Siemens Rolm and Asterisk - PBX Info :: Your Free PBX, PABX and Telephone Information Resource

Neuronal · 01-23-2008, 04:59 PM

Hi all,

I would like to have a question...

We have in the company in use a Siemens Rolm CBXII and would like to know if there is a way to connect it to a Asterisk system.

The reason why we would like to do this is, that our voice mail system is close to the edge (dead). So my idea was to have one or more analog trunks to a Asterisk system and just use the voice mail function. And to forward some CID's to it, too.

Does someone has any experience with this

Thanks for the help

PP · 01-23-2008, 05:27 PM

The Only Way You Could Give The Asterisk Cid Is A Isdn-pri And That Is Not Do-able With The Rolm, The Isdn Application Was Very Limited To A Couple Of Central Offices And It Does Support Qsig

Neuronal · 01-28-2008, 07:59 AM

So what would be the best practice to create a connection between the the two pbx and what needs to be done on the Rolm? I can cover the Asterisk part but i have no clue about the Rolm pbx.

PP · 01-28-2008, 10:45 AM

Either A Regular T1 Built As Tie Lines Or Analog Extensions

jkinard · 02-15-2008, 07:16 PM

Heya,

Running into a similar scenario here of linking an old Rolm 9751 CBX with an Asterisk server. I've implemented the T1 hook up (got that idea from my vendor who works on the Rolm), and I'm having a devil of a time in getting the two to communicate.

The purpose is to setup a fax-to-email system that follows a path like so (for incoming):

Carrier -> Rolm -> T1 -> Asterisk -> IAXmodem -> HylaFax

Right now, I'm working on the Rolm-to-Asterisk portion, having already tested out a basic working IAXmodem/HylaFax hookup.

The problem seems to be a timing issue, whereby I dial an extension on a Rolm Phone, and it tries to ring into the asterisk server, but gives up and emits busy tone after several seconds. A second after I get busy tonem the Asterisk server wakes up and tries to respond, sending back down the Wink signal and all, but because the Rolm has already given up, the Asterisk gets no answer, and so quits as well.

And this is using only one channel in my T1 (Rolm has one trunk configured; Asterisk is instructed to only use 1 channel). If I enable 2 or more channels, the Rolm will cycle through all of the channels trying to get an answer, and by the time it hits Channel 3 on the T1, the Asterisk server will wake up and signal back on Channel 1, followed shortly thereafter by Channel 2, then Channel 3 (which by then, the Rolm will be way ahea,d or have quit).

The way things are configured is, on the Rolm side, the extension that will be the fax extension maps to a hunt group. The hunt group maps to a trunk access code and passes the hunt groups extension (i.e., no extensions defined in the hunt, but the Busy number gets changed to XXYYYY, where XX is the trunk access number and YYYY is the four-digit extension of the targeted fax extension, as the Rolm will dial the busy number when there are no defned target extensions).

The T1 parameters are Mode ESF, Format B8ZS, Signalling is E & M Wink.

For the Rolm, Wink time is 200ms, flash in is 200ms, flash out is 300ms, start time is 4500ms (these seem to be relevant, alterable values n the asterisk side).

Asterisk, I found I have tp use signaling=em, as that looks to be the Wink version (whereas em_w looks like its immediate -- bug?). Only using 1 channel, mode and format all match up. I tried fiddling with the timing values, but didn't make much headway. Asterisk always takes too long to wake up and grab the trunk before the Rolm quits on it.

Don't suppose anyone knows of anything useful I can tweak on the Rolm to get things working? I suspect this is where the problem is at, but I haven't ruled Asterisk out yet, either.

Thanks!,

--jkinard

PP · 02-16-2008, 12:31 PM

What's happening is the the Rolm is sending a off-hook to Asterisk and is waiting for a wink back from it, the wink is not within the parameters of the Rolm Trunk_Group. Your going to have to play with the timing on the Trunk_Group, try changing your Reseize Delay from the default of 2000 to 3000. The timers you are talking about are all default, you will most likely have to play with them till you get it.

jkinard · 02-16-2008, 04:48 PM

Hmm, that does seem to match up with what the monitoring on the Rolm shows. The Reseize delay field in the trunk group allows for a pretty high value too (up to 24.5 seconds), and that's one I didn't toy with at all. I'll try this when I get back to the office on Tuesday.

Here's the monitor output I got. Notes on the far right are mine:

Code:

TRK#    STATE              INL/XDI     CODE DIGITS           PROCESS     TEM SZ
------- ------------------ ----------- ---- ---------------- ----------- --- --
1       IDLE                                                                OU  Idle
 
1       OUTPULS S01/011501             80                                   OU  fax ext. dialed (80=trk group)
 
1       OUTPULS S01/011501
 
1       IDLE
 
1       IDLE                                                 RESZ DELAY         Rolm quits here; busy tone
 
1       SI RSVD
 
1       RING-IN                                                                 Asterisk rings back
 
1       DIAL TO R01/011103
 
1       DIAL TO R01/011103                                                W     Wink sent to Rolm
 
1       BUSY                                                                    Busy because no one answered
 
1       BUSY                                                                    Asterisk hangs up
 
1       IDLE
 
1       IDLE                                                 RESZ DELAY 
 
1       IDLE

PP · 02-16-2008, 05:38 PM

And you are correct about the Rolm trying to complete the call if you have more than one trunk, even Nortel will do it. It's kind of transparent to the customer, but if you pay attention you will realize that the call is taking a litlle longer to complete

jkinard · 02-17-2008, 03:31 AM

Yeah, I guess there's not much I can do to get the asterisk side to answer any quicker. I might inquire on asterisk-users about that, but if getting the Rolm to wait a little longer for the call works, that'll be fine too.

Thanks for the tip! I'll see how tweaking that reseize delay value pans out.

--jkinard

jkinard · 02-19-2008, 11:53 AM

Hmm, doesn't seem like tweaking the Reseize Delay or even the Seize Time (under Incoming (1)) has any effect. Keeping both the Rolm monitoring output and the Asterisk output up on the screen, the Rolm is giving a busy signal before Asterisk emits the line "Starting simple switch on 'Zap/1-1'". I even maxed this value to 24500ms and got almost no change, and the trunks were definitely idle for several seconds before I attempted (so that the firmware updates).

In fact, it almost looked like that the Rolm hung up right as Asterisk emits that line. Keeping both screens side-by-side, I see the Rolm go "IDLE" right as Asterisk states "Starting simple switch on 'Zap/1-1'". Might there be some communications issue between the two? I.e., Asterisk sends some kind of garbled frame data and the Rolm just ignores it?

Here's how my trunk group is configured. RESEIZE DELAY under OUTGOING (1) and SEIZE TM under INCOMING (1) are the two values off of their defaults:

Code:

COMMAND: L TRUNK_GROUP FXT1

GENERAL ATTRIBUTES (1)

    TKGP TKGP  H/W   OUT   DISC   DISC   ERROR CHECK   PERM  CDR  EXCL STATS
    NAME TYPE  TYPE ATTRBS TM(MS) SUPV ST LN MX PM NC   TM   TYPE  TBL   ?
    ---- ----- ----   -    -----   -   -  -  -  -  -   -----  -    --    -
DS  FXT1 TIE
DS  FXT1 TIE   T1     N    450     B   Y  N  N  Y  Y   45     N          Y

GENERAL ATTRIBUTES (2)

     ACD QUEUE   ACD OVFL     ACD   CAS      LOSS      START   BUSY
     PRIORITY    PRIORITY    STAT?  GROUP   SRV TYP    TYPE    BACK
        --          --         -      -     ------     ----    ----
DS      64          1          N      N     D/SATT     WINK    IDLE

GENERAL ATTRIBUTES (3)

                    DISPLAY     ISDN
                    GROUP       ADAPT
   NAME             NAME?       TYPE
   ---------------- -           ----
DS                  N           NO

GENERAL ATTRIBUTES (4)

     ALARMS (%)           DOWN
     ?  MAJOR MINOR       LIMIT (%)
     -   ---   ---         ---
DS   Y   50    10          50

OUTGOING (1)

    REG  FRS    DTRAN QUEUE HUNT RESEIZE  ATC  GLARE  DELAY  STOP  STOP-SUPV
    TYPE CT? DT  TBL  ? HT  TYPE DELAY   CNTRL RETRY  OUT    DIAL RETRY TM
    ---  -  ---- ---  - --    -   -----    -     -    -----   -    -    ----
DS  HRS  Y  D         N 0     R   24500    N     Y    1000    N    N    30

START, AND ANSWER ATTRIBUTES

  START - SUPERVISION                ANSWER - SUPERVISION
 ?     TIME      RETRY              ?  MIN TM  DROP  TMOUT
 -     -----       -                -  -----    -     ---
 Y     4500        Y                Y  20       N     3

INCOMING (1)

        SEIZE DISA    DIAL   DIGIT   DTRAN DID RING  DID   ATC DNIS
    COS  TM    ?   DT TONE  TM  INTC  TBL  T-T  TM  ACDMAX GRP TBL  RINGDOWN
    --- ----   -   -   --   ---   -   ---   -   --   ---   --  ---  --------
DS  0   490    N   D   N    10    N         Y              1

STATE MESSAGING ATTRIBUTES

    GLITCH    FLASH    FLASH    FLASH    WINK
      TM        ?       IN       OUT      TM
      ---       -      ----     ----      ---
DS    20        Y      200      300       200

Anything look odd in those? I think I've tried toying with most of the other time values to make them wait longer, but it hasn't had any effect. I'm wondering if I'll have to bug people on the asterisk-users ML on why chan_zap takes so long to wake up and grab the line.

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