Interphase Tech ispan 5535 pri Manual Do Utilizador

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A 56 Kbps or 64 Kbps bearer channel. Typically used for 

delivering data or voice over ISDN.

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A type of telecommunications service that provides 

the capability to transmit a specific type of data such as voice or fax.

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Bonding is the act of combining two 64 Kbps B-channels 

to derive a 128 Kbps channel. This is done by establishing two B-chan-
nel circuit-switched calls and combining them in the customer’s equip-
ment (using Multilink PPP or the bonding specification) or by 
associating multiple B-channels in the network (multi-rate services). 

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A BPV error event for an AMI-coded sig-

nal is the occurrence of a pulse of the same polarity as the previous 
pulse. 

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A defined ISDN interface that includes 

two B channels and one D channel. Also known as 2B+D. B channels 
are used for voice and data while the D channel is generally used only 
for signalling within the telephone network.

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The ability to receive an incoming call during a 

bonded outbound call. 

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See ITU (International Telecommunication Union) on 

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Local Public Exchange with PBX facilities.

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Channel aggregation combines multiple phys-

ical channels into one logical channel of greater bandwidth. 

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The site where the local Telco switches reside 

for all the telephone system’s call routing and other functions. This is 
the Telco side of the local loop. If the distance between your location 
and the central office switch exceeds 18,000 feet and/or the signal loss 
exceeds 35.0 dB, a repeater must be installed to allow ISDN service.

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A type of I/O cycle provided on the PCI bus to 

facilitate system configuration.

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All equipment that resides 

beyond the telephone service demarcation point. In the USA this typi-
cally includes the NT1 and all ISDN devices. Customer equipment 
may also include inside wiring, as well as telephone modems, ISDN 
equipment, and so on.