Q: What is voice signaling conversion ?
A: In telecommunications, there are standards for how voice traffic
is transferred from equipment to telephone companies. They use
signaling protocols that tell the attached equipment information
about what is happening to the telephone call. This information,
depending on the signaling protocol can contain paramaters such as a
request to set up a call, a request to end the call or simply the
caller ID number. Since many of the standards have developed over
time and many of the older signaling protocols are still in use
today, we use voice signaling conversion to solve the issue of
incompatible or different signaling protocols between equipment,
telephone companies or any application with two different signaling
protocols.
Q: What are some examples of Voice
Signaling Protocols?
A: Many popular protocols include DTMF, E&M, R1, R2, C5, ETSI EURO
PRI, NI-2, J1, Qsig, V5.2, SS7, C7 and Proprietary PBX digital
signaling.
Q: Which Voice Signaling Protocols can
Pulse provide conversion solutions for ?
A: We can provide solutions for most any signaling protocol and many
variants. The signaling protocols include DTMF, E&M, R1, R2, C5,
ETSI EURO PRI, NI-2, J1, Qsig, V5.2, SS7, C7 and Proprietary PBX
digital signaling.
Q: What type of digital voice lines do
you support ?
A: We work with mostly E1 and T1 (G.703) digital lines. Most all of
voice signaling protocols are used on these standard voice circuits.
There may be issues where the E1 or T1 lines may be carried over a
larger circuit such as a DS-3 or STM-1 and Pulse has solutions to
address this.
Q: Do your products support AC or DC
power ?
A: Yes, most of the choices have options for AC or DC power, except
some low cost desktop units which support only AC power.
Q: Do your products support redundancy ?
A: Some of the higher end products support redundancy for SS7/C7
Signaling Links. Some products have support for redundant power
supplies.
Q: What are in-band and out of band
voice signaling protocols ?
A: There are two types of signaling methods. One is called Channel
Associated Signaling (CAS) and the other is Common Channel Signaling
(CCS). With CAS, separate signaling information is presented on each
voice channel. With CCS, one channel is dedicated for signaling
information shared by all the remaining channels which carry only
voice traffic. Examples of CAS signaling would be DTMF and R2.
Examples of CCS would be ISDN PRI, SS7 and C7.
Q: Are SS7 and C7 the same signaling
protocols ?
A: SS7 is the north american standard (ANSI SS7). C7 is the
international standard (ITU-C7). The functionality is basically the
same.
Q: What is proprietary PBX Signaling
?
A: Most well known brands of PBX and Hybrid Key Systems have digital
phones. These digital phones work by using digital signals to carry
the voice and telephone commands. These digital signals are only
compatible with the same manufacturer. These digital signals are not
compatible with most equipment you might use to extend voice
communications over IP or the Internet. In the past, the only
solution to extend phones from your PBX to a remote location was to
purchase another PBX or Hybrid Key System for that location. We now
have solutions to solve this
problem.
Q: Do you have a voice product
manufactured for the USA market but now have demand outside the
country ?
A: If so, we have voice signaling converters that allow you to
immediately address the issue while you develop international
standards. For example, maybe you have a IP PBX that was
originally designed for the USA market, but now Mexico wants your
product. Since Mexico operates with R2 and ETSI PRI, you need a way
to convert from DTMF or NI-2 to R2, we have the solution to get you
up and running immediately.
Q: How are Voice Signaling
Converters supported ?
A: Most installations can be supported remotely from the USA
to any international location. Support can be performed by the
Internet, IM, email or telephone. We also provide the option for
onsite support and installation. The choice is yours.