asterisk users - May 2005 - E1 PRI Warnings

Hi, 

I've connected a TE110P from digium with a 2 E1 to a Siemens PBX using
asterisk from ubuntu linux.

Everything is working as expected. This box is being used as a H323
gateway to the pstn. There are few complains but it is working pretty
well overall.

There is one thing that is bothering me.

Asterisk says:

May 22 05:03:39 WARNING[9360]: PRI: !! No channel map, no channel, and no ds1? 
What am I supposed to identify?
May 22 05:03:39 WARNING[9360]: PRI: !! Unable to add IE 'Channel
Identification'

And Siemens Say:

Alarm channels lockout 

I don't know if these two warnings are related (i am guessing). But the
guy from Siemens is not very happy with this.

Here are my questions:

1. Can these two warnings be related?
2. How can i change asterisk configuration to stop Siemens complains?
3. What are the possible consequences of these warnings?

Thanks in advance

These are my config files:

/etc/zaptel.conf

loadzone = us
defaultzone=us
span=1,0,1,ccs,hdb3,crc4
bchan=1-15
dchan=16
bchan=17-31
span=2,0,1,ccs,hdb3,crc4
bchan=32-46
dchan=47
bchan=48-62

/etc/asterisk/zapata.conf

[trunkgroups]

[channels]
context=default
switchtype=national
pridialplan=unknown
prilocaldialplan=unknown
rxwink=300              ; Atlas seems to use long (250ms) winks

usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=yes
rxgain=1.0
txgain=1.0
group=1
callgroup=1
pickupgroup=1

immediate=no
busydetect=yes
busycount=4



group = 2
switchtype = national
signalling = pri_cpe

channel => 1-15
channel => 17-31
channel => 32-46
channel => 48-62






Jorge

-- 
Jorge Verastegui <jorge@redcetus.com>
RedCetus

Am Montag, den 23.05.2005, 12:07 -0400 schrieb Jorge
Verastegui:
> Hi, 
> 
> I've connected a TE110P from digium with a 2 E1 to a Siemens PBX using
> asterisk from ubuntu linux.
> 
> Everything is working as expected. This box is being used as a H323
> gateway to the pstn. There are few complains but it is working pretty
> well overall.
> 
> There is one thing that is bothering me.
> 
> Asterisk says:
> 
> May 22 05:03:39 WARNING[9360]: PRI: !! No channel map, no channel, and no
ds1?  What am I supposed to identify?
> May 22 05:03:39 WARNING[9360]: PRI: !! Unable to add IE 'Channel
Identification'
> 
That is a bug in libpri. The Siemens sends a RESTART message containing
no Channel Identification IE. This is perfectly valid according to the
ETSI standard. It is supposed to restart the entire interface ( == all
B channels). Asterisk doenst reply to this RESTART message with a
RESTART ACKNOWLEDGE message so the Siemens might be unsure about the
state of the B channels and wont send incoming calls to Asterisk 
(however outgoing calls might still work and "restart" B channels
on those used channels).

A simple fix (ripped from bristuff) would be to put a:
        if (msgtype == Q931_RESTART_ACKNOWLEDGE) {
            return 0;
        }

before the lines:
        pri_error("!! No channel map, no channel, and no ds1?  What am I
supposed to identify?\n");
        return -1;

in q931.c (function static FUNC_SEND(transmit_channel_id)).

Then Asterisk replies with a RESTART ACK message containing no
Channel Identification IE.

best regards

Klaus
--
Klaus-Peter Junghanns