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<TITLE>Voice clipping on Cisco PRI</TITLE>
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<FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>Hi,<BR>
<BR>
I have a customer with a PBX connected to a 2801. He says that when we both talk (I am calling in from PSTN) he hears my voice clipping, yet I hear his fine.<BR>
<BR>
I was wondering if someone has seen this before.<BR>
<BR>
Here are some configlets and version:<BR>
<BR>
<snip><BR>
isdn switch-type primary-ni<BR>
!<BR>
voice-card 0<BR>
!<BR>
!<BR>
!<BR>
voice service voip <BR>
fax protocol pass-through g711ulaw<BR>
modem passthrough nse codec g711ulaw<BR>
!<BR>
controller T1 0/3/0<BR>
framing esf<BR>
clock source internal<BR>
linecode b8zs<BR>
pri-group timeslots 1-8,24<BR>
!<BR>
class-map match-all voip<BR>
match access-group 105<BR>
!<BR>
!<BR>
policy-map llq<BR>
class voip<BR>
priority percent 100<BR>
class class-default<BR>
fair-queue<BR>
!<BR>
<snip><BR>
interface Serial0/1/0:0.16 point-to-point<BR>
ip address 10.20.121.1 255.255.255.252<BR>
no cdp enable<BR>
frame-relay interface-dlci 16 IETF protocol ip 10.20.121.2<BR>
class T1-throttledown<BR>
!<BR>
interface Serial0/3/0:23<BR>
no ip address<BR>
isdn switch-type primary-ni<BR>
isdn protocol-emulate network<BR>
isdn incoming-voice voice<BR>
no cdp enable<BR>
!<BR>
<snip><BR>
map-class frame-relay T1-throttledown<BR>
frame-relay traffic-rate 1544000 1544000<BR>
service-policy output llq<BR>
!<BR>
access-list 105 permit ip any any precedence critical<BR>
access-list 105 permit ip any any dscp ef<BR>
!<BR>
voice-port 0/3/0:23<BR>
!<BR>
dial-peer voice 1000 voip<BR>
application session<BR>
destination-pattern .T<BR>
session protocol sipv2<BR>
session target ipv4:10.50.0.40<BR>
codec g711ulaw<BR>
ip qos dscp ef signaling<BR>
no vad<BR>
!<BR>
dial-peer voice 103 pots<BR>
application session<BR>
destination-pattern <snip>75..<BR>
direct-inward-dial<BR>
port 0/3/0:23<BR>
prefix 75<BR>
!<BR>
<BR>
accurate-pri#sh ver<BR>
Cisco IOS Software, 2801 Software (C2801-IPVOICE-M), Version 12.3(11)T5, RELEASE SOFTWARE (fc1)<BR>
Technical Support: <a href="http://www.cisco.com/techsupport">http://www.cisco.com/techsupport</a><BR>
Copyright (c) 1986-2005 by Cisco Systems, Inc.<BR>
Compiled Sat 02-Apr-05 21:22 by yiyan<BR>
<BR>
ROM: System Bootstrap, Version 12.3(8r)T8, RELEASE SOFTWARE (fc1)<BR>
<BR>
accurate-pri uptime is 3 weeks, 5 days, 2 hours, 39 minutes<BR>
System returned to ROM by reload at 22:37:40 UTC Sat May 13 2006<BR>
System image file is "flash:c2801-ipvoice-mz.123-11.T5.bin"<BR>
<BR>
Cisco 2801 (revision 5.0) with 115712K/15360K bytes of memory.<BR>
Processor board ID FTX0946Y355<BR>
2 FastEthernet interfaces<BR>
10 Serial interfaces<BR>
2 Channelized T1/PRI ports<BR>
1 DSP, 8 Voice resources<BR>
DRAM configuration is 64 bits wide with parity disabled.<BR>
191K bytes of NVRAM.<BR>
62720K bytes of ATA CompactFlash (Read/Write)<BR>
<BR>
Configuration register is 0x2102<BR>
<BR>
!<BR>
Any help greatly appreciated!<BR>
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