WAN Subsystem Configuration and Management Manual

Overview of the WAN Subsystem
WAN Subsystem Configuration and Management Manual—522463-011
2-9
Protocols and Line Speeds
Protocols and Line Speeds
A SWAN concentrator can support various line speeds based on the protocol used.
With one exception, these line speeds are comparable to that of older controllers on
the NonStop K-series servers.
Byte-oriented protocols (Bisync and Async) are supported at a 19.2 Kbps single line
per CLIP for SWAN concentrators. The processor on a SWAN CLIP might not be fast
enough to service two lines if the protocol used requires a lot of processing and the line
is running at high speed. Table 2-5 shows those protocols that prohibit the use of the
second line on a CLIP when run at the maximum line speeds indicated. However, the
SWAN concentrator can use both lines of a CLIP if you configure the line speed to half
(for example, change the 256 Kbps to 128 Kbps). This is true for all protocols.
SWAN 2 concentrators can use the second line on a CLIP without any limitations.
Connecting Multiple SWAN Concentrators
You can connect multiple SWAN 2 concentrators by connecting an Ethernet controller
through any 10-megabit or 100-megabit hub or switch.
You can use a router to connect SWAN 2 concentrators; however using a router
requires additional configuration (see Connecting the SWAN Concentrator Through
Ethernet Routers on page 4-6).
Table 2-5. Protocols and Maximum Lines Speeds
Protocol Maximum Line Speed Lines Configured
AM3270 19.2 Kbps 1 per CLIP
ATP6100 19.2 Kbps 1 per CLIP
CP6100 with any byte-
synchronous DLC 19.2 Kbps 1 per CLIP
CP6100 with WANADCCP
64 Kbps (RS-449,V.35)
64 Kbps (X.21) 1 per CLIP
Expand 256 Kbps 1 per CLIP
Envoy 19.2 Kbps 1 per CLIP
EnvoyACP/XF 256 Kbps 1 per CLIP
SNAX 256 Kbps 1 per CLIP
TR3271 19.2 Kbps 1 per CLIP
X25AM 256 Kbps 1 per CLIP
These line speeds apply to all electrical interfaces, except RS-232 which does not support line speeds above
19.2 Kbps.
Expand does not work with the X.21 interface.