[Freeswitch-users] variable_caller_ton is not set

[mbo]

We have 2 Freeswitches with a Sangoma A200  connected with an crossed E1 cable. Wanrouter is version 3.5.24, Freeswitch version is FreeSWITCH Version 1.0.head (git-3004fa0 2012-02-15 16-24-21 -0600).  If I originate a call from one freeswitch to the other, I can see that the TON (type of number) for called and calling party is set.
...

Prot Disc:Q.931/I.451 (0x08)
  Call Ref:0005 (Originating side)
  Type:SETUP (0x5)
  Sending complete:
  Bearer Capability:Coding:ITU-T(0) TransferCap:Speech(0) TransferRate:64 Kbit/s(16) L1Prot:G.711 A-Law(3)
  Channel Id:No:1 Type:B-chans(3)  Exclusive/Implicit 
  Calling Party Number:221XXXXXXX(l:13) plan:isdn(1) type:national(2)scr:user, passed(1) pres:allowed(0)
  Called Party Number:49221XXXXXX(l:15) plan:isdn(1) type:international(1)
  [ 08 02 00 05 05 a1 04 03 80 90 a3 18 03 a9 83 81 6c 0f 21 81 32 32 31 34 30 30 36 37 38 33 31 30 
    32 70 10 91 34 39 32 32 31 34 30 30 36 37 38 33 32 30 32 ]
...

But in the caller profile variables, the variable "variable_caller_ton" is not set. On our production system, connnected to the real PSTN, this variable is always set (also with the same freeswitch version). What could be the reason why "variable_caller_ton" is not set?

Thanks

Markus