Citel 6000 ユーザーガイド
PBXgateway™ & EXTender™6000 System Administrator’s Guide
9
Types of Network Connections
The PBXgateway is designed to connect over a wide variety of third party network devices using three
types of network connections:
types of network connections:
• Synchronous-Serial connection (V.35, RS-530, RS-232)
• Asynchronous-Serial connection (RS-232)
• IP (10/100BaseT Ethernet)
• Asynchronous-Serial connection (RS-232)
• IP (10/100BaseT Ethernet)
Voice Transmission
At both the branch office and corporate sites, all voice and signaling information is placed into digital data
packets, which are then sent out over the data network. This data is transmitted digitally over the
connection as a series of “ones” and “zeroes”. The data packets are encapsulated within a MCK
Proprietary protocol called Remote Voice Protocol
packets, which are then sent out over the data network. This data is transmitted digitally over the
connection as a series of “ones” and “zeroes”. The data packets are encapsulated within a MCK
Proprietary protocol called Remote Voice Protocol
™ (RVP)
The most important consideration for packetizing voice is defining when each character begins.
Synchronous vs. Asynchronous Transmission
One way to do this is by providing a clock signal. At a precise time, the transmission starts. This is called
Synchronous (see page 14). In Asynchronous transmission, there is no clocking signal. The receiving
terminal knows what’s what because each character begins with a start bit and ends with a stop bit (see
page 15).
Synchronous (see page 14). In Asynchronous transmission, there is no clocking signal. The receiving
terminal knows what’s what because each character begins with a start bit and ends with a stop bit (see
page 15).
(VoIP)
The voice and signaling packets are sent using Internet Protocol (IP) over the packet-switched data
networks as opposed to using the traditional circuit-switched protocols. Voice packets get delivered to the
alternate device using the RVP. This protocol handles the timing and delivery of the packets (See page
16 for more information).
networks as opposed to using the traditional circuit-switched protocols. Voice packets get delivered to the
alternate device using the RVP. This protocol handles the timing and delivery of the packets (See page
16 for more information).