Dear k.Prapassorn,
On this morning, we
found the 1toall equipment 1 unit problem (Detail: Line not disconnect and
redirect to operator).
So, I solve this
problem by change to ISDN line for call out temporary and waiting your
engineering onsite for resolve again.
Attached file is
expense telephone cost via ISDN on 08:00-09:00 am. Please investigate to
discount monthly fee on this month too.
Should you have any
queries, please do not hesitate to contact our IT Service Desk :1313 or me
directly.