The procedures in this section cover the specific fields you must administer when you create each type of trunk group. Here are some tips for working with common fields that are available for most trunk groups.
Dial Access — Type y in this field to route calls through an outgoing or two-way trunk group by dialing its trunk access code.
Security alert:
Calls dialed with a trunk access code over Wide Area Telecommunications Service (WATS) trunks are not validated against the ARS Digit Analysis Table, so users can dial anything they need. For security, you might want to leave the field set to n unless you need dial access to test the trunk group.
Outgoing Display — Type y in this field so that the display telephones can show the name and group number of the trunk group used for an outgoing call. This information might be useful to you when you’re trying to diagnose trunking problems.
Queue Length — Don’t create a queue for two-way loop-start trunks, or you might have a problem with glare (the interference that happens when a two-way trunk is seized simultaneously at both ends).
Trunk Type — Use ground-start signaling for two-way trunks whenever possible: ground-start signaling avoids glare and provides answer supervision from the far end. Try to use loop-start signaling only for one-way trunks.
