Number | Name | Date | Kind |
---|---|---|---|
3859473 | Brown et al. | Jan 1975 | |
4596010 | Beckner et al. | Jun 1986 | |
4602363 | Das et al. | Jul 1986 |
Entry |
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"Call Transfer Feature Document 1 and 1A ESS.TM. Switches" AT&T Practice, SPCS AT&T 231-090-079 Addendum, Issue 1, Jul., 1985. |
Part V, Pages V-16 through V-19, V-65 through V-93 and V-133 through V-135 of ISDN Basic Rate Interface Specification, AT&T, 1985. |