Lucent listed the following modules in the Legend 7.0 System Programming Guide:
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400LSR 4 loop-start line jacks with 4 touch-tone receivers
400GLR 4 ground-start/loop-start line jacks with 4 touch-tone receivers
800LS 8 loop-start line jacks
800GLID 8 ground-start/loop-start line jacks with Caller ID capability available on the loop-start lines and 2 touch-tone receivers
800GLS 8 ground-start/loop-start line jacks
408LSA 4 loop-start line jacks and 8 ATL analog extension jacks
408GLA 4 ground-start/loop-start line jacks and 8 ATL analog extension jacks
408GLM 4 ground-start/loop-start line jacks and 8 MLX extension jacks (16 endpoints)
[green]408GLM-U 4 ground-start/loop-start line jacks and 8 MLX extension jacks (16 endpoints); Caller ID; Upgradable with PCMCIA card[/green]
008ATL 8 analog extension jacks
008MLX 8 MLX extension jacks (16 endpoints)
008MLX-U 8 MLX extension jacks (16 endpoints); Upgradable with PCMCIA card
016MLX 16 MLX extension jacks (32 endpoints)
016MLX-U 16 MLX extension jacks (32 endpoints); Upgradable with PCMCIA card
012TR/OPT 12 tip/ring extension jacks with 2 touch-tone receivers or 008 OPT jacks
016TRR 16 tip/ring extension jacks with 4 touch-tone receivers
412LS/ETR 4 loop-start line jacks with Caller ID capability with 2 touch-tone receivers and 12 ETR extension jacks including 4 with tip/ring functionality
016ETR 16 ETR extension jacks including 6 with tip/ring functionality with 4 touch-tone receivers
800DID 8 DID trunk jacks with 2 touch-tone receivers
400E&M 4 E&M tie trunk jacks
100D 1 DS1 jack (24 channels) (Prior to Release 7.0, Common Channel Signaling (CCS) was an option for T1; for Release 7.0 and later systems, CCS is not an option for T1.)
100D-U 1 DS1 jack (24 channels); Upgradable with PCMCIA card
800BRI 8 BRI trunk jacks (16 channels)
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