北电交换机的DDL延时拔号,IMM,WNK,OWK具体如何用>?...

请教.如题.

DDL Delayed Dial
The terminating trunk returns an off-hook to the originating
trunk, which is interpreted as an instruction not to send
digits immediately. This delay allows the terminating end to
find and attach digit collections equipment. When the
equipment is attached, the terminating end returns on-hook
which is interpreted as a signal to start sending digits.
For this application on incoming calls, the Meridian PBX
sends a non-programmable 256-384 ms pulse. For
outgoing calls, the Meridian PBX expects a delay-dial pulse
from the far end to terminate before sending digits. Some
types of delay-dial operation can also be accommodated by
the IMM option.
IMM Immediate
The terminating trunk is not expected to return a pulse
telling the originating end to begin sending digits. In this
application for incoming calls, the Meridian 1 returns a
256-384 ms off-hook/on-hook wink to the far end. This wink
accommodates certain types of delay-dial operation.
For outgoing calls, the Meridian 1 starts a 300 ms timer
when the outgoing trunk is seized. Digits are sent out when
an off-hook/on-hook wink returned from the far end ends, or
when the 300 ms timer expires (whichever occurs first).
MWNK Modified Wink (MWNK) is printed automatically for Taiwan
R1 trunks.
twr1-24
OWK Off-Hook Wink for RLR trunks equipped with signaling
converter
This mode of operation is similar to wink except that the
Meridian 1 waits one second after seizure before sending a
wink start pulse. This arrangement applies only to release
link remote trunks.