HP J2623-69001 - AdvanceStack Dial-a-LAN module - Provides dial-in/dial-out access when inserted in AdvanceStack hub expansion slot - Has two RJ-11 connectors for internal 28.8Kbps modems - (J2623A) Retail
HP J2624-61001 - AdvanceStack Dial-a-LAN module - Provides dial-in/dial-out access when inserted in AdvanceStack hub expansion slot - Has four RS-232 (DB-9) connectors for external modems - (J2624A) Retail