SL-100 Web Log

ISDN Trunk Routing

January 9th, 2024

In the last post, I got a PRI trunk provisioned. The next thing to do is configure routing using the new trunk.

I'll add my first route in OFRT.

 RTE                                                                 RTELIST
                                                                     OPTIONS
----------------------------------------------------------------------------
   3           (        ISA N N N   LBRDILLG01T0 N    PUB NONE   N N     0)$
                                                                           $

The ISA route selector stands for integrated services access. This isn't the only type that will work, but it is suited to ISDN trunks. The first 3 options disable off-hook queuing, call-back queuing, and expensive route warning tones. Following that, the CLLI for the trunk group is specified. I set the call type to public, set the operator access type to none, did not use a transit network selector, did not require calling number ID, and chose no digit manipulation.

Then I went into FNPACONT.RTEREF so that I could reference the route from FNPACODE.

 RTE                                                                 RTELIST
----------------------------------------------------------------------------
   1                                            (          T     OFRT    3)$

Then in FNPACODE, I changed all the other codes to route over the new trunk:

FROMDIGS TODIGS RTEREF CAMAAUTH
-------------------------------
     200    562      1        Y
     563    563    563        Y
     564    999      1        Y

For outbound calls to work, you also need to create a relevant tuple in LTCALLs. Consequently, this also determines how inbound calls get routed.

            LTID                                                 XLARTSEL
                                                                     OPTIONS
----------------------------------------------------------------------------
 PRI    1    PUB                       XLALEC   0 222_POTS_0 NLCA_NILLA_0
                                                                           $

This configures calls from our PRI 1 logical terminal that have a public type to route using normal local exchange carrier translations. I refer to the line attribute index, translation plan, and rate area we set up several blog posts back.

This gets us routing for codes in the NPA that aren't assigned to this switch, but we can also reroute DNs that are assigned to the switch. While you can do that in DNROUTE, it can also be done from SERVORD, so we'll do it there.

SO:
>newdn
SONUMBER:     NOW  24  1 13 PM  
>
SNPA: 
>222
BLOCK_OF_DNS: 
>yes
FROM_DN: 
>5632000
TO_DN: 
>999
VDNTYPE: 
>rte
ROUTE: 
>ofrt 3
OPTION: 
>$
COMMAND AS ENTERED:
NEWDN NOW 24 1 13 PM 222 YES 5632000 999 RTE OFRT 3 $ 
ENTER Y TO CONFIRM,N TO REJECT OR E TO EDIT
>y
>

That routes the entire 2XXX thousand block using OFRT 3 that we set up earlier.