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Cards In This Set
| Front | Back |
|
Supervisory signaling
|
On hook, off hook, ringing
|
|
Informational signaling
|
Dial tone, busy, ringback, and so on
|
|
Address signaling
|
Dual-tone multifrequency (DTMF) and Pulse
|
|
Digital signal 0 (DS0)
|
T1 circuit is built from 24 separate 64-kbps channels
|
|
E1 circuits
|
Allow you to use up to 30 DS0s for voice calls
|
|
Channel associated signaling (CAS)
|
Signaling information is transmitted using the same bandwidth as the voice.
|
|
Common channel signaling (CCS)
|
Signaling information is transmitted using a separate, dedicated signaling channel.
|
|
Robbed bit signaling (RBS)
|
T1 CAS steals bits from the voice channel to transfer signaling information
|
|
Voice device running the T1 line uses which bit on every sixth sample in each T1 channel (DS0)
|
Eighth
|
|
Provide the connection between telephone handsets and the PBX system
|
Line cards
|
|
Which is the signaling protocol used for ISDN circuits
|
Q.931
|
|
Provide connections from the PBX system to the PSTN or other PBX systems
|
Trunk cards
|
|
Provides the intelligence behind the PBX system; all call setup, routing, and management functions are contained in the?
|
Control complex:
|
|
E.164 numbers are limited to a maximum length of how many digits
|
15
|
|
Each number in the E.164 numbering plan contains what components
|
• Country code
• National destination code • Subscriber number |
