[Asterisk-Users] Siemens EWSD 13

[CW_ASN]

In fact, with EWSD V13 you can't remove CRC4 in PRI mode.

Regards,

Gus

----- Original Message -----
From: "Storer, Darren" <starusers at comgate.tv>
To: <asterisk-users at lists.digium.com>
Sent: Wednesday, April 07, 2004 8:32 PM
Subject: RE: [Asterisk-Users] Siemens EWSD 13


> Hi,
>
> I had exactly the same symptoms today with a co-located * connected to a
> Public Switch here in the UK. The problem was solved by insisting that the
> Telco turned on CRC4 at their end and then, after an 'init 6', layer two
> settled down on both systems.
>
> I was taught that if you are connecting to a full specification Q.931
> circuit, CRC4 should be enabled by default; in the event that one end does
> not support CRC4 the other end should auto-negotiate back and the circuit
> should still align without problems. Having said all of this I have yet to
> see auto-negotiation of CRC4 on any equipment (Public Network or CPE) and
> suspect that I was not told the truth in the first place...
>
> Selection of CRC4 seems to be random from Telco to Telco even on an
install
> by install basis within the same Carrier. It's the first thing to check
when
> new kit appears to be unstable..
>
> HTH
>
> Darren
> --
> Comgate
> Telco>Internet<Broadcast
>
> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com
> [mailto:asterisk-users-admin at lists.digium.com]On Behalf Of
> asterisk at geek.be
> Sent: 07 April 2004 14:59
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] Siemens EWSD 13
>
>
> Hi all,
>
> Has anyone got any experience with hooking Asterisk up with a
> Siemens EWSD 13 switch over a E1/PRI ?
> We're located in Belgium (Europe) and one of our telecom partners
> uses this switch.
>
> We connected one of our TE410P ports with their switch, but the status
> light on the TE410P card keeps blinking red.
> On their side they are getting a DSA (distance service alarm) error, so
> this normally means the devices 'see' eachother.. but there are still
> problems with the signalling.
>
> Our config below is the same as we are using for MCI, one of our other
> telecom partners.
>
> We tried changing the LBO and timing, but no luck.
> As you see the signalling is carried over channel 16 (default).
>
> TX and RX have also been regularly switched, so no luck..
>
> Their switch is providing the timing.
>
> The telecom operator has double checked the asterisk config several
> times, and it's conform to their setup.
>
> The only thing they couldn't find in the Asterisk config is a
> 'multiframing' option. But I presume this is automatically detected or
> set by default ?
> They also tried normal/single(?) framing, but no difference.
>
> The card has also been tested with our MCI E1, and works flawlessly, so
> no hardware issue.
>
> Anyone got any further ideas ?
>
> Any info or help greatly appreciated!
>
> Our config,
>
> *** zaptel.conf ***
> span=1,1,6,ccs,hdb3,crc4,yellow
> bchan=1-15
> bchan=17-31
> dchan=16
>
> *** zapata.conf ***
> [channels]
> switchtype=euroisdn
> signalling=pri_cpe
> pridialplan=unknown
>
> group=1
> channel => 1-15,17-31
>
> <other zapata standard config>
>
>
>
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