Telco Services - 3Com 3C8S5007 - SuperStack II PathBuilder S500 Switch User Manual

Telco Services

Table 3 Dial-Up and Leased Line Services
Telco Line
Dial-Up Lines:
Plain Old Telephone
Service (POTS)
ISDN
ISDN/PRI
Leased Lines:
E1
T1
Fractional T1
E3
T3
Digital Data Service (DDS) PPP
To use the PathBuilder WAN functionality, you must buy lines and services
from a telecommunications company (Telco). Services include but are not
limited to dial-up lines, leased lines, and packet-switched services.
Dial-up lines allow you to dial your destination when necessary and hang
up when you no longer need the connection. A leased line is always
available between two locations. Dial-up lines use the Point-to-Point
Protocol (PPP). Leased lines typically use either PPP, Frame Relay, or X.25.
Packet-switched services, like Frame Relay, use a combination of leased or
dial-up lines with Telco-owned switching. Typical protocols used over
packet-switched services are Frame Relay, X.25, and SMDS.
Table 3 and Table 4 describe the dial-up, leased, and packet-switched
services supported by the PathBuilder S5xx series switches.
Protocol Serial Device Requirements
PPP Modem
PPP Terminal Adapter
PPP None (on S590/S598 only)
Frame CSU/DSU (not needed on S590/S598 Ultra-WAN
Relay, PPP connectors)
Frame CSU/DSU (not needed on S590/S598 Ultra-WAN
Relay, PPP connectors)
Frame CSU/DSU (not needed on S590/S598 Ultra-WAN
Relay, PPP connectors)
Frame CSU/DSU (not needed on S593/S595 BNC
Relay, PPP connectors)
Frame CSU/DSU (not needed on S593/S595 BNC
Relay, PPP connectors)
CSU/DSU
17
Data Transfer Rate
Up to 115 Kbps
Up to 128 Kbps
2.048 Mbps/1.544
Mbps
2.048 Mbps
1.544 Mbps
Up to 31 channels at
56/64 Kbps each
34.368 Mbps
44.736 Mbps
Up to 64 Kbps