Alan Freedman -- The Computer Language Company - Computer Desktop Encyclopedia
Computer Desktop Encyclopedia
Longest-Running Tech Reference on the Planet

A CDE Definition

You'll love The Computer Desktop Encyclopedia (CDE) for Tech Term of the Day (TTOD)


robbed bit signaling

A signaling method in a T1 circuit that uses bits from each of the 24 DS-0 channels. When channels carry switched voice traffic, each channel bank must be able to alert the other when a call is being placed on that channel. T-carrier systems grab one bit from each sixth voice sample to do this, which works out to 1,333 bps from the 64 Kbps channel. When a channel is seized from one end, the signaling bit is changed from 0 to 1 to alert the far end.

The other signaling option is an ISDN PRI circuit where all signals travel in a separate, shared "D" channel carried in the 24th time slot. See T1, B8Zs and ones density.

Personal Use Only

Before/After Your Search Term
rnrobo advisor
RNGrobo call
RNIrobo lawyer
RO terminalrobocall
road ragerobot
road warriorrobot car
roadcastingrobot taxi
Roadrunnerrobotic assistant
roamingrobotic process automation

Terms By Topic
Click any of the following categories for a list of fundamental terms.
Computer Words You Gotta KnowSystem design
Job categoriesUnix/Linux
Interesting stuffPersonal computers
InternetIndustrial Automation/Process Control
Communications & networkingAssociations/Standards organizations
HistoryDesktop publishing
ProgrammingHealthcare IT
System design