[Asterisk-Users] zaphfc: empty HDLC frame or bad CRC received

[Nick Barnes]

Hi,

Don't know if you've sorted this or not, but....

> zaphfc: empty HDLC frame or bad CRC received (framelen = 5, 
> stat = 0xff,
> card = 0).

I've only ever seen when the signalling is wrong. For example if the line is
in PTMP mode when it should be in PTP or vice-versa.

> this is the zapata.conf:
> group = 1
> context=default
> signalling = bri_net_ptmp
> channel => 1-2

So, you're using NT mode PTMP signalling.

Is the Asterisk box plugging into an ISDN circuit provided by a telco? If it
is, then use "bri_cpe_ptmp" (for Point to MultiPoint) or "bri_cpe" (for
Point to Point) instead of "bri_net_ptmp". If it's plugged into a different
ISDN device and needs to be in NT mode, then try "bri_net" instead.

Have fun,

Nick.