The 7705 SAR-8 is a two-rack unit (2 RU) version of the 7705 SAR with industry-leading access density. The platform can be optionally configured with a redundant control and switch module and uplinks. The AlcatelLucent 7705 SAR-8 has eight slots; two are allocated for control and switch modules (CSMs), with the remaining six being available for user traffic adapter cards. The AlcatelLucent 7705 SAR-8 has a compact, modular architecture, constructed to allow flexible use of line adapter cards so operators can optimize the configuration to meet the specific requirements of a site. With the modular architecture comes additional resilience and flexibility. The platform can optionally support 1+1 fully redundant CSMs. This industry-leading, independently validated High Availability feature has been inherited from the Service Router product line and is a strong contributor to overall network uptime. Network uplink connectivity options are: Ethernet, FE, GigE, n × T1/ E1 MLPPP or n × T1/E1 ATM IMA. Integrated DS3 point-to-point trunking is supported using the 4-port DS3 adapter card. OC-3/STM-1 trunking is supported using Packet over SONET/ SDH (POS) on the 4-port OC-3/STM-1 clear channel adapter card.