Knowledgebase
Online Technical Support
Software Upgrades: Please check our latest Download section.
Search Tip: You can increase the accuracy of your searches by using as many keywords as possible. Remove any common words such as "a", "or", "the" as they will be used in the search. Do not use any operands such as +, or quotation marks to enclose phrases.
|
Issue:
what type of service should I purchase for the Perle 833As or 833Is
Solution:
· Integrated Services Digital Network
· allows existing phone lines to carry digital information
· more of a dial up service than a permanent lease connection
· Two main interfaces
· BRI Basic Rate Interface
· PRI Primary Rate Interface
Comparison of BRI and PRI Services
|
BRI |
PRI (US/Japan) |
PRI (Europe) |
Channels |
|
|
|
Data Channels |
2 |
23 |
30 |
Control Channels |
1 |
1 |
1 |
Data Channel Speed |
64k |
64k |
64k |
Control Channel Speed |
16k |
64k |
64k |
Bandwidth |
160kbps |
1.544Mbps |
2.048Mbps |
· B channels are used to carry data/voice
· D channels are used for call control and signaling (call set up and tear-
down)
· each B channel can support one call (digital or analog) at a time
· delivered from the telco over a single twisted pair wire
· in some places, due to poor/old equipment, data speeds may be
limited to 56k instead of 64k and only one channel is standard instead
of two.
Related
Articles:
1.) Ordering information for ISDN BRI U
2.) Ordering information for T1 / PRI