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185:(CPE). More advanced units will include internal monitors of the performance of the carrier in both directions and may have test pattern generation and monitor capabilities.
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family of service. The maintenance capabilities of the CSU provide important guidance as to whether the provider needs to dispatch a repairman to the customer location.
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173:, DDS, etc.) and by the capabilities within that class. For example, basic DS1 (T1) CSUs support loopback of each interface and will produce
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on the customer side. They are not used when the service terminates in a modem, such as the
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provides a barrier for electrical interference from either side of the unit; and
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is the last signal regeneration point, on the loop side, coming from the
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CSUs can be categorized by the class of service they support (
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providers at digital interfaces that terminate in a
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181:(NID) in the event of loss of signal from the
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134:and formatting pattern compatible with the
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77:Learn how and when to remove this message
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231: This article incorporates
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244:General Services Administration
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265:Telecommunications equipment
16:Telecommunications equipment
183:customer-premises equipment
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179:network interface device
32:This article includes a
175:alarm indication signal
154:data terminal equipment
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239:Federal Standard 1037C
233:public domain material
193:CSUs are required by
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130:may also provide a
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177:to the provider's
91:telecommunications
34:list of references
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246:. Archived from
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161:Common varieties
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38:related reading
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250:on 2022-01-22.
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67:January 2013
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53:Please help
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150:multiplexer
59:introducing
221:References
110:T-carrier
259:Category
209:See also
120:testing;
118:loopback
112:, which
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215:CSU/DSU
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132:framing
101:) is a
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235:from
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203:DSL
199:DSU
171:DS3
167:DS1
152:or
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89:In
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