36:
292:
261:(KPIs) used by the network operators to assess the performance of their networks. It is assumed to have direct influence on the customer satisfaction with the service provided by the network and its operator. The call setup success rate is usually included, together with other technical parameters of the network, in a key performance indicator known as
216:. In many practical cases, this definition needs to be further expanded with a number of detailed specifications describing which calls exactly are counted as successfully set up and which not. This is determined to a great degree by the stage of the call setup procedure at which a call is counted as connected. In modern
224:, the call setup procedure maybe very complex and the point at which a call is considered successfully connected may be defined in a number of ways, thus influencing the way the call setup success rate is calculated. If a call is connected successfully but the dialled number is busy, the call is counted as successful.
238:) networks is extremely high and is significantly above 99.9%. In mobile communication systems using radio channels the call setup success rate is lower and may range for commercial networks between 90% and 98% or higher. The main reasons for unsuccessful call setups in mobile networks are lack of
268:
The operators of telecommunication networks aim at increasing the call setup success rate as much as practical and affordable. In mobile networks this is achieved by improving radio coverage, expanding the capacity of the network and optimising the performance of its elements, all of which may
201:) is the fraction of the attempts to make a call that result in a connection to the dialled number (due to various reasons not all call attempts end with a connection to the dialled number). This fraction is usually measured as a percentage of all call attempts made.
254:
between different subscribers, imperfections in the functioning of the network (such as failed call setup redirect procedures), overload of the different elements of the network (such as cells), etc.
173:
signal; (b) selection time—the time from the delivery of the proceed-to-select signal until all the selection signals have been transmitted; and (c) post selection time—the time from the end of the
296:
262:
213:
239:
209:
166:
205:
65:
301:
333:
174:
87:
58:
17:
307:
278:
338:
178:
113:
258:
212:. A call setup procedure may fail due to a number of technical reasons. Such calls are classified as
136:
48:
52:
44:
69:
150:, the overall length of time required to establish a circuit-switched call between terminals;
269:
require considerable effort and significant investments on the part of the network operator.
217:
177:
of the selection signals until the delivery of the call-connected signal to the originating
343:
228:
165:
Call set-up time is the summation of: (a) call request time—the time from initiation of a
8:
227:
Another term, used to denote call attempts that fail during the call setup procedure, is
251:
190:
147:
117:
170:
101:
311:
221:
109:
140:
327:
154:
the time from the initiation of a call request to the beginning of the call
317:
235:
243:
208:
invokes a call setup procedure, which, if successful, results in a
155:
247:
132:
234:
The call setup success rate in conventional (so-called
325:
57:but its sources remain unclear because it lacks
116:. Call setup is typically accomplished using a
257:The call setup success rate is one of the
88:Learn how and when to remove this message
14:
326:
29:
169:to the delivery to the caller of a
24:
25:
355:
108:is the process of establishing a
295: This article incorporates
290:
34:
308:General Services Administration
184:
13:
1:
284:
279:Clearing (telecommunications)
127:has the following meanings:
7:
272:
10:
360:
259:key performance indicators
222:cellular (mobile) networks
114:telecommunications network
27:Telecommunications process
334:Communications protocols
204:In telecommunications a
135:required to establish a
43:This article includes a
195:call setup success rate
72:more precise citations.
303:Federal Standard 1037C
297:public domain material
218:communications systems
131:The overall length of
316: (in support of
263:service accessibility
214:failed call attempts
339:Computer networking
252:radio interference
191:telecommunications
148:data communication
118:signaling protocol
45:list of references
171:proceed-to-select
102:telecommunication
98:
97:
90:
16:(Redirected from
351:
321:
315:
310:. Archived from
294:
293:
125:call set-up time
93:
86:
82:
79:
73:
68:this article by
59:inline citations
38:
37:
30:
21:
18:Call set-up time
359:
358:
354:
353:
352:
350:
349:
348:
324:
323:
300:
291:
289:
287:
275:
242:(either in the
187:
110:virtual circuit
94:
83:
77:
74:
63:
49:related reading
39:
35:
28:
23:
22:
15:
12:
11:
5:
357:
347:
346:
341:
336:
314:on 2022-01-22.
286:
283:
282:
281:
274:
271:
240:radio coverage
210:connected call
186:
183:
167:calling signal
160:
159:
144:
143:between users.
96:
95:
53:external links
42:
40:
33:
26:
9:
6:
4:
3:
2:
356:
345:
342:
340:
337:
335:
332:
331:
329:
322:
319:
313:
309:
305:
304:
298:
280:
277:
276:
270:
266:
264:
260:
255:
253:
249:
245:
241:
237:
232:
230:
229:blocked calls
225:
223:
219:
215:
211:
207:
202:
200:
196:
192:
182:
180:
176:
172:
168:
164:
157:
153:
149:
145:
142:
138:
134:
130:
129:
128:
126:
121:
119:
115:
111:
107:
103:
92:
89:
81:
78:November 2021
71:
67:
61:
60:
54:
50:
46:
41:
32:
31:
19:
312:the original
302:
288:
267:
256:
233:
226:
206:call attempt
203:
198:
194:
188:
185:Success rate
175:transmission
162:
161:
151:
124:
122:
105:
99:
84:
75:
64:Please help
56:
344:Teletraffic
318:MIL-STD-188
70:introducing
328:Categories
285:References
220:, such as
139:-switched
106:call setup
236:land-line
123:The term
112:across a
273:See also
244:downlink
179:terminal
246:or the
156:message
137:circuit
66:improve
248:uplink
193:, the
299:from
163:Note:
152:i.e.,
51:, or
199:CSSR
146:For
141:call
133:time
250:),
189:In
100:In
330::
320:).
306:.
265:.
231:.
181:.
120:.
104:,
55:,
47:,
197:(
158:.
91:)
85:(
80:)
76:(
62:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.