asterisk users - Mar 2004 - PRI: Read on 36 failed and Got reject for frame 23

Hello All,

Can anyone give some ideas what could be the problems?


    -- B-channel 14 successfully restarted on span 1
Mar  7 11:27:15 WARNING[65541]: chan_zap.c:5978 zt_pri_error: PRI: Read 
on 36 failed: Unknown error 500
Mar  7 11:27:15 NOTICE[65541]: chan_zap.c:6693 pri_dchannel: PRI got 
event: 6 on span 1
    -- B-channel 15 successfully restarted on span 1
    -- B-channel 16 successfully restarted on span 1

and

    -- Accepting call from '7750' to '2700' on channel 1, span 1
    -- Executing Wait("Zap/1-1", "1") in new stack
    -- Executing Answer("Zap/1-1", "") in new stack
    -- Executing Wait("Zap/1-1", "1") in new stack
Mar  7 11:29:28 WARNING[65541]: chan_zap.c:5978 zt_pri_error: PRI: !! 
Got reject for frame 23, retransmitting frame 23 now, updating n_r!
Mar  7 11:29:28 WARNING[65541]: chan_zap.c:5978 zt_pri_error: PRI: !! 
Got reject for frame 23, retransmitting frame 24 now, updating n_r!
Mar  7 11:29:28 WARNING[65541]: chan_zap.c:5978 zt_pri_error: PRI: Read 
on 36 failed: Unknown error 500
Mar  7 11:29:28 NOTICE[65541]: chan_zap.c:6693 pri_dchannel: PRI got 
event: 6 on span 1
    -- Executing Playback("Zap/1-1", "ionidea/transfer") in
new stack
    -- Playing 'ionidea/transfer' (language 'en')
    -- Executing Dial("Zap/1-1", "SIP/2700|30|tTH") in new
stack


Everything works fine, but it keep printing after random time this.

Here is my configs:

--- /etc/zaptel.conf
#
# Zaptel Configuration File
#
# This file is parsed by the Zaptel Configurator, ztcfg
#

span=1,1,0,esf,b8zs

bchan=1-23
dchan=24

loadzone = us
defaultzone=us

--- /etc/asterisk/zapata.conf
[channels]
language=en
context=default
switchtype=national
pridialplan=unknown
overlapdial=yes
signalling=pri_cpe
usecallerid=yes
hidecallerid=no
callwaiting=no
usecallingpres=yes
callwaitingcallerid=no
threewaycalling=no
transfer=no       
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
rxgain=0.0
txgain=0.0
group=1
callgroup=1
pickupgroup=1
immediate=no
musiconhold=default
jitterbuffers=50
channel => 1-23



-- 
Regards,
   Vasyl Rublyov
   vasyl.rublyov@ionidea.com

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