This is a market survey to locate sources for the cyclic and catastrophic overhaul of battlefield communications shelters and their associated hardware used in the U.S. Army Mobile Subscriber Equipment (MSE) communications system. The assemblages (to include shelters and associated equipment) to be overhauled under this procurement are Small Extension Node switches, AN/TTC-48A(V)2, AN/TTC-48C(V)1, V2, V3, V4, AN/TTC-48D(V)1, V2, AN/TTC-48E(V)1, V2, V3, AN/TTC-48F(V)1, V2 and V3; Large Extension Switch ing Group, ON-305(V)1 /TTC-46C(V), -46E(V) and â46F(V); Large Extension Operations Groups, OL-412D(V)1/TTC-46D(V) and OL-412D(V)2/ TTC-46D(V), OL-412E(V)1/TTC-46D(V), OL-412E(V)2/TTC-46D(V); Node Center Switching Groups, ON-306C(V)1/TTC-47C(V) and ON- 306D(V)1/TTC-47E(V), ON-306E(V)1/TTC-47F, ON-306F(V)/TTC-47G(V)1; Node Center Operations Groups, OL-413D(V)1/TTC-47D(V), OL-413D(V)2/TTC-47D(V), OL-413E(V)1/TTC-47E(V), OL-413F(V)1/TTC-47F, OL-413F(V)2/TTC-47F; LOS Multi-channel Radio Terminals, AN/TRC-190 (V)1 V2, V3, and V4, AN/TRC-190A(V)1 V2, V3, and V4 and AN/TRC-190B(V)3, AN/TRC-190C(V)1, V2, V3 and V4; Radio Access Units, AN/TRC-191A(V)1, (V)2; Communications Central, AN/TTC-50; LOS Multichannel Radio Terminals, AN-TRC-198(V)1 and AN/TRC-198(V)2; Mana gement Facility, AN/TSQ-154A; Spares Facility, AN/TSM-183; Maintenance Facility, AN/TSM-182. These shelters, completely populated with communications equipment were procured from General Dynamics C4 Systems, formerly GTE Government Systems Corporation. The shelter overhaul effort will include initial testing of the shelters and their associated equipment, removal of the equipment, overhaul or repair of the equipment, structural and cosmetic refurbishment of the shelters, reinstallation of the equipment, and final operational testing of the overhauled shelter. The contractor for this work must be proficient in testing the performance of digital communications systems equipment, and must have clearance for communications security (COMSEC) equipment. The Army c annot provide detailed technical data on the design/construction of the shelters, or on the design, testing, and diagnostics of the installed equipment. The Army will specify the Shelter Product Acceptance Test, but cannot provide specialized test equipmen t. For more detailed information regarding this proposed acquisition, please visit the Army Single Face to Industry (ASFI) Interactive Business Opportunties Page (IBOP) website at the following URL: https://abop.monmouth.army.mil. Upon accessing this webpag e, click U.S. Army Market Research Listings under the Other Services heading. Contractors will require a user ID and password to view documents on the IBOP. Registration for a user ID and password will only be through the IBOP. This notice does not constitute a Request for Proposal and is not to be construed as a commitment by the Government. The Government will not reimburse contractors for any cost incurred for their participation in this survey.