Panasonic KX-TDA600 Feature Manual page 222

1.13 P
c)
Blocking CO line calls made through another PBX and how to override it:
Whether an incoming TIE line call can make a CO line call through this PBX (i.e., PBX-2),
depends on the COS that is assigned to the trunk group of this PBX, that the incoming TIE line
is connected to. If the COS of the trunk group is unable to make outgoing calls by the TRS or
External Call Block feature, CO line calls made through this PBX will be prohibited.
To override this prohibition, an extension of PBX-1 must enter a verification code assigned to
PBX-2 to change the COS temporarily. It is also possible to override the prohibition by
specifying an extension at PBX-2 with the Walking COS feature, to temporarily switch to that
extension's COS.
→ 2.9.11 [2-7-1] Class of Service—COS Settings—TRS—TRS Level—Day, Lunch, Break,
Night
→ 2.9.12 [2-7-2] Class of Service—External Call Block
→ 2.10.1 [3-1-1] Trunk Group—TRG Settings—Main—COS
→ 2.13.3 [6-3] Verification Code
→ [500] Trunk Group Number
[Programming Example of PBX-2]
Trunk Group No.
TRG of Incoming
: Block
222 Feature Manual
COS No.
1
2
3
:
Call
TRG 1 TRG 2
COS 1
COS 2
COS 3
: :
3
2
2
:
Outgoing Call
...
TRG 3
: : :