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<title>Voice clipping on Cisco PRI</title>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Keith Burns<br>
<b><span style='font-weight:bold'>Sent:</span></b> June 8, 2006 7:17 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">cisco-voip@puck.nether.net</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> [cisco-voip] Voice
clipping on Cisco PRI</span></font><o:p></o:p></p>
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12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=1 face=Verdana><span style='font-size:9.0pt;
font-family:Verdana'>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!</span></font><o:p></o:p></p>
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