Lucent Technologies Comcode 108678723 manual Delay Interactions

DEFINITY ECS Release 8.2 ATM Installation,	Issue 1
Upgrades, and Administration 555-233-124	April 2000

BATM Switch Feature Interactions

Delay Interactions B-11

■Nonfacility Associated Signaling (NFAS)

■Off-Premises Station

■Personal Central Office Line (PCOL)

■Power Failure Transfer

■R2-MFC Signaling

■Recorded Announcement

■Recorded Telephone Dictation Access

■Restriction—Miscellaneous Trunk

■Trunk Flash

■Trunk Group Busy/Warning Indication

Delay Interactions

Delays in ATM cell delivery affects the ATM-PNC or ATM-CES features and functionality listed in Table B-5.

Additionally, WAN-PNC configurations (more than one ATM switch) require additional delay considerations:

1.Setting up an SVC through the PNC can be delayed by as much as 7 s, similar to an ISDN trunk.

2.An SVC request can fail, and this failure may not be received for several seconds.

3.Paths through the PNC are not free (however, tariffing of these resources is highly variable).

Table B-5. ATM delay interactions

Feature	Description
POTS (plain old telephone	Lets in normal point-to-point calls the terminating side does not ring
service)	until an SVC is established through the WAN.
AAR (Automatic Alternate	Route calls based on the preferred (normally the least expensive)
Routing)	route available at the time the call is placed.
ARS (Automatic Route
Selection)
AAR and ARS Overlap	Determines that if the call is to be routed to another switch over a
Sending	trunk with ISDN overlap sending, the system seizes the outgoing
	ISDN trunk and starts sending digits while DEFINITY ECS continues
	to collect (receive) the remaining incoming digits.