For voice communications, the Avaya IR must be connected directly to one of the following:
You can connect up to two T1 or E1 facilities to each NMS dual card or up to four T1 or E1 facilities to each NMS quad card installed on the Avaya IR system. These facilities may receive calls directly from the PSTN or they may connect to an Avaya MultiVantage system or to a non-Avaya switch
Trunks connect to the back of the:
See AG 4000 Installation and Developer's Manual for more information on connecting trunks to the telephony cards. For information on connecting trunks to a MultiVantage system or non-Avaya switch, see the appropriate MultiVantage documentation or documentation from the manufacturer.