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uses two wires. The gross bit rate is 160 kbit/s; 144 kbit/s throughput, 12 kbit/s sync and 4 kbit/s maintenance. The signals on the U reference point are encoded by two modulation techniques: 2B1Q in North
America, Italy and Switzerland, and 4B3T elsewhere. Depending on the
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offers point-to-point or point-to-multipoint operation; Max length: 900 metres (3,000 ft) (point-to-point), 300 metres (980 ft) (point-to-multipoint).
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of 192 kbit/s and – giving the data rates listed above – a maximum possible throughput of
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The BRI is split in two sections: a) in-house cabling (S/T reference point or S-bus) from the ISDN terminal up to the
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providing a total data rate of 128 kbit/s. The BRI ISDN service is commonly installed for
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from the B1 channel, 16 bits from B2 channel, 4 bits from the D channel, and 12 bits used for
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194:(NT1) and b) transmission from the NT1 to the central office (U reference point).
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The BRI configuration provides 2 data (bearer) channels (
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applicable cable length, two varieties are implemented,
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112:(ISDN) configuration intended primarily for use in
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233:purposes. These packets are sent at a rate of
120:. As such, an ISDN BRI connection can use the
116:similar to those that have long been used for
69:Learn how and when to remove this message
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32:This article includes a list of general
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204:International Telecommunication Union
213:) uses four wires; one pair for the
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344:Integrated Services Digital Network
110:Integrated Services Digital Network
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288:interface uses one wire pair with
174:(PRI) configuration provides more
38:it lacks sufficient corresponding
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122:existing telephone infrastructure
198:The in-house part is defined in
163:or small business service (ISDN
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316:"BRI defined on birds-eye.net"
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118:voice-grade telephone service
170:In contrast to the BRI, the
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206:(ITU). The S/T-interface (
217:and another pair for the
178:and operates at a higher
151:packet networking. The 2
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172:Primary Rate Interface
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192:network termination 1
167:) in many countries.
155:can be aggregated by
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90:Basic Rate Interface
186:Physical interfaces
302:network terminator
298:telephone exchange
296:cable between the
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16:ISDN configuration
290:echo cancellation
145:control signaling
106:Basic Rate Access
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318:. Archived from
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45:Please help to
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85:An ISDN phone
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324:. Retrieved
320:the original
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161:residential
51:introducing
326:2012-08-25
176:B channels
153:B channels
129:B channels
59:March 2013
34:references
294:last mile
264:Interface
133:D channel
338:Category
300:and the
242:bit rate
219:downlink
180:bit rate
139:or user
251:. The S
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223:packets
47:improve
281:. The
248:kbit/s
215:uplink
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200:I.430
137:voice
104:) or
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258:The
227:bits
165:PABX
149:X.25
141:data
102:2B1D
98:2B+D
246:144
237:kHz
94:BRI
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285:k0
278:p0
271:pN
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283:U
276:U
269:U
262:p
260:U
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210:0
208:S
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