Datasheet

3-8
Cisco Interface Card Hardware Installation Guide
OL-1919-18
Chapter 3 Connecting Serial Interface Cards to a Network
Serial High Speed WICs (HWICs)
16-Port Asynchronous HWIC
The 16-port asynchronous HWIC (HWIC-16A), illustrated in Figure 3-10, provides 16 asynchronous
RS-232 interfaces in DTE format, at data rates of up to 230.4 kbps.
Caution To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety,
connect the 16-port asynchronous HWIC (HWIC-16A) only to intra-building or non-exposed wiring or
cabling. The intrabuilding cable must be shielded and the shield must be grounded at both ends.
Figure 3-10 16-Port Asynchronous HWIC Front Panel (HWIC-16A)
LED Status
Due to the high port density on the HWIC front panels, the amount of LED status per port is limited.
There is no room for individual LEDs to indicate transmit or receive activity, or clock status.
HWIC-4T and HWIC-4A/S have a single bi-color LED to monitor status over four ports. HWIC-8A has
a single LED to monitor status over 8 ports. There are two LEDs on the HWIC-8A/S-RS232 that monitor
4 ports each. On the HWIC-16A, two LEDs monitor 8 ports each.
See Table 3-1 for the definition of HWIC LED Status.
CONNCONN
HWIC-16A
0-7
8-15
117623
Serial ports
CONN LEDs
Table 3-1 HWIC LED Status
LED Status Definition
Solid Green Monitored ports are active (have initialized without error).
Solid Yellow At least one monitored port is in loopback mode.
Off Monitored ports are not active or have failed to initialize.