D210P One-way audio after a while

I have a D210P in an IBM x335 Server connected to one Intertel PBX Sideline T1. I have another configuration similar to another T1 in the same PBX that is working fine (It uses a Digium card though). The problem with my D210P is I get, after a while of working fine (maybe 10 minutes), one way audio, asterisk users can hear just fine, but the remote user just gets nothing or a constant tone, not sure what causes one or the other. It continues to not work until the server is reboot (restarting asterisk and re-running dahdi-cfg does not fix the issue, neither does reseting the Remote end or unplugging the T1). The card and remote end doesn't display any alarms. dahdi_monitor records both sides of the conversation just fine, and levels look good, even when having the issue. I have verified the remote end is not setting any alarms and is set to "Masters for Private Network", which should generate the clock, which works just fine with my other Asterisk server and digum card. I think this is a clock issue, but I am not sure why the digium setup works but this one doesn't, any ideas?

Asterisk Version: Asterisk 1.6.0.10
DAHDI Version: 2.1.0.4 Echo Canceller:

/proc/interupts
CPU0 CPU1 CPU2 CPU3
0: 561569 0 0 0 IO-APIC-edge timer
1: 9 0 0 0 IO-APIC-edge i8042
3: 0 0 0 0 IO-APIC-level acpi
6: 5 0 0 0 IO-APIC-edge floppy
8: 1 0 0 0 IO-APIC-edge rtc
11: 0 0 0 0 IO-APIC-level ohci_hcd:usb1
12: 105 0 0 0 IO-APIC-edge i8042
15: 80 4567 0 0 IO-APIC-edge ide1
169: 4538 526 3480 0 IO-APIC-level ioc0
177: 94 9927 0 66 IO-APIC-level eth0
193: 12735 648000 0 40978 IO-APIC-level wct2xxp
NMI: 0 0 0 0
LOC: 561202 561201 561200 561199
ERR: 0
MIS: 0

/etc/dahdi/system.conf

# Span 1: TE2/0/1 "T2XXP (PCI) Card 0 Span 1" (MASTER) B8ZS/ESF ClockSource
span=1,1,5,esf,b8zs
e&m=1-24
#echocanceller=mg2,1-24

# Span 2: TE2/0/2 "T2XXP (PCI) Card 0 Span 2"
#span=2,2,5,esf,b8zs
# termtype: te
#echocanceller=mg2,25-47

# Global data

loadzone = us
defaultzone = us

asterisk chan_dahdi.conf

; Span 1: TE2/0/1 "T2XXP (PCI) Card 0 Span 1" (MASTER) B8ZS/ESF ClockSource
group=0
;context=from-pstn
context=from-zaptel
signalling = em_w
channel => 1-24
;immediate=yes

; Span 2: TE2/0/2 "T2XXP (PCI) Card 0 Span 2"
;group=0,12
;context=from-pstn
;switchtype = national
;signalling = pri_cpe
;channel => 25-47
;context = default
;group = 63

DMESG output

Jun 23 18:16:38 asterisk2 kernel: dahdi_transcode: Loaded.
Jun 23 18:16:38 asterisk2 kernel: INFO-xpp: revision trunk-r6056 MAX_XPDS=64 (8*
Jun 23 18:16:38 asterisk2 kernel: INFO-xpp: FEATURE: without BRISTUFF support
Jun 23 18:16:38 asterisk2 kernel: INFO-xpp: FEATURE: with PROTOCOL_DEBUG
Jun 23 18:16:38 asterisk2 kernel: INFO-xpp: FEATURE: with sync_tick() from DAHDI
Jun 23 18:16:38 asterisk2 kernel: INFO-xpp_usb: revision trunk-r6056
Jun 23 18:16:38 asterisk2 kernel: usbcore: registered new driver xpp_usb
Jun 23 18:16:38 asterisk2 kernel: About to enter spanconfig!
Jun 23 18:16:38 asterisk2 kernel: About to enter startup!
Jun 23 18:16:38 asterisk2 kernel: TE2XXP: Span 1 configured for ESF/B8ZS
Jun 23 18:16:38 asterisk2 kernel: wct2xxp: Setting yellow alarm on span 1
Jun 23 18:16:38 asterisk2 kernel: timing source auto card 0!
Jun 23 18:16:38 asterisk2 kernel: SPAN 1: Primary Sync Source
Jun 23 18:16:38 asterisk2 kernel: Completed startup!
Jun 23 18:16:38 asterisk2 kernel: timing source auto card 0!
Jun 23 18:16:43 asterisk2 kernel: wct2xxp: Clearing yellow alarm on span 1

i] Last edited by jimbo333 at 2009-6-24 09:21 [/i

in this case I suggest you try another version of zaptel or asterisk.

what is your current h/w and s/w? the cpu? motherboard?memory? linux version? zaptel/asterisk version?

I have tried a couple different versions, most of the info you asked for is in the origonal post, but here is the summary:

Linux: CentOS 5.3 (Kernel 2.6.18-128.1.14.el5) (AsteriskNOW 1.5)
DAHDI Versision: 2.1.0.4
Asterisk Version: Asterisk 1.6.0.10

I though it might be a version specific issue, so I was originally using Asterisk 1.4, upgrading to 1.6 did not fix the issue.

Server: IBM x335, Pentium4 Xeon 3.06GHz (2x with hyper-threading, for a total of 4 reported by Linux), 4GB DDR ECC IBM Memory.

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