asterisk users - Aug 2006 - Using asterisk to simulate ISDN BRI line

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I am trying to get 2 Asterisk servers to communicate over an ISDN2e line.

Each is running Asterisk 1.2.10 + Bristuff driving a HFC-S chipset BRI
card.  One is configured as bri_net_ptmp, the other as bri_cpe_ptmp.

I have built a crossover cable wired as

(Rx+) 3 ------ 4 (Tx+)
(Tx+) 4 ------ 3 (Rx+)
(Tx-) 5 ------ 6 (Rx-)
(Rx-) 6 ------ 5 (Tx-)

However the slave (cpe) Asterisk box always reports that the
D-channel is unavailable.  While the master (net) box seems happy.

Changing to ptp mode (bri_net and bri_cpe signalling) causes both boxes to
report a lack of D-channel.

Can anybody tell me where I am going wrong?

- --
Ron Wellsted
ron@wellsted.org.uk http://www.wellsted.org.uk
N 52.567623, W 2.137621 Linux Counter No. 202120
FWD:519961
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