[asterisk-users] DAHDI help please

[Pat Collins]

Shaun,
To make more sense of the code, I changed 
#define DAHDI_XBIT		(3 >> 2) to 
#define DAHDI_XBIT		(0)

Sadly, incoming calls do not work.  Not sure exactly how to START or RING
when the RX AB bits are 00
Any ideas?
Thanks again for your help!

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Pat Collins
Sent: Tuesday, October 02, 2012 2:48 PM
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: Re: [asterisk-users] DAHDI help please

Thank you for the reply!
So far, I've managed to get the on off hook to work properly!
My next problem is the incoming ring. I've changed the /include/dahdi/user.h
file:
#define DAHDI_ABIT		(1 << 3)
#define DAHDI_BBIT		(1 << 2)
#define DAHDI_CBIT		(1 << 1)
#define DAHDI_DBIT		(1 << 0)
#define DAHDI_XBIT		(3 >> 2)  ADDED THIS!!

#define DAHDI_BITS_ABCD (DAHDI_ABIT | DAHDI_BBIT | DAHDI_CBIT | DAHDI_DBIT)
#define DAHDI_BITS_ABD (DAHDI_ABIT | DAHDI_BBIT | DAHDI_DBIT) #define
DAHDI_BITS_ACD (DAHDI_ABIT | DAHDI_CBIT | DAHDI_DBIT) #define DAHDI_BITS_BCD
(DAHDI_BBIT | DAHDI_CBIT | DAHDI_DBIT) #define DAHDI_BITS_AC (DAHDI_ABIT |
DAHDI_CBIT) #define DAHDI_BITS_BD (DAHDI_BBIT | DAHDI_DBIT)
#define DAHDI_BITS_X   (DAHDI_XBIT) AND THIS!!

Then in /driver/dahdi/dahdi-base.c I changed:
static void dahdi_rbs_sethook(struct dahdi_chan *chan, int txsig, int
txstate,
                int timeout)
{
        static const struct {
                unsigned int sig_type;
                /* Index is dahdi_txsig enum */
                unsigned int bits[DAHDI_TXSIG_TOTAL];
        } outs[NUM_SIGS] = {
                {
                        /*
                         * We set the idle case of the DAHDI_SIG_NONE to
this pattern to make idle E1 CAS
                         * channels happy. Should not matter with T1, since
on an un-configured channel,
                         * who cares what the sig bits are as long as they
are stable
                         */
                        .sig_type = DAHDI_SIG_NONE,
                        .bits[DAHDI_TXSIG_ONHOOK]  = DAHDI_BITS_ABCD,
                }, {
                        .sig_type = DAHDI_SIG_EM,
                        .bits[DAHDI_TXSIG_OFFHOOK] = DAHDI_SIG_NONE,   /*
changed from ACD */
                        .bits[DAHDI_TXSIG_START]   = DAHDI_SIG_NONE,   /*
changed from ACD */
                        .bits[DAHDI_TXSIG_ONHOOK]  = DAHDI_BITS_ABCD, /*
added this !! */
                        .bits[DAHDI_RXSIG_START]    = DAHDI_BITS_X,  /*
start.. xbit */
                        .bits[DAHDI_RXSIG_RING]    = DAHDI_BITS_X,  /*
ring.. xbit */
                }, {	

And this:
void dahdi_rbsbits(struct dahdi_chan *chan, int cursig) {
        unsigned long flags;
        if (cursig == chan->rxsig)
                return;

        if ((chan->flags & DAHDI_FLAG_SIGFREEZE)) return;
        spin_lock_irqsave(&chan->lock, flags);
        switch(chan->sig) {
            case DAHDI_SIG_EM: /* was FXO Groundstart */
                /* B-bit only matters for FXO GS !!!!changed BBIT to
XBIT!!!! */
                if (!(cursig & DAHDI_XBIT)) {
                        __dahdi_hooksig_pvt(chan, DAHDI_RXSIG_START);
                        break;
                }
                /* Fall through */
            case DAHDI_SIG_FXOGS:  /* changed from E and M */
            case DAHDI_SIG_EM_E1:
            case DAHDI_SIG_FXOLS: /* FXO Loopstart */
            case DAHDI_SIG_FXOKS: /* FXO Kewlstart */
                if (cursig & DAHDI_ABIT)  /* off hook */
                        __dahdi_hooksig_pvt(chan,DAHDI_RXSIG_OFFHOOK);
                else /* on hook */
                        __dahdi_hooksig_pvt(chan,DAHDI_RXSIG_ONHOOK);
                break;

Thank you for your help Shaun!!!

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Shaun Ruffell
Sent: Tuesday, October 02, 2012 2:17 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] DAHDI help please

On Mon, Oct 01, 2012 at 06:44:22PM -0400, Pat Collins wrote:
> Can anyone tell me if it is possible to invert the signaling bits on a
> T1 channel?
>
> I need to emulate PLAR signaling in asterisk.  E&M seems to be an 
> exact match if reversed.
>
> I need idle bits 1111 and seized 0000

Perhaps you could edit dahdi_rbs_sethook() and dahdi_q_sig()?  Those
function map state to RBS states.

--
Shaun Ruffell
Digium, Inc. | Linux Kernel Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA Check us out at:
www.digium.com & www.asterisk.org

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_____________________________________________________________________
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