New England Telephone offers Residential ISDN service from the following CO's: Boston: Harrison Ave and Franklin St Cambridge: Ware St Danvers Framingham Lawrence Marlborough Worcester Amherst Canton Webster Weymouth Rockland this list is curent on 12/15; it changes monthly. The following numbers are for Residential ISDN, voice and switched-circuit data: Installation $15 Monthly $20 Per call, data $0.026/1st min, $0.016/add'l min Per call, voice same as current (Metro service or whatever) 10 call appearances: installation $30, $5.20/month Currently, only intra-CO data calls are available; this should change in about 3-6 months. The rates then will probably the same as for zone 1 voice calls, which is the same as for intra-co calls as above. q: is the install above for both voice and data, or add't for data? Same for monthly? How many appearances by default? Where can sets be acquired? Lead time? cost for appearances of another number on the same isdn line? can two lines both have appearances of each other's numbers on them? Can two sets be used for a call on the same appearance, as is done now with analog phones?