Administration for Direct Inward and Outward Dialing (DIOD) trunk groups varies from country to country. Go to the Avaya Support website at http://support.avaya.com for more information. Remember that the central office serving your switching system might be emulating another country’s network protocol. If so, you’ll have to administer your circuit packs and trunk groups to match the protocol used by your central office.

If you are using Incoming Caller ID (ICLID) on analog trunks connected to a DIOD Central Office trunk circuit pack, DO NOT put these trunks in an outgoing AAR or ARS route pattern. Since the loop-start trunks supported on the DIOD Central Office trunk circuit pack do not provide answer supervision, the potential for toll fraud exists.