Cisco Cisco 4G LTE Enhanced High-Speed WAN Interface Card for Verizon Information Guide
Q&A
© 2009 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information.
Page 2 of 3
Q.
Are these HWICs supported on the Cisco 1600, 1700, 2600, 3600, or 3700 Series Integrated Services
Routers?
A.
No.
Q.
Which protocols are supported by the HWIC-1T, HWIC-2T, and HWIC-2A/S?
A.
EIA-232, EIA-449, V.35, and X.21 are supported in DTE or DCE mode, and EIA-530 and EIA-530A are
supported in DTE mode.
Q.
Are any features missing from these HWICs?
A.
No support is available for the Airline Product Set (ALPS) and Unisys TS (UTS). For ALPS support, please use
the NM-4A/S, NM-8A/S, or NM-16A/S.
Q.
Do these HWICs offer any new features?
A.
Yes, the following are new features:
●
The HWIC-1T now has a Cisco Smart Serial or 5-in-1 connector.
●
Higher synchronous speeds up to 256 kbps.
●
More robust front-end protection on the HWIC-1DSU-T1
Q.
Do HWIC-1T, HWIC-2T, and HIWC-2A/S support the “lead manipulation” feature?
A.
No.
Q.
Do HWIC-1T, HWIC-2T, and HWIC-2A/S support the “Network Clock Synchronization” feature?
A.
No.
Q.
What are the speed and distance limitations?
A.
Signals can travel a limited distance at any given bit rate; generally, the slower the data rate, the greater the
distance. Table 1 shows the standard relationship between baud rate and maximum distance. These speed and
distance limitations depend on ideal cable and signaling characteristics. Because of this dependency on
external factors, the new HWICs are not guaranteed to operate at these speeds and distances.
Table 1.
EIA/TIA-232 Speed and Distance Limitations*
Data Rate (Baud)
Distance (Feet)
Distance (Meters)
2400
200
60
4800
100
30
9600
50
15
19,200
50
15
38,400
50
15
57,600
25
7.6
115,200
12
3.7
The use of balanced drivers allows EIA/TIA-449 signals to travel greater distances than the EIA/TIA-232 standard.
Table 2 lists the standard relationship between baud rate and maximum distance for EIA/TIA-449 signals. These
limits are also valid for V.35 and X.21.
Table 2.
EIA/TIA-449 Speed and Distance Limitations*
Data Rate (Baud)
Distance (Feet)
Distance (Meters)
2400
4,100
1,250
4800
2,050
625
9600
1,025
312