Centrex/PBX access code If the system is to be used behind Centrex or another PBX, you must list the dial access code used to gain access to a CO line from Centrex or the PBX, so that toll restriction can ignore the access code digit(s). Users must dial the access code after accessing a line by either: (a.) Dialing 9, 8, 71, 72, 73, 74, 75, or 76. or (b.) Pressing a line key (if programmed). The access code can be one or two digits — e. g., 9, 81, etc. — and must be programmed for each line group. Default: 0. Note: You must set the flash duration in Function 151 (page E.3) for the requirements of the host switch. Function 222: Toll restriction exception tables The system’s toll restriction is based on outbound calls being defined as either toll calls (i.e., calls in the deny table) or non-toll calls (calls in the allow table). Four tables exist for this purpose: 1. Allow exception table (programmable). Up to 100 entries; no entry can exceed 26 digits. Default: No entries. 2. Deny exception table (programmable). Up to 100 entries; no entry can exceed 26 digits. Default: No entries. A number listed in the allow exception table — e.g., a branch office or vendor’s location — will be allowed to all stations, regardless of how they’re set in Function 32 (see page G.19). Conversely, a number listed in the deny exception table (e.g., a “1-900” number) will be denied to all stations. 3. Fixed allow table (not programmable). Default: 1800, 1888, 1877, 1866, 1855, 1844, 1833 and 1822. 4. Fixed deny table (not programmable). Default: 976, 1976, 1xxx976, 900, 1900, 1xxx900, 555, 1555, 1xxx555, 0, 10, 411, 1411 and 11+-digit restriction. In extension feature authorization (Function 321; see page G.19), each extension is set to be toll-restricted one of two ways: TOLL CALLS = Y (yes) or TOLL CALLS = N (no).