M3900 telephone sets and accessories minimum firmware and release numbers 107Table 27Meridian SL-100 /M3900 Phase 3 feature compatibility (cont’d.)FeatureMinimumMSL Release M3902 M3903 M3904 M3905Redial & Callers List Erase (VirtualOffice)N/A Feature not available on MeridianSL-100.Note 1: Full Icon Support is also compatible with Key-based Expansion Modules and Display-basedExpansion Modules.Note 2: With appropriate patches applied.Note 3: M3904 Phase 1 and 2 sets cannot be firmware upgraded to a Phase 3 set supporting FullDuplex Handsfree. A new M3904 Phase 3 set is required to support the Full Duplex HandsfreeAccessory.Note 4: Secondary DN Dialing is available on the M3903, M3904, and M3905 Phase 3 sets withMSL11 and above; however, the message "Select Free Line" that is displayed on the M3905 isnot available until MSL15.M3900 telephone sets and accessories minimum firmware andrelease numbersThe M3900 Release 2 telephone sets and expansion modules that aresupported on the Meridian SL-100 require the minimum firmware releasesthat Table 28 "M3900 Release 2 minimum firmware releases" (page107) shows.Table 28M3900 Release 2 minimum firmware releasesComponent Minimum firmware/Release numbersM3902 Firmware version 4.0M3903 Firmware version 5.2M3904 Firmware version 4.6M3905 Firmware version 4.8Key-based Expansion Module Release 02Display-based Expansion Module Release 06The M3901 does not support firmware upgrades.The M3900 Release 3 telephone sets that are supported on the MeridianSL-100 require the minimum firmware releases that Table 29 "M3900Release 3 minimum firmware releases" (page 108) shows.Nortel Communication Server 2100M3900 Series Meridian Digital Telephones User GuideNN42200-110 09.01 Standard20 August 2008Copyright © 2008 Nortel Networks.