Adtran 1222401L1
HDSL4 Plug-in Modules  220 H4TU-C 1222401L1
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The ADTRAN 220 HDSL4 Transceiver Unit for the Central Office (H4TU-C) (ADTRAN
P/N 1222401L1) is the Central Office (CO) unit used to deploy an HDSL4 T1
circuit using 4-wire metallic facilities. The unit occupies one slot in a 220
shelf.
The DS1 or DSX-1 input signal is supplied from the network. The HDSL4 signals
are provided to the local loop. The ADTRAN 220 H4TU-C works in conjunction with
the ADTRAN H4TU-R and up to two H4Rs to provide a DS1 service on the local
loop.
The 220 H4TU-C can be deployed in circuits consisting of one H4TU-C, one
H4TU-R, and up to two H4Rs. System power and alarm bus connections are made
through the backplane of the 220 shelf. The H4TU-C contains an onboard fuse. If
the fuse opens, it supplies a –48 VDC voltage to the fuse alarm bus and all
front panel indicators will be Off. This fuse is not designed to be replaced in
the field.
The 220 H4TU-C uses a DC-to-DC converter to derive its internal logic and
span powering voltages from the –48 VDC office supply. The H4TU-C can span power
an H4TU-R and up to two H4Rs as listed above. Span powering voltages (negative
with respect to ground, –190 VDC nominal, GFI 5 mA) meet all requirements of
Bellcore GR-1089-CORE (Class A2) and ANSI T1.418-2002.
Your Adtran 1222401L1 is ready for immediate shipment the same day you place your order in most cases and every product we sell comes with an industry leading One-Year Warranty. Plus, with our ADC Warranty Shield program we can even offer you a Lifetime Warranty. Our relationship doesn't end when the sale is completed. It's just beginning. Free technical support is available toll free by calling (888)872-5619.
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