp-server enable traps tty
snmp-server enable traps isdn call-information
snmp-server enable traps isdn layer2
snmp-server enable traps hsrp
snmp-server enable traps config
snmp-server enable traps entity
snmp-server enable traps envmon
snmp-server enable traps bgp
snmp-server enable traps ipmulticast
snmp-server enable traps rsvp
snmp-server enable traps frame-relay
snmp-server enable traps frame-relay subif
snmp-server enable traps syslog
snmp-server enable traps rtr
snmp-server enable traps dlsw
snmp-server enable traps dial
snmp-server enable traps voice poor-qov
snmp-server host 10.14.0.254 7oaks
!
voice-port 1/0:0
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2000 answer-mode
!
voice-port 1/0:1
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2001 answer-mode
!
voice-port 1/0:2
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2002 answer-mode
!
voice-port 1/0:3
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2003 answer-mode
!
voice-port 1/0:4
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2004 answer-mode
!
voice-port 1/0:5
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2005 answer-mode
!
voice-port 1/0:6
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2006 answer-mode
!
voice-port 1/0:7
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2007 answer-mode
!
voice-port 1/0:8
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2008 answer-mode
!
voice-port 1/0:9
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2009 answer-mode
!
voice-port 1/0:10
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2010 answer-mode
!
voice-port 1/0:11
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2011 answer-mode
!
voice-port 1/0:12
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2012 answer-mode
!
voice-port 1/0:13
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2013 answer-mode
!
voice-port 1/0:14
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2014 answer-mode
!
voice-port 1/0:16
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2016 answer-mode
!
voice-port 1/0:17
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2017 answer-mode
!
voice-port 1/0:18
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2018 answer-mode
!
voice-port 1/0:19
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2019 answer-mode
!
voice-port 1/0:20
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2020 answer-mode
!
voice-port 1/0:21
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2021 answer-mode
!
voice-port 1/0:22
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2022 answer-mode
!
voice-port 1/0:23
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2023 answer-mode
!
voice-port 1/0:24
timeouts call-disconnect 3
timeouts wait-release 3
connection trunk 2024 answer-mode
!
!
!
!
dial-peer cor custom
!
!
!
dial-peer voice 1000 pots
destination-pattern 1000
port 1/0:0
!
dial-peer voice 1001 pots
destination-pattern 1001
port 1/0:1
!
dial-peer voice 1002 pots
destination-pattern 1002
port 1/0:2
!
dial-peer voice 1003 pots
destination-pattern 1003
port 1/0:3
!
dial-peer voice 1004 pots
destination-pattern 1004
port 1/0:4
!
dial-peer voice 1005 pots
destination-pattern 1005
port 1/0:5
!
dial-peer voice 1006 pots
destination-pattern 1006
port 1/0:6
!
dial-peer voice 1007 pots
destination-pattern 1007
port 1/0:7
!
dial-peer voice 1008 pots
destination-pattern 1008
port 1/0:8
!
dial-peer voice 1009 pots
destination-pattern 1009
port 1/0:9
!
dial-peer voice 1010 pots
destination-pattern 1010
port 1/0:10
!
dial-peer voice 1011 pots
destination-pattern 1011
port 1/0:11
!
dial-peer voice 1012 pots
destination-pattern 1012
port 1/0:12
!
dial-peer voice 1013 pots
destination-pattern 1013
port 1/0:13
!
dial-peer voice 1014 pots
destination-pattern 1014
port 1/0:14
!
dial-peer voice 1016 pots
destination-pattern 1016
port 1/0:16
!
dial-peer voice 1017 pots
destination-pattern 1017
port 1/0:17
!
dial-peer voice 1018 pots
destination-pattern 1018
port 1/0:18
!
dial-peer voice 1019 pots
destination-pattern 1019
port 1/0:19
!
dial-peer voice 1020 pots
destination-pattern 1020
port 1/0:20
!
dial-peer voice 1021 pots
destination-pattern 1021
port 1/0:21
!
dial-peer voice 1022 pots
destination-pattern 1022
port 1/0:22
!
dial-peer voice 1023 pots
destination-pattern 1023
port 1/0:23
!
dial-peer voice 1024 pots
destination-pattern 1024
port 1/0:24
!
dial-peer voice 2000 vofr
destination-pattern 2...
session target Serial0/0 100
!
!
banner login ^CCC
The use of this device is restricted to authorized users for business
purposes only. Any unauthorized access or attempted access is a  
criminal violation of the law. The use of this system constitutes
consent to security testing and monitoring.

Users must comply with internal data security guidelines.
^C
!
line con 0
session-timeout 2000
exec-timeout 2000 0
login authentication console
line aux 0
login authentication console
transport input telnet
transport output telnet
escape-character BREAK
telnet transparent
stopbits 1
flowcontrol hardware
line vty 0 4
exec-timeout 60 0
login authentication console
transport input all
line vty 5 15
exec-timeout 60 0
login authentication console
transport input all
!
ntp clock-period 17179559
ntp server 10.14.0.4
!
!
end

M4USB01#